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1.
Pest Manag Sci ; 81(1): 255-265, 2025 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-39350697

RESUMO

BACKGROUND: Climate change has far-reaching effects on food security and agriculture, affecting crop yields and food distribution. Agriculture relies heavily on water for irrigation and production, making it vulnerable to water scarcity. Additionally, climate change can affect crop pest insects, leading to increased global crop losses, particularly in cereals, an important component of the human diet. Aphids are major crop pests and have a symbiotic relationship with bacterial endosymbionts that can contribute to their success as pests under a climate change scenario. To test the effect of drought on aphids, we examined varying levels of water deficit and endosymbiont composition on the grain aphid (Sitobion avenae) performance on wheat under controlled laboratory conditions. We measured the intrinsic rate of population increase (rm), the body weight of adult aphids, and the pre-reproductive period for different genotypes of the grain aphid (including Chilean superclones) under different irrigation regimes. We also analyzed the relative abundance of their endosymbionts under the different water treatments. RESULTS: Our findings revealed that water deficit affects each aphid genotype differently, impacting various traits. For instance, the body weight of adult aphids was notably affected by different water treatments, with aphids grown under intermediate water deficit (IW) being significantly bigger. The relative abundance of endosymbionts also varied among genotypes and water treatments-specifically Regiella insecticola had a noticeably higher abundance under IW (P < 0.05). CONCLUSION: This study provides valuable insights into the impact of water deficit on aphid performance and the role of endosymbionts in mitigating the effects of water deficit. © 2024 Society of Chemical Industry.


Assuntos
Afídeos , Simbiose , Triticum , Afídeos/fisiologia , Afídeos/microbiologia , Animais , Triticum/microbiologia , Secas , Água
2.
Arch Insect Biochem Physiol ; 117(2): e22154, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-39397367

RESUMO

The English grain aphid, Sitobion avenae, is a significant agricultural pest affecting wheat, barley, and oats. In Chile, the most prevalent and persistent clone (superclone) of S. avenae harbors the facultative endosymbiont bacterium Regiella insecticola. To determine the role of this bacterium in the reproductive success of this superclone, the presence of R. insecticola was manipulated to assess its impact on (1) the reproductive performance of this clone on two host plant species (wheat and barley), (2) the production of winged morphs, (3) changes in the insects' proteomic profiles, and (4) the root/shoot ratio of plant. It was found that the reproductive performance of this S. avenae superclone varied across host plants, depending on the presence of the facultative bacterial endosymbiont. Aphids infected with R. insecticola showed higher reproductive success on wheat, while the opposite effect was observed on barley. Aphid biomass was greater when infected with R. insecticola, particularly on barley. Additionally, aphids harboring R. insecticola exhibited a higher proportion of winged individuals on both host plants. Protein regulation in aphids on wheat was lower compared to those on barley. A higher root/shoot biomass ratio was observed in wheat plants compared to barley when infested by R. insecticola-infected aphid. Thus, R. insecticola significantly influences the reproductive performance and proteomic profile of a S. avenae superclone, with these effects shaped by the host plant. This suggests that the interaction between the host plant and the facultative endosymbiont contributes to the ecological success of this superclone.


Assuntos
Afídeos , Hordeum , Reprodução , Simbiose , Triticum , Animais , Afídeos/microbiologia , Afídeos/fisiologia , Triticum/microbiologia , Hordeum/microbiologia , Proteoma/metabolismo , Proteômica , Proteínas de Insetos/metabolismo , Enterobacteriaceae , Chile
3.
Braz J Biol ; 84: e286189, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39230085

RESUMO

Drought is a primary ecological stress limiting wheat yield in water-deficient regions. Conducting targeted genetic selection of wheat cultivars can expedite the adaptation process of wheat to the climatic conditions of the region, allowing for the identification of high-yielding varieties with stable genetic traits. This study investigated the impact of the TaGW8 and TaGS3A genes, known for their contribution to wheat productivity. The effective productivity genes TaGW8-B1b/B1a and the TaGS5-3A-T genome exert a 32.8% influence on the variability of the 1000 grain weight (TGW) trait. This influence stems from both individual genes and their interactions, with at least 17.5% of TGW variability explained by the gene combinations examined in the study. Notably, the TaGS5-3A-T gene exhibits a significant positive correlation with total yield, exceeding 63%. The integration of these productivity genes, based on field phenotypic data, has resulted in an overall yield increase of selected samples by 0.8 tons/ha compared to the country's average multi-year indicator.


