Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 155
Filtrar
1.
Physiol Plant ; 177(1): e70097, 2025.
Artigo em Inglês | MEDLINE | ID: mdl-39887727

RESUMO

This study investigates the physiological and morphological responses of wheat (Triticum aestivum) and pea (Pisum sativum) grown in a mixture of lunar soil (LS) simulant and organic soil (OS). The experiment compared the growth of both pea and wheat in 100% organic soil (OS) and a 3:2 mixture of OS and LS (OS: LS). Wheat exhibited increased branching and root growth in OS: LS, while pea plants showed enhanced aerial elongation and altered branch morphology. Photochemical efficiency (Fv/Fm) and pigment concentrations were significantly affected, with both pea and wheat showing reduced chlorophyll content in OS: LS. Oxidative stress indicators, such as lipid peroxidation, exhibited higher levels in pea plants than wheat plants, particularly in the OS: LS mixture. Hormonal analysis performed by LC-MS/MS indicated significant increases in abscisic acid (ABA) and its catabolites in both pea and wheat in OS: LS, suggesting an adaptive response to suboptimal conditions. The results highlight species-specific growth strategies, with wheat investing more in root development and pea plants promoting aerial growth. These findings provide important insights into how essential crops could adapt to extraterrestrial soils, contributing to the development of sustainable agricultural practices for space exploration. Future research should focus on optimising crop performance based on species-specific adaptative responses in mixed-soil environments.


Assuntos
Pisum sativum , Reguladores de Crescimento de Plantas , Raízes de Plantas , Solo , Triticum , Triticum/fisiologia , Triticum/crescimento & desenvolvimento , Triticum/metabolismo , Pisum sativum/fisiologia , Pisum sativum/crescimento & desenvolvimento , Pisum sativum/metabolismo , Pisum sativum/efeitos dos fármacos , Solo/química , Raízes de Plantas/fisiologia , Raízes de Plantas/crescimento & desenvolvimento , Raízes de Plantas/metabolismo , Reguladores de Crescimento de Plantas/metabolismo , Lua , Clorofila/metabolismo , Ácido Abscísico/metabolismo , Fotossíntese/fisiologia , Estresse Oxidativo
2.
Int J Med Mushrooms ; 26(10): 55-67, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39171631

RESUMO

Solid-state fermentation of cereals with edible fungi is a promising strategy for producing functional flours. Hypothetically, the nutritional and functional properties of these flours could be modulated by manipulating substrate composition, fungal species, and incubation conditions. This article reports the variation over time in nutritional, polyphenol, and triterpene contents, as well as the antioxidant activity of rice and wheat fermented with Ganoderma sessile and Pleurotus ostreatus. Solid-state fermentation significantly improved the antioxidant power of the substrates which seemed to be highly correlated with the increase of the phenolic compounds. This increase peaked in the second to third week and decreased after this point. Triterpene content also increased, especially in substrates fermented with G. sessile. Substrates fermented with G. sessile showed higher values than those fermented with P. ostreatus in all compounds, which could be a result of a higher growth rate. Fermented wheat showed higher values than fermented rice in all measured compounds except reducing sugars which can be related to a slower progress in the fermentation due to the more complex structure of the wheat grain. Our results reinforce the importance of substrate and strain selection for product modulation to meet the industry's growing needs.


Assuntos
Antioxidantes , Grão Comestível , Fermentação , Ganoderma , Valor Nutritivo , Oryza , Pleurotus , Triticum , Pleurotus/metabolismo , Pleurotus/crescimento & desenvolvimento , Pleurotus/química , Antioxidantes/metabolismo , Antioxidantes/análise , Ganoderma/metabolismo , Ganoderma/química , Ganoderma/crescimento & desenvolvimento , Oryza/química , Oryza/metabolismo , Grão Comestível/química , Grão Comestível/metabolismo , Triticum/química , Triticum/metabolismo , Polifenóis/metabolismo , Polifenóis/análise , Polifenóis/química , Triterpenos/metabolismo
3.
Bioprocess Biosyst Eng ; 47(7): 1081-1094, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38739268

