Journal ArticleDOI
Indices of drought tolerance in wheat genotypes at early stages of plant growth
TLDR
Thirty diverse genotypes of bread wheat were evaluated for seed vigour index, germination percentage, root length, shoot length, root-to-shoot length ratio, coleoptile length and osmotic membrane stability under laboratory conditions, indicating suppression of variability under moisture stress conditions.Abstract:
Thirty diverse genotypes of bread wheat were evaluated for seed vigour index, germination percentage, root length, shoot length, root-to-shoot length ratio, coleoptile length and osmotic membrane stability under laboratory conditions. Considerable variation was observed for all the characters. Discrimination among the genotypes on the basis of mean values was better under normal than under moisture stress conditions, indicating suppression of variability under moisture stress conditions. Comparison of mean performance under normal and osmotic stress conditions indicated that the seed vigour index was the most sensitive trait, followed by shoot length, germination percentage and root length. The root-to-shoot length ratio, however, increased under osmotic stress. The magnitude of genetic components of variance and heritability were, in general, lower under osmotic stress than under normal conditions. All the characters except germination percentage, shoot length and coleoptile length showed considerable genetic variability. Heritability in the broad sense was also moderate to high for all the characters under both environments. Due to high heritability and genetic advance great benefit from selection can be expected for the osmotic membrane stability of leaf segments and root-to-shoot length ratio. Moderate progress can be expected from root length and seed vigour index. Correlation studies indicated that the osmotic membrane stability of the leaf segment was the most important trait, followed by root-to-shoot ratio and root length on the basis of their relationships with other traits.read more
Citations
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Journal ArticleDOI
Plant drought stress: effects, mechanisms and management
Muhammad Farooq,Muhammad Farooq,Abdul Wahid,Nobuya Kobayashi,Daisuke Fujita,Shahzad M. A. Basra +5 more
TL;DR: The effects of drought stress on the growth, phenology, water and nutrient relations, photosynthesis, assimilate partitioning, and respiration in plants, and the mechanism of drought resistance in plants on a morphological, physiological and molecular basis are reviewed.
Journal Article
Role of Mineral Nutrition in Alleviation of Drought Stress in Plants
TL;DR: An overview of some macronutrients (nitrogen, phosphorus, potassium, calcium and magnesium), micronut nutrients (Zinc, Boron, Copper and silicon) and silicon has been discussed in detail as how these nutrients play their role in decreasing the adverse effects of drought in crop plant.
Journal ArticleDOI
Drought tolerance in wheat.
TL;DR: This review paper has concentrated on the study of water limitation and its effects on morphological, physiological, biochemical, and molecular responses of wheat with the possible losses caused by drought stress.
Journal ArticleDOI
Epigenetic variation creates potential for evolution of plant phenotypic plasticity
TL;DR: This study provides evidence that variation in DNA methylation can cause substantial heritable variation of ecologically important plant traits, including root allocation, drought tolerance and nutrient plasticity, and that rapid evolution based on epigenetic variation alone should thus be possible.
Journal ArticleDOI
Temporal transcriptome profiling reveals expression partitioning of homeologous genes contributing to heat and drought acclimation in wheat (Triticum aestivum L.)
TL;DR: A large proportion of wheat homeologs exhibited expression partitioning under normal and abiotic stresses, which possibly contributes to the wide adaptability and distribution of hexaploid wheat in response to various environmental constraints.
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