Assuntos
Genes de Plantas , Triticum , Triticum/genética , Cazaquistão , Fenótipo , Estações do Ano , Genótipo , Secas
4.
Vet Res Commun ; 48(6): 3847-3857, 2024 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-39316351

RESUMO

Zearalenone (ZEA) is a mycotoxin produced by Fusarium species, and cause contamination of food and feed, with impacts in animal production and in food production chain. Effective detoxifying methods, such as biodegradation, are therefore required. This study aimed to isolate microorganisms and screen ZEA detoxifying strains. As a result, 197 microorganisms were isolated, and six were initially selected after colorimetric screening. ZEA (1 µg/mL) was added to culture media, and after 24 h, all six microorganisms were able to degrade ZEA, without the formation of α-ZOL. One isolate eliminated ~ 99% of ZEA and was identified as Bacillus velezensis CL197. ZEA metabolites produced by the bacteria were evaluated, and no metabolites with greater or similar toxicity than ZEA were detected. This strain was applied to swine in vitro digestion, and up to 64% of ZEA was degraded. B. velezensis CL197 significantly degraded ZEA, demonstrating potential to be used as a detoxifying agent in the food production chain as a biocontrol agent.


Assuntos
Bacillus , Triticum , Zearalenona , Zearalenona/metabolismo , Bacillus/metabolismo , Triticum/microbiologia , Animais , Suínos , Ração Animal/análise , Ração Animal/microbiologia
5.
An Acad Bras Cienc ; 96(suppl 1): e20231255, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39319941

RESUMO

This study examined the effects of wheat and corn gluten added to lamb diets as a unilateral protein source on some microbial and chemical properties of Musculus Longismus dorsi (LD), determination of intramuscular and tail fat profile. It was found that TBARS levels in LD muscle on the days of storage were highest in the wheat gluten-treated groups (p<0.01). It was found that the changes in pH values in LD muscle were different on days (p<0.05). It was found that the change of L*, a ve b values on days differed between groups during the storage period (p<0.05). It was found that the numbers of TMAB, Enterobacteriaceae, Lactobacillus spp., Pseudomonas spp. and TPAB changed significantly (p<0.05) during the storage process. While a significant difference was found between the MUFA levels of dorsal muscle intramuscular adipose tissue of the groups (p<0.05). As a result, it was determined that the metabolic differences of the one-way protein sources fed to the lambs in the digestive system and other organs had an effect on the meat quality, intramuscular fat and fatty acid profile of the tail.


Assuntos
Ração Animal , Ácidos Graxos , Glutens , Músculo Esquelético , Triticum , Zea mays , Animais , Zea mays/química , Triticum/química , Ácidos Graxos/análise , Músculo Esquelético/química , Ovinos , Glutens/análise , Ração Animal/análise , Cauda , Carne/análise , Concentração de Íons de Hidrogênio
6.
Int J Mol Sci ; 25(18)2024 Sep 20.
Artigo em Inglês | MEDLINE | ID: mdl-39337614

RESUMO

Rhyzopertha dominica causes significant economic losses in stored cereals. Insects' digestive tract microbiome is crucial for their development, metabolism, resistance, and digestion. This work aimed to test whether the different chemical properties of different wheat and barley grain cultivars cause disturbances in insect foraging and rearrangements of the structure of the R. dominica microbiome. The results indicated that grain cultivars significantly influence the microbiome, metabolism, and insect foraging. Most observed traits and microbiome structures were not correlated at the species level, as confirmed by ANOSIM (p = 0.441). However, the PLS-PM analysis revealed significant patterns within barley cultivars. The study found associations between C18:2 fatty acids, entomopathogenic bacteria, an impaired nitrogen cycle, lysine production of bacterial origin, and insect feeding. The antioxidant effects also showed trends towards impacting the microbiome and insect development. The findings suggest that manipulating grain chemical properties (increasing C18:2 and antioxidant levels) can influence the R. dominica microbiome, disrupting their foraging behaviours and adaptation to storage environments. This research supports the potential for breeding resistant cereals, offering an effective pest control strategy and reducing pesticide use in food production.