RESUMO

Wheat bran is one of the most abundant by-products from grain milling, which can be used as substrate for solid-state fermentation (SSF) to obtain enzymes able to convert this agro-industrial waste into glucose syrup, which in turn can be applied for the production of different food products. The present study aimed to determine centesimal composition of wheat bran, obtain enzymatic extract that converts wheat bran into wheat glucose syrup (WGS), produce rice flakes cereal bars (RFCB), and evaluate their nutritional composition and the presence of functional compounds, as well as their antioxidant potential. Determination of centesimal composition of wheat bran demonstrated its nutritional potential. Enzymatic extract was obtained and it converted wheat bran into WGS, which were applied to rice flakes producing RFCB. These cereal bars proved to be a source of dietary fiber (1.8 g) and soluble protein (7.2 g) while RCFB produced with corn glucose syrup did not present these nutritional components. In addition, RFCB produced with WGS showed polyphenolic compounds, among them flavonoids, which exhibited antioxidant activity by DPPH and ABTS radical scavenging (47.46% and 711.89 µM Trolox Equivalent/g, respectively), and iron ion reduction (71.70 µM Trolox equivalent/g). Final product showed a decrease in caloric value and sodium content. Therefore, the present study showed that the bioprocess of SSF yields a nutritional, ecological, and functional food product, which might be of great interest for food industry, adding nutritional and functional value to a well-stablished product.


Assuntos
Antioxidantes , Fibras na Dieta , Grão Comestível , Fermentação , Glucose , Glucose/metabolismo , Antioxidantes/metabolismo , Grão Comestível/química , Oryza/química , Triticum/metabolismo , Triticum/química
4.
J Agric Food Chem ; 72(34): 19197-19218, 2024 Aug 28.
Artigo em Inglês | MEDLINE | ID: mdl-38803291

RESUMO

Cereal grains play an important role in human health as a source of macro- and micronutrients, besides phytochemicals. The metabolite diversity was investigated in cereal crops and their milling fractions by untargeted metabolomics ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) of 69 samples: 7 species (barley, oat, pearl millet, rye, sorghum, triticale, and wheat), 23 genotypes, and 4 milling fractions (husk, bran, flour, and wholegrain). Samples were also analyzed by in vitro antioxidant activity. UHPLC-MS/MS signals were processed using XCMS, and metabolite annotation was based on SIRIUS and GNPS libraries. Bran and husk showed the highest antioxidant capacity and phenolic content/diversity. The major metabolite classes were phenolic acids, flavonoids, fatty acyls, and organic acids. Sorghum, millet, barley, and oats showed distinct metabolite profiles, especially related to the bran fraction. Molecular networking and chemometrics provided a comprehensive insight into the metabolic profiling of cereal crops, unveiling the potential of coproducts and super cereals such as sorghum and millet as sources of polyphenols.


Assuntos
Antioxidantes , Grão Comestível , Espectrometria de Massas em Tandem , Antioxidantes/metabolismo , Antioxidantes/química , Antioxidantes/análise , Grão Comestível/química , Grão Comestível/metabolismo , Cromatografia Líquida de Alta Pressão , Sorghum/química , Sorghum/metabolismo , Avena/química , Avena/metabolismo , Avena/genética , Triticum/química , Triticum/metabolismo , Triticum/genética , Flavonoides/metabolismo , Flavonoides/análise , Flavonoides/química , Extratos Vegetais/química , Extratos Vegetais/metabolismo , Milhetes/química , Milhetes/metabolismo , Milhetes/genética , Hordeum/química , Hordeum/metabolismo , Hordeum/genética , Sementes/química , Sementes/metabolismo , Metabolômica , Produtos Agrícolas/química , Produtos Agrícolas/metabolismo , Produtos Agrícolas/genética
5.
BMC Plant Biol ; 24(1): 314, 2024 Apr 23.
Artigo em Inglês | MEDLINE | ID: mdl-38654167

RESUMO

BACKGROUND: Water stress is a major danger to crop yield, hence new approaches to strengthen plant resilience must be developed. To lessen the negative effects of water stress on wheat plants, present study was arranged to investigate the role of synergistic effects of biochar, trans-zeatin riboside (t-ZR), and Azospirillum brasilense on soil improvement and enzymatic activity in water-stressed wheat. RESULTS: In a three-replication experiment comprising of four treatments (T0: Control, T1: Drought stress (DS), T2: DS + t-ZR with biochar, T3: DS + A. brasilense with biochar), we observed notable improvements in soil quality and enzymatic activities in water-stressed wheat plants with the application of t-ZR and A. brasilense with biochar. In drought stress, Treatment having the application of A. brasilense with biochar performs best as compared to the other and significant increased the enzymatic activities such as peroxidase (7.36%), catalase (8.53%), superoxide dismutase (6.01%), polyphenol oxidase (14.14%), and amylase (16.36%) in wheat plants. Different enzymatic activities showed different trends of results. Soil organic C, dissolved organic C, dissolved organic N also enhanced 29.46%, 8.59%, 22.70% respectively with the application of A. brasilense with biochar under drought stress condition. CONCLUSIONS: The synergistic action of A. brasilense and biochar creates an effective microbiological environment that supports essential plant physiological processes during drought stress. This enhancement is attributed to improved soil fertility and increased organic matter content, highlighting the potential of these novel strategies in mitigating water stress effects and enhancing crop resilience.


