The effect of methyl jasmonate on Zea mays tassel development / O efeito de methyl jasmonato sobre o devolvimento do pendão de Zea mays

Methyl jasmonate (MeJA) is a lipid-derived plant hormone that mediates diverse biological phenomena. Application of MeJA onto rice spikelet could exhibit abnormal floral organ development. Although jasmonic acid (JA) has been proved to be involved in maize tassel sex determination process, the roles of JA and its precursor MeJA in maize tassel development still remain obscure. In this study, we found that tassel development was decelerated by application of 2 mM MeJA. Exogenous MeJA also influenced the number of palea and stamens of tassel spikelets. Exogenous MeJA increased the expression level of some key regulator genes, which may responsible for the phenotypic change in MeJA-treated tassel, and may mediate the crosstalk between MeJA and other hormones.

jasmonate (MeJA) é um derivado lipídico vegetal hormônio que medeia Diversos fenómenos biológicos.Aplicação de MeJA para arroz spikelet poderá apresentar Desenvolvimento anormal DOS órgãos florais.Apesar de Ácido jasmónico (Ja), precursor de MeJA, mostrou ser envolvido no processo de determinação do sexo de milho tassel, OS papéis DOS dois compostos de milho tassel Desenvolvimento ainda permanecem obscuros.No presente estudo, descobrimos que o Desenvolvimento FOI desacelerada pelo pedido do tassel de 2 mm MeJA.MeJA exógeno também influenciou o número de palea e estames de tassel spikelets.MeJA aumentou o nível de expressão exógena, um regulador chave genes, o que Pode o responsável PELA alteração fenotípica EM MeJA tratados tassel, e podem mediar a interferência entre MeJA e outras hormonas.

A new approach for crop identification with wavelet variance and JM distance.

This paper develops a new crop mapping method through combined utilization of both time and frequency information based on wavelet variance and Jeffries-Matusita (JM) distance (CIWJ for short). A two-dimensional wavelet spectrum was obtained from datasets of daily continuous vegetation indices through a continuous wavelet transform using the Mexican hat and the Morlet mother wavelets. The time-average wavelet variance (TAWV) and the scale-average wavelet variance (SAWV) were then calculated based on the wavelet spectrum of the Mexican hat and the Morlet wavelet, respectively. The class separability based on the JM distance was evaluated to discriminate the proper period or scale range applied. Finally, a procedure for criteria quantification was developed using the TAWV and SAWV as the major metrics, and the similarity between unclassified pixels and established land use/cover types was calculated. The proposed CIWJ method was applied to the middle Hexi Corridor in northwest China using 250-m 8-day composite moderate-resolution imaging spectroradiometer (MODIS) enhanced vegetation index (EVI) time series datasets in 2012. The CIWJ method was shown to be efficient in crop field mapping, with an overall accuracy of 83.6 % and kappa coefficient of 0.7009, assessed with 30 m Chinese Environmental Disaster Reduction Satellite (HJ-1)-derived data. Compared with methods utilizing information on either frequency or time, the CIWJ method demonstrates tremendous potential for efficient crop mapping and for further applications. This method could be applied to either coarse or high spatial resolution images for agricultural crop identification, as well as other more general or specific land use classifications.

O polimorfismo do gene AKL7 está associado ao risco de síndrome metabólica e à remodelação cardiovascular / ALK7 gene polymorphism is associated with metabolic syndrome risk and cardiovascular remodeling

FUNDAMENTO: Quinase Tipo Receptor de Ativina 7 (ALK7) é um tipo de receptor I para a superfamília TGF-β e recentemente apresentou ter uma função importante na manutenção de homeostase metabólica. OBJETIVO: Investigar a associação do polimorfismo do gene ALK7 à síndrome metabólica (SMet) e remodelação cardiovascular em pacientes com SMet. MÉTODOS: O polimorfismo de nucleotídeo único rs13010956 no gene ALK7 foi genotipado em 351 indivíduos chineses submetidos à ultrassonografia cardíaca e das carótidas. As associações do polimorfismo do gene ALK7 ao fenótipo e aos parâmetros da síndrome metabólica e características ultrassônicas cardiovasculares foram analisadas. RESULTADOS: O polimorfismo de rs13010956 no gene ALK7 foi considerado significativamente relacionado ao fenótipo de SMet em mulheres (p < 0,05) e significativamente associado à pressão sanguínea em populações totais (p < 0,05) e femininas (p < 0,01). Outras análises revelaram que rs13010956 estava associado à média da espessura íntima-média de artérias carótidas em mulheres (p < 0,05). Após o controle do índice de massa corporal, pressão arterial, glicemia em jejum e triglicérides, o rs13010956 também foi considerado significativamente associado ao índice de massa do ventrículo esquerdo em populações totais (p < 0,05) e femininas (p < 0,05). CONCLUSÃO: Nossos achados sugeriram que o polimorfismo de rs13010956 do gene ALK7 estava significativamente vinculado ao risco de SMet em mulheres e pode estar envolvido na remodelação cardiovascular em pacientes com SMet.