Assuntos
Grão Comestível , Grão Comestível/microbiologia , Grão Comestível/parasitologia , Animais , Triticum/microbiologia , Triticum/parasitologia , Microbiota , Hordeum/microbiologia , Microbioma Gastrointestinal , Bactérias/metabolismo , Besouros
7.
Braz J Biol ; 84: e279154, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39109712

RESUMO

An increase in genetic diversity of bread wheat caused by spring x winter forms leads to an alteration of genetic control of maturity time. Maturity time (MAT) is one of major yield components in wheat, which has two components: the heading date (HD) and grain-filling period (GFP). Using the Illumina Infinium 25k platform we analyzed the genetic control of the HD, GFP and MAT in the F2 and F2:3 populations from a cross between late-ripening spring/winter line 124-1 and spring wheat cultivar Novosibirskaya 31, possessing the same allelic composition of the VRN1 and PPD-D1 genes. The phenotypic evaluation of the populations studied was performed during three years. A total of 17 QTLs were mapped, out of which 4 QTLs for MAT or its components were confirmed over two years. Two common MAT and HD QTLs were identified on the 4A chromosome, and two loci controlling GFP and MAT were found on 6B chromosome. An environmentally stable HD QTL QHd.icg-7B.1 was associated with the FT-B1 gene having a non-synonymous polymorphism [G/C] in its coding region. A novel НD QTL was identified on 7D chromosome. QTL dissection allowed to propose putative genes for QMat.icg4-A and QMat.icg6-B, namely the SPL family gene (TraesCS4A02G359500) and the TCP transcription factor (TraesCS6B02G462100), respectively. The results of this study provide information for further investigation into wheat development.


Assuntos
Fenótipo , Locos de Características Quantitativas , Triticum , Triticum/genética , Triticum/crescimento & desenvolvimento , Locos de Características Quantitativas/genética , Mapeamento Cromossômico , Grão Comestível/genética , Fatores de Tempo , Estações do Ano
8.
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
9.
Braz J Biol ; 84: e285326, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39166693

RESUMO

Drought-induced risk endangers farmers in arid and semi-arid regions. Insurance is recognized as an appropriate policy alternative to support farmers facing with financial losses associated with production reduction. In this context, present study developed an ex ante index-based insurance program to deal with drought-induced risk of production losses. We applied this model to wheat growers in Iran. After the calibration of the contract parameters, an insurance scheme was optimized and tested. We showed that optimal insurance contracts generate low gain of certain equivalent income, high compensation, and a high basis risk. The best contract was not proportional to the complexity of the proposed index. The insurance program studied is recommended as a proper alternative for currently applying yield insurance.


Assuntos
Agricultura , Triticum , Irã (Geográfico) , Agricultura/economia , Secas/economia , Humanos , Fazendeiros
10.
Environ Sci Pollut Res Int ; 31(39): 51344-51352, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-39110286

RESUMO

Insect growth regulators (IGRs) have been playing a major role in the effective management of a range of stored product insect pests including species that have developed resistance to major groups of insecticides, such as organophosphates (OPs) and synthetic pyrethroids (SPs). In the present study, we evaluated the efficacy of S-methoprene alone and in combination with piperonyl butoxide (PBO), an adjuvant component of insecticides for synergy, against two strains, Lab-S (susceptible) and Met-R (Methoprene resistant) of an economically important pest species, the lesser grain borer, Rhyzopertha dominica (F.) (Coleoptera: Bostrychidae). Adults of both Lab-S and Met-R strains were exposed to wheat treated with multiple concentrations of S-methoprene ranging from 0.001 to 0.01 and 10 to 60 mg/kg, respectively, alone and in combination with PBO. A variety of concentrations, including 0.27, 0.53, 0.80, and 1.07 g/kg, were evaluated for PBO. Mortality of adults and percent reduction in progeny were assessed after 14 and 65 days of treatment, respectively. As anticipated, the adult mortality rates of both strains were not significantly affected by S-methoprene alone. However, the number of progeny produced confirmed that the Met-R strain exhibited a high level of resistance to S-methoprene alone, with over 50 F1 progeny adults surviving in wheat treated with the maximal rate, 10 mg/kg. In contrast, the toxicity of S-methoprene was increased against the same resistant strain (Met-R), by 0.80 or 1.07 g/kg of PBO in combination treatment, resulting in a significant reduction in progeny numbers (25 adults per container). Although the tested concentrations of S-methoprene and PBO were well above the currently registered rate globally, our results highlight the fact that PBO enhances the toxicity of S-methoprene to some extent, reaffirming that the mode of action of the latter involves the inhibition of mixed-function oxidases (MFOs) and highlights the need for further research into developing potential binary or triplet formulations containing these two active ingredients (AIs).


