Physio-biochemical Responses of Wheat Genotypes under Drought Stress
Journal Title: International Journal of Plant & Soil Science - Year 2016, Vol 13, Issue 3
Abstract
Tolerance strategies under water deficit conditions involve many physiological and biochemical responses which help crops to cope with drought stress. To study wheat response to stress, twenty Iranian wheat genotypes were evaluated in two separate field experiments during 2009-2010 growing season. Each experiment was conducted as randomized complete block design with three replications. The moisture level in one experiment was 100% field capacity while 45% field capacity was applied at the second experiment. Several biochemical (catalase, peroxidase, superoxide dismutase, ascorbate peroxidase and lipid peroxidation) and physiological indices (relative water content, relative water protection, stomatal resistance, chlorophyll and canopy temperature depression) were measured. Drought stress increased activities of lipid peroxidation, relative water protection, relative water content, stomatal resistance, chlorophyll and canopy temperature depression significantly at the pre-anthesis stage (Z34). Higher antioxidant activities, relative water content, relative water protection, chlorophyll, stomatal resistance and canopy temperature depression, and lower lipid peroxidation were observed in tolerant genotypes. The results demonstrated positive correlation of antioxidants with relative water content, relative water protection, chlorophyll, stomatal resistance and canopy temperature depression, and negative correlation with lipid peroxidation. Relative water protection and superoxide dismutase were suitable indices for screening and classifying tolerant genotypes. The results suggested that a combination of traits such as higher antioxidant activity, stomatal resistance and water retention capacity lead to wheat drought tolerance and the cultivars Kavir and Bahar were the most and least tolerant genotypes, respectively.
Authors and Affiliations
Ali Aliakbari-Sadeghabad, Hojjat Hasheminasab
Keywords
Related Articles
- EP ID EP351460
- DOI 10.9734/IJPSS/2016/28354
- Views 124
- Downloads 0
Effect of Urine Sources on Some Soil Health Indicators, Maize Yield and Its Heavy Metals Uptake in Abakaliki, Southeastern Nigeria
The need to find alternative to inorganic fertilizer which is costly and not easily affordable to local farmers necessitates research in rare areas. Thus, this experiment was carried out at the Plant and Screen house to...
Response of Alectra vogelii Benth to Different Crop Root Exudates
Aims: The aim of the study was to evaluate the effect of root exudates from cowpea, groundnut, maize, sorghum and pearl millet genotypes on the germination and attachment of Alectra vogelii. It also aimed to identify fun...
Relationships between Plug Cell Size and Substrate Quality in the Bedding Pot Plant Impatiens wallerana (Hook. F.)
In pot plant production, balancing the air and water content in the medium is one of the largest problems. The ‘root restriction’ effects of the plug cells on seedling growth during nursery could increase after transplan...
A Phylogenetic Exercise for the Study of Plants-Herbivores Interactions: The Genus Piper as a Case Study
Phylogenetics, a useful tool for evolutionary ecology used to interpret species properties and recently, biological interactions based on historical rigorous hypotheses. Some of the most important ecological and evolutio...
Soil Compaction under Three Different Land Use Systems within the Semi-deciduous Agro-ecological Zone of Ghana
Soil compaction due to land management systems has profound implications on soil physical properties with consequent effects on soil productivity. The paper at hand a...