BACKGROUND: Activin receptor-like kinase 7 (ALK7) is a type I receptor for the TGF-β superfamily and has recently been demonstrated to play an important role in the maintenance of metabolic homeostasis. OBJECTIVE: To investigate the association of the ALK7 gene polymorphism with metabolic syndrome (MetS) and cardiovascular remodeling in MetS patients. METHODS: The single nucleotide polymorphism rs13010956 in the ALK7 gene was genotyped in 351 Chinese subjects undergoing carotid and cardiac ultrasonography. The associations of the ALK7 gene polymorphism with the MetS phenotype, MetS parameters, and cardiovascular ultrasonic features were analyzed. RESULTS: The rs13010956 polymorphism in the ALK7 gene was found to be significantly associated with the MetS phenotype in females (p < 0.05) and was also significantly associated with blood pressure in the total (p < 0.05) and female populations (p < 0.01). Further analysis revealed that rs13010956 was associated with mean intima-media thickness of the carotid arteries in females (p < 0.05). After control for body mass index, blood pressure, fasting blood glucose, and triglycerides, rs13010956 was also found to be significantly associated with left ventricular mass index in the total (p < 0.05) and female populations (p < 0.05). CONCLUSION: Our findings suggested that the ALK7 gene polymorphism rs13010956 was significantly associated with MetS risk in females and may be involved in cardiovascular remodeling in MetS patients.

ALK7 gene polymorphism is associated with metabolic syndrome risk and cardiovascular remodeling.

BACKGROUND: Activin receptor-like kinase 7 (ALK7) is a type I receptor for the TGF-ß superfamily and has recently been demonstrated to play an important role in the maintenance of metabolic homeostasis. OBJECTIVE: To investigate the association of the ALK7 gene polymorphism with metabolic syndrome (MetS) and cardiovascular remodeling in MetS patients. METHODS: The single nucleotide polymorphism rs13010956 in the ALK7 gene was genotyped in 351 Chinese subjects undergoing carotid and cardiac ultrasonography. The associations of the ALK7 gene polymorphism with the MetS phenotype, MetS parameters, and cardiovascular ultrasonic features were analyzed. RESULTS: The rs13010956 polymorphism in the ALK7 gene was found to be significantly associated with the MetS phenotype in females (p < 0.05) and was also significantly associated with blood pressure in the total (p < 0.05) and female populations (p < 0.01). Further analysis revealed that rs13010956 was associated with mean intima-media thickness of the carotid arteries in females (p < 0.05). After control for body mass index, blood pressure, fasting blood glucose, and triglycerides, rs13010956 was also found to be significantly associated with left ventricular mass index in the total (p < 0.05) and female populations (p < 0.05). CONCLUSION: Our findings suggested that the ALK7 gene polymorphism rs13010956 was significantly associated with MetS risk in females and may be involved in cardiovascular remodeling in MetS patients.

Correlation between surgical modality and clinicopathologic characteristics for ureteral transitional cell carcinoma.

PURPOSE: To investigate the relationship between surgical modality and clinicopathologic features for ureteral transitional cell carcinoma. METHODS: The correlation between surgical modality and clinicopathology characteristics of 146 patients with ureteral carcinoma having undergone surgery was evaluated using univariate analysis by a general linear model. RESULTS: 43.8%, 51.4% and 4.8% of patients experienced nephroureterectomy, renal conservation management and palliative operations, respectively, with a mean survival time of 97.3, 101.3 and 51.0 months (p=0.069) accordingly. Univariate analysis by general linear model indicated that the size of lesions, pathologic stage and tumour grade had a statistically significant impact on surgical modality (p=0.000, p=0.001 and p=0.017, respectively). CONCLUSION: Tumour stage and grade, as well as tumour size, correlate with surgical modality.