Assuntos
Azospirillum brasilense , Carvão Vegetal , Solo , Triticum , Triticum/metabolismo , Azospirillum brasilense/fisiologia , Solo/química , Desidratação , Secas
6.
Food Chem ; 448: 139123, 2024 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-38552461

RESUMO

In the present work, liposomes have been used as nanocarriers in the biofortification of wheat plants with selenium (Se) through foliar application. Liposomal formulations were prepared using 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) and Phospholipon®90H (P90H) (average size <100 nm), loaded with different concentrations of inorganic Se (selenite and selenate) and applied twice to the plants in the stage of vegetative growth. Liposomes enhanced Se uptake by wheat plants compared to direct application. The highest Se enrichment was achieved using the phospholipid DPPC and a concentration of 1000 µmol·L-1 of Se without affecting the biomass, chlorophylls, carotenoids, and the concentration of mineral nutrients of the plants. The chemical speciation of Se in the plants was further investigated by X-ray absorption spectroscopy (XAS). The results from XAS spectra revealed that most of the inorganic Se was transformed to organic Se and that the use of liposomes influenced the proportion of C-Se-C over C-Se-Se-C species.


Assuntos
Biofortificação , Lipossomos , Folhas de Planta , Selênio , Triticum , Triticum/química , Triticum/crescimento & desenvolvimento , Triticum/metabolismo , Lipossomos/química , Selênio/química , Selênio/metabolismo , Selênio/análise , Folhas de Planta/química , Folhas de Planta/metabolismo , Folhas de Planta/crescimento & desenvolvimento , Nanopartículas/química , Portadores de Fármacos/química
7.
Int. j. med. surg. sci. (Print) ; 11(1): 1-11, mar. 2024. tab, ilus
Artigo em Inglês | LILACS | ID: biblio-1581141

RESUMO

INTRODUCTION: The relationships between wheat diet, sex hormone and the estrous cycle are important from the perspective of fertility. AIM: This study aims to investigate the effect of wheat diet on weight, estrous cycle, reproductive hormones and histology of the ovary of female Sprague-Dawley rats. METHODS: Prior to the test, vaginal smear was monitored daily for 16 days period to select females with normal (regular) estrous cycle. A total of twenty rats with regular estrous cycle weighing between 170-200 g were randomized into four sets of 5 animals each. Group A is the female control and was fed with rat chow, group B, C and D was given 40%, 60%, 100% of wheat diet respectively. The wheat diet was giving respectively for a period of 4 weeks. Estrous cycle pattern was monitored using the vaginal smear for 16 days. At the end of the experiment, the rats were sacrificed and the blood sample were taken for follicle stimulating hormone, luteinizing hormones, estradiol, and progesterone analysis. The histology of the ovary were carried out. RESULTS: The result showed that there was an increase in the weight of the rats that was fed with wheat and the increase was diet dependent. The wheat diets disrupt the order of appearance of normal estrous cycle stages, hence; there was no constancy in the frequency of all cycle stages in the wheat groups, mostly the 100% wheat group. No significant endocrine or histological differences noticed between control and wheat diets groups. Therefore photomicrograph of wheat diet shows large corpus luteum, thick germinal epithelium, zona granulosa and oocyte. CONCLUSION: Wheat diets disrupt the estrous cycle of the rats; however no adverse effect was noticed on the circulating reproductive hormones and histology of the ovary. However, high consumption of wheat should be taken with precaution.


