Rice blast, an erratic niche disease incited by Magnaporthe grisea Cav., frequently limits rough rice yields and grower cultivar options in Arkansas rice production areas. Scientists poorly understand why some blast-susceptible varieties such as ‘Newbonnet’, ‘LaGrue’, ‘Mars’, and ‘Cypress’ become increasingly more blast resistant if grown in continuously flooded soil. A greenhouse depth-of-floo...

Root system architecture (RSA) impacts plant fitness and crop yield by facilitating efficient nutrient and water uptake from the soil. A better understanding of the effects of soil on RSA could improve crop productivity by matching roots to their soil environment. We used x-ray computed tomography to perform a detailed three-dimensional quantification of changes in rice (Oryza sativa) RSA in re...

Magnaporthe grisea is an ascomycete that is the causal agent of rice blast disease. The disease is one of the most destructive diseases of rice for the significant loss of the crop. The major strategies for defense against the disease are drugs and resistant cultivars, However, the fungus has been known to be highly variable with respects to drug resistance and host cultivar specificity, and th...

The effects of exogenous ascorbic acid (AsA) and reduced glutathione (GSH) on antioxidant enzyme activities [superoxide dismutase (SOD), ascorbate peroxidase (APX), and glutathione reductase (GR)] and the contents of malondialdehyde (MDA) and H2O2, as well as of endogenous AsA and GSH, in the chloroplasts of two rice cultivars, the salt-tolerant cultivar Pokkali and the salt-sensitive cultivar ...

Anthocyanin is a major class of flavonoids that tissues produce in response to environmental signals. The pigmentation of colored rice was analyzed by oligo microarray based on two factors, cultivar and developmental stage. As many as 250 and 350 genes were identified to be significantly upand down-regulated. Using hypergeometric analysis for transcription factor function, the Myb and GT famili...

The brown planthopper (BPH) is one of the most serious insect pests of rice throughout Asia. In this study, we constructed a linkage map to determine the locus for BPH resistance gene, using an F(2) population from a cross between a resistant indica cultivar, 'Col.5 Thailand', and a susceptible cultivar '02428'. Insect resistance was evaluated using 147 F(3) families and the genotype of each F(...

in this study, three varieties of rice including tarom, anbarbo and hashemi were selected and their heavy metals content were analyzed. subcritical water was used to provide rice bran extract at temperatures 100 and 120 ° c. in order to provide grape juice treatments, we used 5, 10, 15 and 20 % of extract in the formulation of red grape drink. samples which had packed and pasteurized, kept in t...

rice plants are injured at the seedling stage in early spring in northern iran. in order to study rice response to cold stress, the expression of osdreb1a, osap37, osmyb3r-2, and osnac6 genes encoding transcription factors was observed in 14-day-old seedlings of cold-tolerant genotype pr and cold-sensitive cv. hashemi during cold stress (5°c for 24 h) using the differential display method and t...

We identified a gene responsible for tolerance to boron (B) toxicity in rice (Oryza sativa), named BORON EXCESS TOLERANT1. Using recombinant inbred lines derived from the B-toxicity-sensitive indica-ecotype cultivar IR36 and the tolerant japonica-ecotype cultivar Nekken 1, the region responsible for tolerance to B toxicity was narrowed to 49 kb on chromosome 4. Eight genes are annotated in this...