Assuntos
Besouros , Inseticidas , Metoprene , Butóxido de Piperonila , Animais , Inseticidas/toxicidade , Besouros/efeitos dos fármacos , Triticum , Sinergistas de Praguicidas
11.
Neotrop Entomol ; 53(5): 1031-1044, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-39141218

RESUMO

Anastrepha fraterculus (Diptera: Tephritidae) is considered an important pest in Neotropical countries. The laboratory rearing of this species should reproduce conditions in nature; thus, special attention is required to the nutritional quality of diets for larval development. Protein components (wheat germ) are costly and account for most production costs in lab insect rearing. In this sense, this work aimed to identify ingredients to replace wheat germ, without compromising diet quality for the lab rearing of A. fraterculus. We tested diets composed of whole rice flour, corn flour, and a mixture of whole wheat flour + soybean flour as substitutes for wheat germ as well as a raw wheat germ diet, considered the control. The protein sources used in the larval diet influenced the biological performance of both the larval and adult stages of A. fraterculus during six generations. The diet containing corn flour and wheat germ showed similar results in the different developmental parameters. The diet with rice flour also provided adequate biological development for A. fraterculus throughout its life cycle and was nutritionally similar to the control. As it is local product, rice flour can replace wheat germ (costly imported product) in artificial diets for A. fraterculus, reducing production costs by roughly 30% without compromising the biological and nutritional parameters of the insects. Faced with this, the rice flour can be considered suitable for the mass rearing of A. fraterculus in the laboratory.


Assuntos
Dieta , Larva , Tephritidae , Triticum , Animais , Tephritidae/crescimento & desenvolvimento , Larva/crescimento & desenvolvimento , Farinha , Oryza , Ração Animal/análise , Proteínas Alimentares , Zea mays , Feminino , Glycine max , Masculino
12.
Fungal Genet Biol ; 174: 103924, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39094785

RESUMO

Fusarium head blight (FHB) is a major disease of wheat and barley worldwide and is caused by different species in the genus Fusarium, Fusarium graminearum being the most important. We conducted population genomics analyses using SNPs obtained through genotyping by sequencing of over 500 isolates of F. graminearum from the US Upper Midwest, New York, Louisiana, and Uruguay. PCA and STRUCTURE analyses group our isolates into four previously described populations: NA1, NA2, Southern Louisiana (SLA) and Gulf Coast (GC). Some isolates were not assigned to populations because of mixed ancestry. Population structure was associated with toxin genotype and geographic origin. The NA1, NA2, and SLA populations are differentiated (FST 0.385 - 0.551) but the presence of admixed isolates indicates that the populations are not reproductively isolated. Patterns of linkage disequilibrium (LD) decay suggest frequent recombination within populations. Fusarium graminearum populations from the US have great evolutionary potential given the high recombination rate and a large proportion of admixed isolates. The NA1, NA2, and Southern Louisiana (SLA) populations separated from their common ancestral population roughly at the same time in the past and are evolving with moderate levels of subsequent gene flow between them. Genome-wide selection scans in all three populations revealed outlier regions with the strongest signatures of recent positive natural selection. These outlier regions include many genes with unknown function and some genes with known roles in plant-microbe interaction, fungicide/drug resistance, cellular transport and genes that are related to cellular organelles. Only a very small proportion of outlier regions are shared as outliers among the three populations, suggesting unique host-pathogen interactions and environmental adaptation.


Assuntos
Fusarium , Desequilíbrio de Ligação , Doenças das Plantas , Polimorfismo de Nucleotídeo Único , Fusarium/genética , Fusarium/classificação , Fusarium/isolamento & purificação , Doenças das Plantas/microbiologia , Polimorfismo de Nucleotídeo Único/genética , Triticum/microbiologia , Genoma Fúngico/genética , América , Genótipo , Genômica , Metagenômica , Hordeum/microbiologia , Uruguai
13.
Food Res Int ; 191: 114609, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39059893