INTRODUCCIÓN: Las relaciones entre la dieta de trigo, la hormona sexual y el ciclo estral son importantes desde el punto de vista de la fertilidad. OBJETIVO: Este estudio tiene como objetivo investigar el efecto de la dieta de trigo sobre el peso, el ciclo estral, las hormonas reproductivas y la histología del ovario de ratas hembras de Sprague-Dawley. MÉTODOS: Antes de la prueba, se monitoreó diariamente el frotis vaginal durante un período de 16 días para seleccionar mujeres con ciclo estral normal (regular). Un total de veinte ratas con ciclo estral regular que pesaban entre 170 y 200 g fueron asignadas al azar en cuatro grupos de 5 animales cada uno. El grupo A es el control femenino y fue alimentado con comida para ratas, los grupos B, C y D recibieron 40%, 60%, 100% de dieta de trigo respectivamente. La dieta de trigo se administró respectivamente durante un período de 4 semanas. El patrón del ciclo estral se controló mediante frotis vaginal durante 16 días. Al final del experimento, las ratas fueron sacrificadas y se tomó la muestra de sangre para el análisis de la hormona estimulante del folículo, las hormonas luteinizantes, el estradiol y la progesterona. Se realizó la histología del ovario. RESULTADOS: se observó un aumento en el peso de las ratas que fueron alimentadas con trigo y el aumento fue dependiente de la dieta. Las dietas de trigo alteran el orden de aparición de las etapas normales del ciclo estral, por lo tanto, no hubo constancia en la frecuencia de todas las etapas del ciclo en los grupos de trigo, principalmente en el grupo de trigo 100%. No se observaron diferencias endocrinas o histológicas significativas entre los grupos de dietas control y de trigo. Por lo tanto , la fotomicrografía de la dieta de trigo muestra un gran cuerpo lúteo, epitelio germinal grueso, zona granulosa y ovocito. CONCLUSIÓN: Las dietas de trigo alteran el ciclo estral de las ratas; sin embargo, no se observaron efectos adversos sobre las hormonas reproductivas circulantes ni sobre la histología del ovario. Los resultados sugieren que el alto consumo de trigo debe tomarse con precaución.


Assuntos
Animais , Feminino , Ratos , Hormônios Esteroides Gonadais/fisiologia , Triticum/química , Ratos , Triticum/metabolismo , Extratos Vegetais/farmacologia , Extratos Vegetais/química , Ciclo Estral , Dieta Baseada em Plantas , Histologia
8.
Food Chem ; 430: 137037, 2024 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-37541040

RESUMO

The microbial consortia of lactic acid bacteria and yeast of sourdough can partially degrade gluten subunits associated with wheat-related diseases. This study evaluated how sourdough fermentation interferes with wheat protein profiles and if it can be related to the reduction expression of allergenic proteins. Samples from five bread doughs (Saccharomyces cerevisiae -C1; chemical acidification -C2, and three sourdoughs formulations -S1, S2, and S3) were sequentially extracted, digested, and submitted to shotgun label-free proteomic analysis. Eight-five proteins were identified as allergenic, mainly belonging to gliadin fraction, including seven containing the 33-mer peptide sequence. The highest immunogenic potential was found in dough C1 and S3, while the least reactive group consisted of S1 and C2. The two folds down expression of an α-gliadin containing the 33-mer sequence corroborates this. This finding may indicate the role of organic acids produced by the microbiota sourdough type II during fermentation in changing the protein profile.


Assuntos
Alérgenos , Alimentos Fermentados , Alérgenos/análise , Triticum/metabolismo , Fermentação , Proteômica , Gliadina/metabolismo , Saccharomyces cerevisiae/metabolismo , Pão/análise , Farinha/análise , Microbiologia de Alimentos
9.
Plant Signal Behav ; 18(1): 2219837, 2023 Dec 31.
Artigo em Inglês | MEDLINE | ID: mdl-37294039

RESUMO

A field experiment was carried out to quantify the effect of a native bacterial inoculant on the growth, yield, and quality of the wheat crop, under different nitrogen (N) fertilizer rates in two agricultural seasons. Wheat was sown under field conditions at the Experimental Technology Transfer Center (CETT-910), as a representative wheat crop area from the Yaqui Valley, Sonora México. The experiment was conducted using different doses of nitrogen (0, 130, and 250 kg N ha-1) and a bacterial consortium (BC) (Bacillus subtilis TSO9, B. cabrialesii subsp. tritici TSO2T, B. subtilis TSO22, B. paralicheniformis TRQ65, and Priestia megaterium TRQ8). Results showed that the agricultural season affected chlorophyll content, spike size, grains per spike, protein content, and whole meal yellowness. The highest chlorophyll and Normalized Difference Vegetation Index (NDVI) values, as well as lower canopy temperature values, were observed in treatments under the application of 130 and 250 kg N ha-1 (the conventional Nitrogen dose). Wheat quality parameters such as yellow berry, protein content, Sodium dodecyl sulfate (SDS)-Sedimentation, and whole meal yellowness were affected by the N dose. Moreover, the application of the native bacterial consortium, under 130 kg N ha-1, resulted in a higher spike length and grain number per spike, which led to a higher yield (+1.0 ton ha-1 vs. un-inoculated treatment), without compromising the quality of grains. In conclusion, the use of this bacterial consortium has the potential to significantly enhance wheat growth, yield, and quality while reducing the nitrogen fertilizer application, thereby offering a promising agro-biotechnological alternative for improving wheat production.


