GENETIC VARIABILITY AND RELEVANCE OF EPICUTICULAR WAXES IN RICE: PHYSIOLOGICAL CHARACTERIZATION AND DIFFERENTIAL EXPRESSION OF A FEW WAX BIOSYNTHETIC GENES LEADING TO ALLELE MINING
| dc.contributor.advisor | MOHAN RAJU, B | |
| dc.contributor.author | PRATHIBHA, M D | |
| dc.date.accessioned | 2016-11-30T08:42:49Z | |
| dc.date.available | 2016-11-30T08:42:49Z | |
| dc.date.issued | 02-08-12 | |
| dc.description.abstract | Maintaince of positive turgor and positive carbon gain are most critical for achieving increased water productivity. Plants have evolved to accumulate waxes on the leaf surfaces as a strategy to conserve moisture by reducing non stomatal transpiration. Further through reflection of heat radiations waxes decreases leaf temperature there by evolving an optimistic strategy for water conservation. To examine these hypotheses a set of 86 diverse germplasm of rice were evaluated for epicuticular wax content which ranged between 1μg to 25μg/cm2 leaf area representing a significant variability. This variability was consistent across developmental stages and seasons indicating a strong genetic control of this trait. EWC was found to have negative relationship between both rate of water loss and leaf temperature reiterating the relevance of waxes. The increased wax content among the stressed plants indicate the adoptive relevance of waxes. Based on the previous experiments, four genotypes each for low and high wax categories were selected and raised under well watered and water limited conditions. The well standardized gravimetric approach was adopted to maintain the specific stress regime (100% and 60% FC)The expression profile of few genes associated with wax biosynthesis was assessed in two contrasting genotypes differing in EWC found to be higher in high wax genotypes and stressed plants. Analysis of the composition of waxes revealed important variations between high and low wax types. | en_US |
| dc.identifier.other | TH-10266 | |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/88277 | |
| dc.language.iso | en | en_US |
| dc.publisher | University of Agricultural Sciences GKVK, Bangalore | en_US |
| dc.sub | Crop Physiology | en_US |
| dc.these.type | M.Sc | |
| dc.title | GENETIC VARIABILITY AND RELEVANCE OF EPICUTICULAR WAXES IN RICE: PHYSIOLOGICAL CHARACTERIZATION AND DIFFERENTIAL EXPRESSION OF A FEW WAX BIOSYNTHETIC GENES LEADING TO ALLELE MINING | en_US |
| dc.type | Thesis | en_US |