RESUMO

Food waste is responsible for the loss of 1.3 billion tons of food, some of which are related to by-products with great nutritional and energy potential that are still underexplored, such as safflower cake derived from the oil extraction industry. Therefore, the aim of this study was to evaluate the effects of incorporating safflower cake (Carthamus tinctorius) and the mixing method used to produce composite wheat-based flour in order to develop a new ingredient. The results were analyzed using ANOVA, and the Tukey test was applied at a significance level of 5 %. The composite flours obtained by the conventional mixing method showed, when compared to wheat flour, a higher concentration of proteins (+5g 100 g-1), minerals (+86 mg kg-1 of Fe, +30 mg kg-1 of Zn), phenolic compounds (15 mg GAE g-1), flavonoids (0.3 mg QE g-1), and lower oil absorption (-0.5 g oil g sample-1), making them suitable for hot flour-based sauces, salad dressings, frozen desserts, cookies and fried products. While extruded composite flours presented better homogenization, reduction of moisture (1 g 100 g-1), lipids (3 g 100 g-1), and mycotoxin concentrations, increased antioxidant activity (DPPH -0.07 IC50 mg/L and ORAC +9 µmol Trolox Eq/g), water absorption and solubility indexes, and oil absorption index, making it suitable for bakery products, meat, and dairy sausages. The developed composite flour proved to be a good nutritional ingredient; thus, its consumption can represent an important nutritional strategy with low production costs, as well as a sustainable solution, reducing food waste and, therefore, toward the concepts of the circular economy.


Assuntos
Carthamus tinctorius , Farinha , Manipulação de Alimentos , Farinha/análise , Carthamus tinctorius/química , Manipulação de Alimentos/métodos , Valor Nutritivo , Triticum/química , Ingredientes de Alimentos/análise , Fenóis/análise , Minerais/análise , Minerais/química , Flavonoides/análise
14.
Genes (Basel) ; 15(7)2024 Jul 07.
Artigo em Inglês | MEDLINE | ID: mdl-39062669

RESUMO

Wheat (Triticum aestivum L.) production is adversely impacted by Septoria nodorum blotch (SNB), a fungal disease caused by Parastagonospora nodorum. Wheat breeders are constantly up against this biotic challenge as they try to create resistant cultivars. The genome-wide association study (GWAS) has become an efficient tool for identifying molecular markers linked with SNB resistance. This technique is used to acquire an understanding of the genetic basis of resistance and to facilitate marker-assisted selection. In the current study, a total of 174 bread wheat accessions from South Asia and CIMMYT were assessed for SNB reactions at the seedling stage in three greenhouse experiments at CIMMYT, Mexico. The results indicated that 129 genotypes were resistant to SNB, 39 were moderately resistant, and only 6 were moderately susceptible. The Genotyping Illumina Infinium 15K Bead Chip was used, and 11,184 SNP markers were utilized to identify marker-trait associations (MTAs) after filtering. Multiple tests confirmed the existence of significant MTAs on chromosomes 5B, 5A, and 3D, and the ones at Tsn1 on 5B were the most stable and conferred the highest phenotypic variation. The resistant genotypes identified in this study could be cultivated in South Asian countries as a preventative measure against the spread of SNB. This work also identified molecular markers of SNB resistance that could be used in future wheat breeding projects.


Assuntos
Ascomicetos , Resistência à Doença , Estudo de Associação Genômica Ampla , Doenças das Plantas , Plântula , Triticum , Triticum/genética , Triticum/microbiologia , Resistência à Doença/genética , Ascomicetos/patogenicidade , Ascomicetos/genética , Doenças das Plantas/microbiologia , Doenças das Plantas/genética , Plântula/genética , Plântula/microbiologia , Estudo de Associação Genômica Ampla/métodos , Polimorfismo de Nucleotídeo Único , Locos de Características Quantitativas , Marcadores Genéticos , Genótipo
15.
Phytopathology ; 114(10): 2273-2286, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-38976565

RESUMO

Epidemiological studies to better understand wheat blast (WB) spatial and temporal patterns were conducted in three field environments in Bolivia between 2019 and 2020. The temporal dynamics of wheat leaf blast (WLB) and spike blast (WSB) were best described by the logistic model compared with the Gompertz and exponential models. The nonlinear logistic infection rates were higher under defined inoculation in experiments two and three than under undefined inoculation in experiment one, and they were also higher for WSB than for WLB. The onset of WLB began with a spatial clustering pattern according to autocorrelation analysis and Moran's index values, with higher severity and earlier onset for defined than for undefined inoculation until the last sampling time. The WSB onset did not start with a spatial clustering pattern; instead, it was detected later until the last sampling date across experiments, with higher severity and earlier onset for defined than for undefined inoculation. Maximum severity (Kmax) was 1.0 for WSB and less than 1.0 for WLB. Aggregation of WLB and WSB was higher for defined than for undefined inoculation. The directionality of hotspot development was similar for both WLB and WSB, mainly occurring concentrically for defined inoculation. Our results show no evidence of synchronized development but suggest a temporal and spatial progression of disease symptoms on wheat leaves and spikes. Thus, we recommend that monitoring and management of WB should be considered during early growth stages of wheat planted in areas of high risk.