Assuntos
Nitrogênio , Triticum , Triticum/metabolismo , Nitrogênio/metabolismo , Fertilizantes/análise , México , Grão Comestível/metabolismo , Clorofila/metabolismo
10.
Braz J Biol ; 82: e264216, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36383797

RESUMO

In 2017-2019, we conducted the field and vegetation experiments at the field station of Russian State Agrarian University, Moscow Timiryazev Agricultural Academy to study the effect of sodium selenite on the yield and grain quality indicators of white lupine, Dega variety, and spring wheat, Yubileynaya-80 variety. The best way found to use selenium is to spray vegetative plants with 0.01% aqueous sodium selenite solution. The studies have shown an increase in grain yield by 15-17%, crude protein content by 9-15% and crude fat content by 5-7% when treated with sodium selenite. The obtained grain yield of white lupine has a higher feed and nutritional value and is suitable for feeding animals and preparing various types of feed and feed additives. The optimal way to use selenium is spraying vegetative plants before shooting. Treatment with sodium selenite contributes to an increase in wheat yield by 1.5 times. We have established the positive effect of sodium selenite on the quality indicators of wheat grain. An increase in the content of raw gluten and glassiness of grain has been noted, which determines high bread-making qualities.


Assuntos
Lupinus , Selênio , Animais , Triticum/metabolismo , Lupinus/metabolismo , Selenito de Sódio/metabolismo , Selenito de Sódio/farmacologia , Selênio/metabolismo , Pão
11.
PLoS One ; 17(4): e0266368, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35421137

RESUMO

Wheat crop is very sensitive to osmotic stress conditions. As an abiotic stress, drought may exert a considerable effect on the levels of specialized metabolites in plants. These metabolites may exert beneficial biological activities in the prevention or treatment of disorders linked to oxidative stress in plants and humans. Furthermore, osmoprotector accumulation helps wheat to increase the maintenance of osmotic balance. Therefore, identifying wheat genotypes with better drought tolerance is extremely important. In this sense, this research aimed to understand agronomic, physiological and biochemical responses of spring wheat strains and cultivars to drought stress, under field conditions, and jointly select strains via multi-trait index. We evaluated agronomic, physiological and biochemical variables in 18 genotypes under field condition. The results demonstrated that all variables were affected by the drought. Most genotypes were significantly reduced in grain yield, except VI_14774, VI_14668, VI_9007 and TBIO_ATON. The variables related to photosynthesis were also affected. An increase above 800% was observed in proline contents in genotypes under drought. Sodium and potassium also increased, mainly for VI_131313 (Na), while VI_130758 and VI_14774 presented increased K. We evaluated the antioxidant potential of the different strains and the total content of phenolic compounds. The most drought-responsive genotypes were BRS_264, VI_14050 and VI_14426. Reduced grain yield and photosynthetic variables, and increased specialized metabolism compounds are due to plant defense mechanisms against drought conditions. Furthermore, variation in genotypes can be explained by the fact that each plant presents a different defense and tolerance mechanism, which may also occur between genotypes of the same species. Four strains were selected by the multivariate index: VI_14055, VI_14001, VI_14426 and VI_1466. Such results allow us to predict which genotype(s) performed best in semi-arid environments and under climatic fluctuations.


Assuntos
Secas , Triticum , Antioxidantes/metabolismo , Genótipo , Humanos , Fotossíntese/genética , Estresse Fisiológico/genética , Triticum/metabolismo
12.
J Sci Food Agric ; 102(5): 1927-1938, 2022 Mar 30.
Artigo em Inglês | MEDLINE | ID: mdl-34510460

RESUMO

BACKGROUND: A decrease in rainfall is one of the main constraints on wheat production, although the association of wheat with arbuscular mycorrhizal fungi (AMF) may be an alternative for crop production under drought conditions. In the present study, we used three wheat cultivars (Purple, Ilustre and Maxi Baer) inoculated with two AMF strains, one obtained from the hyperarid Atacama Desert (northern Chile; Fm) and the other obtained from southern Chile (Cc). Plants were maintained under two irrigation conditions (normal irrigation and drought) and the physiological behaviour and enzymatic and nonenzymatic antioxidant activities in the shoots were determined. In addition, the phenolic compounds were identified by high-performance liquid chromatography-dioide array detection-electrospray ionization-tandem mass spectrometry and quantified. RESULTS: AMF colonization produced higher levels of efficiency of photosystem II and photosynthetic pigments. High values of catalase in Purple-Cc, ascorbate peroxidase in Purple-Cc, glutathione reductase in Maxi-Cc and superoxide dismutase in Purple-Cc, all under stress, were registered. Of the inoculated cultivars, Purple-Cc showed the highest flavonoid levels, whereas hydroxycinnamic acids were higher in Maxi-Fm without drought, with apigenin and luteolin being the most abundant. High levels of phenols were present in the Ilustre-Fm plants without drought. Under normal irrigation, high levels of antioxidant activity were registered in the AMF treatments, whereas, under stress conditions, in general, high values were observed under the Fm inoculation. CONCLUSION: Our results showed that the greatest antioxidant activity and phenolic content occurred in wheat plants inoculated with AMF, indicating their influence on coping with water stress, which is of importance in vast areas where global climate change is resulting in diminished rainfall. © 2021 Society of Chemical Industry.


