Application of potassium iodide as a new agent for screening of drought tolerance upland rice genotypes at flowering stage
Loading...
Date
2012
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Plant Knowledge Journal
Abstract
Selection of appropriate physiological criteria is still an impediment for the breeding of drought tolerant rice varieties. An experiment
was conducted to analyze the effect of potassium iodide (KI) for it’s suitability as a selection criterion to screen upland rice
genotypes. Three different KI concentrations vis. 0.25%, 0.50% and 0.75% were applied on eight rice genotypes comprising four
tolerant and four susceptible ones. Injuries in young tissues, reduction in yield, panicle length, panicle weight, grain number and
grain weight were observed at the KI concentrations of 0.50 and 0.75%. However, 0.25% KI concentration did not showed
significant injury effects on rice genotypes. The significant correlation of grain yield with apparent translocation rate (R2 = 0.54) was
also observed, indicating reduction in current assimilation during reproductive stage, under different KI treatments and tolerant rice
genotypes induced an increase in stem reserve mobilization. SDS-PAGE profiling of KI treated rice leaves induced novel protein
bands of 30 kDa, 50 kDa and 70 kDa in tolerant rice genotypes. The present study concluded that KI can be used as chemical
desiccant for the screening of drought tolerant upland rice varieties at reproductive stage.
Description
Article
Keywords
null