Assuntos
Doenças das Plantas , Triticum , Triticum/microbiologia , Triticum/crescimento & desenvolvimento , Doenças das Plantas/microbiologia , Doenças das Plantas/estatística & dados numéricos , Bolívia , Folhas de Planta/microbiologia , Análise Espaço-Temporal
16.
Mycotoxin Res ; 40(4): 631-639, 2024 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-39078561

RESUMO

The debranning process, at an industrial scale, was applied to grains of two wheat cultivars to determine its effect on Fusarium mycotoxin content and antioxidant activity. Grain samples from the BRS Marcante and BRS Reponte wheat cultivars, naturally contaminated by Fusarium, were used in the study. The dry wheat samples were processed on the polisher once or twice and evaluated by hardness index, chemical composition (moisture, protein, and ash), deoxynivalenol (DON) and zearalenone (ZON) levels, phenolic content, and antioxidant activity. In the BRS Marcante cultivar, the debranning process only slightly reduced the DON and ZON contents in whole-wheat flours compared with the previous cleaning treatment (no-debranned). In the BRS Reponte cultivar, the DON concentration decreased by 36% at a debranning ratio of 5%, obtained by polishing, compared with prior cleaning treatment (no-debranned). In addition, the polishing reduced the ZON level by 56% compared with the cleaned wheat. The debranning process did not reduce the antioxidant capacity. Therefore, debranning is a suitable technology to obtain safer and healthier food by minimizing the mycotoxin content and retaining antioxidant capacity.


Assuntos
Antioxidantes , Fusarium , Micotoxinas , Fenóis , Triticum , Triticum/química , Antioxidantes/análise , Fenóis/análise , Micotoxinas/análise , Zearalenona/análise , Tricotecenos/análise , Manipulação de Alimentos/métodos , Contaminação de Alimentos/análise , Farinha/análise
17.
Public Health Nutr ; 27(1): e159, 2024 Jun 03.
Artigo em Inglês | MEDLINE | ID: mdl-38825723

RESUMO

OBJECTIVE: To simulate the impact on calcium intake - effectiveness and safety - of fortifying wheat flour with 200, 400 and 500 mg of calcium per 100 g of flour. DESIGN: Secondary analysis of cross-sectional data collected through repeated 24 h dietary recalls using the Iowa State University Intake Modelling, Assessment and Planning Program. SETTING: Urban cities in the National Health and Nutrition Survey of Argentina (ENNyS 2018-2019). PARTICIPANTS: 21 358 participants, including children, adolescents and adults. RESULTS: Most individuals in all age groups reported consuming wheat flour. The prevalence of low calcium intake was above 80 % in individuals older than 9 years. Simulating the fortification of 500 mg of calcium per 100 g of wheat flour showed that the prevalence of low calcium intake could be reduced by more than 40 percentage points in girls and women aged 19 to less than 51 years and boys and men aged 4 to less than 71 years, while it remained above 65 % in older ages. The percentages above the upper intake level remained below 1·5 % in all age groups. CONCLUSIONS: Calcium flour fortification could be further explored to improve calcium intake. Subnational simulations could be performed to identify groups that might not be reached by this strategy that could be explored in Argentina. This analysis could be used to advocate for a strategy to fortify wheat flour.