Assuntos
Micorrizas , Antioxidantes/metabolismo , Secas , Micorrizas/fisiologia , Fotossíntese/fisiologia , Triticum/metabolismo
13.
J Sci Food Agric ; 102(1): 407-416, 2022 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-34143900

RESUMO

BACKGROUND: Hydric stress affects the production of wheat (Triticum aestivum L.) worldwide, making some tools necessary to cope with the decrease in rainfall. A sustainable alternative is the use of arbuscular mycorrhizal fungi (AMF) as biofertilisers. Here, we analysed the effects of AMF strains adapted or non-adapted to hyper-arid conditions on the phenolic profiles and antioxidant activities of wheat grains from two cultivars with contrasting tolerance to osmotic stress (Ilustre, moderately tolerant; and Maxi, tolerant) grown with and without hydric stress. RESULTS: Eight phenolic compounds were detected, apigenin-C-pentoside-C-hexoside I being the most abundant and showing an increase of 80.5% when inoculated with the fungus Funneliformis mosseae (FM) obtained from Atacama Desert under normal irrigation with respect to non-mycorrhizal (NM) plants. NM treatments were associated with higher grain yields. FM showed a noticeable effect on most phenolic compounds, with an increase up to 30.2% in apigenin-C-pentoside-C-hexoside III concentration under hydric stress with respect to normal irrigation, being also responsible for high antioxidant activities such as ABTS (2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) and DPPH (2,2-diphenyl-1-picrylhydrazyl) activities. CONCLUSION: Inoculation with FM adapted to hydric stress produced improvements in phenolics composition and antioxidant activities in grains from wheat plants growing under hydric stress conditions, improving their food quality and supporting the development of further studies to determine whether the use of adapted AMF could be a realistic tool to improve grain quality in a scenario of increasing hydric stress conditions. © 2021 Society of Chemical Industry.


Assuntos
Inoculantes Agrícolas/fisiologia , Antioxidantes/química , Fungos/fisiologia , Micorrizas/fisiologia , Fenóis/química , Sementes/química , Triticum/crescimento & desenvolvimento , Antioxidantes/metabolismo , Fenóis/metabolismo , Sementes/crescimento & desenvolvimento , Sementes/metabolismo , Sementes/microbiologia , Triticum/química , Triticum/metabolismo , Triticum/microbiologia
14.
Int J Mol Sci ; 22(17)2021 Aug 31.
Artigo em Inglês | MEDLINE | ID: mdl-34502363

RESUMO

Stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), is one of the most important diseases of wheat worldwide. To understand the worldwide distribution of its molecular groups, as well as the diversity, differentiation, and migration of the Pst populations, 567 isolates collected from nine countries (China, Pakistan, Italy, Egypt, Ethiopia, Canada, Mexico, Ecuador, and the U.S.) in 2010-2018 were genotyped using 14 codominant simple sequence repeat markers. A total of 433, including 333 new multi-locus genotypes (MLGs), were identified, which were clustered into ten molecular groups (MGs). The MGs and country-wise populations differed in genetic diversity, heterozygosity, and correlation coefficient between the marker and virulence data. Many isolates from different countries, especially the isolates from Mexico, Ecuador, and the U.S., were found to be identical or closely related MLGs, and some of the MGs were present in all countries, indicating Pst migrations among different countries. The analysis of molecular variance revealed 78% variation among isolates, 12% variation among countries, and 10% variation within countries. Only low levels of differentiation were found by the pairwise comparisons of country populations. Of the 10 MGs, 5 were found to be involved in sexual and/or somatic recombination. Identical and closely related MLGs identified from different countries indicated international migrations. The study provides information on the distributions of various Pst genetic groups in different countries and evidence for the global migrations, which should be useful in understanding the pathogen evolution and in stressing the need for continual monitoring of the disease and pathogen populations at the global scale.


Assuntos
Puccinia/genética , Puccinia/metabolismo , Canadá , China , Equador , Egito , Etiópia , Evolução Molecular , Variação Genética/genética , Genética Populacional , Genótipo , Itália , México , Paquistão , Fenótipo , Doenças das Plantas/genética , Puccinia/patogenicidade , Triticum/genética , Triticum/metabolismo , Estados Unidos , Virulência
15.
Food Chem ; 360: 129993, 2021 Oct 30.
Artigo em Inglês | MEDLINE | ID: mdl-33984560

RESUMO

The influence of the pasta preparation stages on starch, proteins, and water structures of semolina and chickpea pasta was studied. The hydrated starch structures (995/1022 FTIR ratio) increased in semolina and reduced in chickpea pasta. The processing stages in semolina pasta led to a significant increase of ß-sheet structures (~50% to ~68%). The ß-sheet structures content in chickpea pasta was lower (~52%), and was most affected by sheeting and cooking. The water structure was assessed by the analysis of the OH fingerprint FTIR region (3700-2800 cm-1) and showing that water molecules (~90%) are strongly and moderately bound. The chickpea pasta displayed the highest content of strongly bonded water (about 55%) in contrast to the semolina pasta (~48%). A principal component analysis showed that the molecular organization of semolina pasta was mostly affected by dough formation and cooking; the molecular organization of chickpea pasta was determined by the cooking stage.


Assuntos
Cicer/metabolismo , Culinária , Proteínas de Plantas/química , Amido/química , Triticum/metabolismo , Água/química , Cicer/química , Farinha/análise , Proteínas de Plantas/metabolismo , Análise de Componente Principal , Conformação Proteica em Folha beta , Solubilidade , Espectroscopia de Infravermelho com Transformada de Fourier , Triticum/química
16.
J Sci Food Agric ; 101(13): 5599-5607, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-33709436

RESUMO

BACKGROUND: The majority of studies with essential oils in foods focus mainly on improving the shelf life of products; however, the present study goes further and demonstrates not only the effect of essential oil on conservation properties, but also the effect of free and encapsulated orange essential oil (OEO) on the technological, sensorial and digestibility properties of bakery products. RESULTS: OEO was encapsulated into ß-cyclodextrin (ß-CD) by inclusion complex formation (ß-CD/OEO 97.4% of encapsulation efficiency). OEO demonstrated in vitro antifungal activity against Aspergillus flavus (inhibition zone of 11.33 mm on mycelial growth). In situ antifungal activity against A. flavus confirmed that free OEO can effectively delay the fungal growth, unlike encapsulated OEO. Regarding texture profile and starch digestibility: cake with ß-CD/OEO showed lower hardness (31.64 N) and lower starch digestibility (69.10%) than cake with free OEO (44.30 N; 82.10%, respectively) and the addition of OEO (both free and encapsulated) decreased the adhesiveness of the cakes. Cake with free OEO showed a higher intensity of orange aroma, being preferred by 60% of panelists, whereas cake with ß-CD/OEO presented a very slight orange taste and aroma. CONCLUSION: The encapsulation of OEO into ß-CD improved the crumb texture of cakes and promoted a lower starch digestibility in the cakes. On the other hand, the encapsulation process was not effective under the conditions tested (OEO concentration and baking temperatures), compromising the action of the OEO as a natural flavoring and preservative agent. © 2021 Society of Chemical Industry.


Assuntos
Aspergillus flavus/crescimento & desenvolvimento , Aditivos Alimentares/química , Óleos Voláteis/química , Óleos de Plantas/química , Triticum/microbiologia , Antifúngicos/química , Antifúngicos/metabolismo , Antifúngicos/farmacologia , Aspergillus flavus/efeitos dos fármacos , Digestão , Aditivos Alimentares/metabolismo , Aditivos Alimentares/farmacologia , Humanos , Odorantes/análise , Óleos Voláteis/metabolismo , Óleos Voláteis/farmacologia , Óleos de Plantas/metabolismo , Óleos de Plantas/farmacologia , Amido/metabolismo , Paladar , Triticum/metabolismo
17.
Methods Mol Biol ; 2212: 37-44, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33733348

RESUMO

Variable selection is an important procedure to select relevant features from large datasets in optimization problems. The use of epistasis concepts becomes an alternative to assess the gene (variable) interdependence and select the most significative variables. This chapter describes the Epistasis-based Feature Selection Algorithm (EbFSA). Such implementation was recently proposed in a doctorate thesis from Computer Science. It has been applied to solve multivariate calibration problems with multiple linear regression and demonstrated superiority over traditional techniques by selecting the smallest number of variables as well as obtaining the best model predictive ability.