Assuntos
Cálcio da Dieta , Farinha , Alimentos Fortificados , Inquéritos Nutricionais , Triticum , Humanos , Farinha/análise , Feminino , Cálcio da Dieta/administração & dosagem , Masculino , Adulto , Adolescente , Criança , Adulto Jovem , Estudos Transversais , Pré-Escolar , Pessoa de Meia-Idade , Idoso , Argentina , Dieta/estatística & dados numéricos , Dieta/métodos
18.
Annu Rev Phytopathol ; 62(1): 193-215, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-38857542

RESUMO

Wheat is the predominant crop worldwide, contributing approximately 20% of protein and calories to the human diet. However, the yield potential of wheat faces limitations due to pests, diseases, and abiotic stresses. Although conventional breeding has improved desirable traits, the use of modern transgenesis technologies has been limited in wheat in comparison to other crops such as maize and soybean. Recent advances in wheat gene cloning and transformation technology now enable the development of a super wheat consistent with the One Health goals of sustainability, food security, and environmental stewardship. This variety combines traits to enhance pest and disease resistance, elevate grain nutritional value, and improve resilience to climate change. In this review, we explore ways to leverage current technologies to combine and transform useful traits into wheat. We also address the requirements of breeders and legal considerations such as patents and regulatory issues.


Assuntos
Plantas Geneticamente Modificadas , Triticum , Triticum/genética , Produtos Agrícolas/genética , Melhoramento Vegetal , Engenharia Genética , Doenças das Plantas/parasitologia , Doenças das Plantas/prevenção & controle , Resistência à Doença/genética
19.
Braz J Biol ; 84: e281973, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38836802

RESUMO

Agricultural management using technologies that help farmers increase productivity and reduce production costs must be promoted to ensure agricultural sustainability. The objective of the study was to achieve the pH effect of growth solution, chemical treatment, use of osmoprotector additive and mineral nitrate presence, on the activity of growth promoting bacteria, Azospirillum brasilense, and its effects on the physiological quality of seeds and wheat seedling growth. The first experiment evaluated the physiological quality of seeds and the second experiment was divided into four, evaluating the growth of wheat seedling in a hydroponic system. The experiments were prolonged in a very randomized design, with four replications. The physiological quality of the seeds was evaluated by germination tests, first germination count, length of the shoot and root and dry mass of the shoot and root. Initial growth was evaluated by quantifying the dry mass of the leaf shoot and root and the root system intervals. The pH of the solution and the presence of nitrogen did not influence the effects of inoculation of the A. brasilense bacteria. With the use of chemical treatment and osmoprotective additive, A. brasilense had no effect on the growth of wheat seedlings.


Assuntos
Azospirillum brasilense , Meios de Cultura , Germinação , Plântula , Triticum , Triticum/microbiologia , Triticum/crescimento & desenvolvimento , Azospirillum brasilense/fisiologia , Plântula/crescimento & desenvolvimento , Plântula/microbiologia , Germinação/fisiologia , Concentração de Íons de Hidrogênio
20.
Food Res Int ; 189: 114482, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38876611

RESUMO

The potential biopreservative role of a Type III sourdough (tIII-SD), produced by starter cultures of Fructilactobacillus sanfranciscensis and Lactiplantibacillus plantarum ATCC 8014, was assessed for its antifungal activity in baking applications. Fermentation was carried out using different substrates to enhance the production of antifungal metabolites for 24 and 48 h. The tIII-SD samples were analyzed in relation to pH, total titratable acidity (TTA) and the production of organic acids. The water/salt-soluble extract of the tIII-SD was evaluated in relation to the inhibition potential against key fungi that contaminate bakery products including Penicillium roqueforti, Penicillium chrysogenum and Aspergillus niger. Finally, breads with 10 % of the tIII-SD were prepared and the fungi contamination was evaluated throughout the shelf life period. The lowest pH value in sourdough was obtained from 48-hour fermentation by L. plantarum. The saline extracts exhibited varying degrees of inhibition in the in vitro test; however, the greatest enhancement of this effect was obtained when whole wheat grain flour was used. The tIII-SD crafted from a blend of wheat and flaxseed flours and fermented with F. sanfranciscensis for 48 h (BSWF48h-FS), demonstrated superior performance compared to other formulations. This variant exhibited a total shelf life of 10 days, suggesting that the utilization of tIII-SD could serve as a viable alternative for natural antifungal agents, proving beneficial for the bakery industry.


Assuntos
Antifúngicos , Pão , Fermentação , Microbiologia de Alimentos , Pão/microbiologia , Pão/análise , Antifúngicos/farmacologia , Aspergillus niger/efeitos dos fármacos , Penicillium/efeitos dos fármacos , Concentração de Íons de Hidrogênio , Farinha/análise , Conservação de Alimentos/métodos , Triticum/química , Triticum/microbiologia , Penicillium chrysogenum , Lactobacillus plantarum/metabolismo
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