Assuntos
Algoritmos , Epistasia Genética , Proteínas de Plantas/genética , Sementes/genética , Triticum/genética , Conjuntos de Dados como Assunto , Expressão Gênica , Modelos Estatísticos , Análise Multivariada , Proteínas de Plantas/metabolismo , Sementes/metabolismo , Espectrofotometria Infravermelho , Triticum/metabolismo
18.
New Phytol ; 230(2): 629-640, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-33124693

RESUMO

Wheat is the most widely grown crop globally, providing 20% of all human calories and protein. Achieving step changes in genetic yield potential is crucial to ensure food security, but efforts are thwarted by an apparent trade-off between grain size and number. Expansins are proteins that play important roles in plant growth by enhancing stress relaxation in the cell wall, which constrains cell expansion. Here, we describe how targeted overexpression of an α-expansin in early developing wheat seeds leads to a significant increase in grain size without a negative effect on grain number, resulting in a yield boost under field conditions. The best-performing transgenic line yielded 12.3% higher average grain weight than the control, and this translated to an increase in grain yield of 11.3% in field experiments using an agronomically appropriate plant density. This targeted transgenic approach provides an opportunity to overcome a common bottleneck to yield improvement across many crops.


Assuntos
Expressão Ectópica do Gene , Triticum , Produtos Agrícolas/metabolismo , Grão Comestível/metabolismo , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Sementes/genética , Sementes/metabolismo , Triticum/genética , Triticum/metabolismo
19.
FEMS Microbiol Lett ; 368(1)2021 01 26.
Artigo em Inglês | MEDLINE | ID: mdl-33338214

RESUMO

Solid-state fermentation with Agaricus brasiliensis and Agaricus bisporus on whole grain wheat was carried out. Phenolic compounds and antioxidant properties of fermented wheat were determined. The results showed that the maximum values of polyphenols contents in wheat fermented with A. brasiliensis and A. bisporus reached, respectively (3.16 ± 0.21) and (3.93 ± 0.23) mg GAE/g, which were 2.90 and 3.61 times of unfermented control. By employing ultra performance liquid chromatography coupled to mass spectrometry (UPLC-MS), 18 kinds of phenolic compounds were identified from fermented wheat. Compared with control, only 4-hydroxy-benzaldehyde was the same compound. It indicated that fermentation with the two fungi changed polyphenols contents and phenolic compounds composition in wheat to a great extent. Among these phenolic compounds, except for 4-hydroxy-benzaldehyde, 4-hydroxy-benzoic acid and ß-N-(γ-glutamyl)-4-formylphenylhydrazine, other 15 kinds of phenolic compounds were first identified from mushroom samples (including fruit bodies, mycelia and fermentation products). DPPH radical scavenging capacity, reducing power, ferrous ion chelating ability and inhibition of lipid peroxidation of fermented wheat were significantly stronger than control (P < 0.05).


Assuntos
Agaricus/metabolismo , Antioxidantes/metabolismo , Fenóis/metabolismo , Triticum/microbiologia , Antioxidantes/química , Fermentação , Cromatografia Gasosa-Espectrometria de Massas , Fenóis/química , Triticum/metabolismo
20.
J Sci Food Agric ; 101(7): 2869-2876, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-33155278

RESUMO

BACKGROUND: There is a growing interest in increasing dietary fiber (DF) consumption because of the health benefits associated with this nutrient. Pulses are considered a good source of non-digestible carbohydrates. The aim of this study was to investigate the possibility of substituting semolina with chickpea flour to increase indigestible carbohydrate content without altering the texture of the pasta. RESULTS: Pasta was prepared by extruding semolina-chickpea blends. The protein and DF content in the cooked pasta increased with the chickpea level, with an important contribution of resistant starch (RS) to the DF values. The optimum cooking time decreased as the chickpea content increased, which was related to the degree of starch gelatinization of the raw pasta. The in vitro digestible starch content decreased with the chickpea substitution level, concomitant with the increase in RS content. In general, the texture of the chickpea-containing pasta was similar to that of semolina pasta. CONCLUSIONS: Pending acceptability studies on these pastas may grant their promotion as good fiber sources, probably helpful in the fight against obesity and diet-related non-communicable diseases. © 2020 Society of Chemical Industry.


Assuntos
Cicer/química , Amido/química , Triticum/química , Cicer/metabolismo , Culinária , Fibras na Dieta/análise , Fibras na Dieta/metabolismo , Farinha/análise , Aditivos Alimentares/química , Aditivos Alimentares/metabolismo , Manipulação de Alimentos , Humanos , Amido/metabolismo , Paladar , Triticum/metabolismo
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA