Author: Abdulkadir Ahmed ElmiPublisher:
ISBN:
Category : Wheat
Languages : en
Pages : 144
Book Description
Physiological Measurements of Drought Stress on Spring Wheat (Triticum Aestivum L.)
Author: Abdulkadir Ahmed ElmiPublisher:
ISBN:
Category : Wheat
Languages : en
Pages : 144
Book Description
Drought Stress Influence on Some Physiological Processes in Winter Wheat (Triticum Aestivum L.)
Author: Mohamed Salem ZaidiPhysiological Studies on Wheat (Triticum Aestivum L.) Under Water Stress
Author: Jagbir SinghAlterations of the Internal Water Relations in Wheat (Triticum Aestivum L.) Upon Exposure to Drought Stress
Author: Jeffrey James MelkonianPublisher:
ISBN:
Category : Plant-water relationships
Languages : en
Pages : 274
Book Description
Drought Stress Tolerance in Plants, Vol 1
Author: Mohammad Anwar HossainPublisher: Springer
ISBN: 3319288997
Category : Technology & Engineering
Languages : en
Pages : 538
Book Description
Abiotic stress adversely affects crop production worldwide, decreasing average yields for most of the crops to 50%. Among various abiotic stresses affecting agricultural production, drought stress is considered to be the main source of yield reduction around the globe. Due to an increasing world population, drought stress will lead to a serious food shortage by 2050. The situation may become worse due to predicated global climate change that may multiply the frequency and duration and severity of such abiotic stresses. Hence, there is an urgent need to improve our understanding on complex mechanisms of drought stress tolerance and to develop modern varieties that are more resilient to drought stress. Identification of the potential novel genes responsible for drought tolerance in crop plants will contribute to understanding the molecular mechanism of crop responses to drought stress. The discovery of novel genes, the analysis of their expression patterns in response to drought stress, and the determination of their potential functions in drought stress adaptation will provide the basis of effective engineering strategies to enhance crop drought stress tolerance. Although the in-depth water stress tolerance mechanisms is still unclear, it can be to some extent explained on the basis of ion homeostasis mediated by stress adaptation effectors, toxic radical scavenging, osmolyte biosynthesis, water transport, and long distance signaling response coordination. Importantly, complete elucidation of the physiological, biochemical, and molecular mechanisms for drought stress, perception, transduction, and tolerance is still a challenge to the plant biologists. The findings presented in volume 1 call attention to the physiological and biochemical modalities of drought stress that influence crop productivity, whereas volume 2 summarizes our current understanding on the molecular and genetic mechanisms of drought stress resistance in plants.
Morpho-physiological Studies For Drought Adaptation In Wheat
Author: Dipendra PokharelPublisher: LAP Lambert Academic Publishing
ISBN: 9783846533574
Category :
Languages : en
Pages : 84
Book Description
Wheat (Triticum aestivum L.) is the most important cereal crop for global food supply. Most of the wheat crop in developing countries including Nepal is either grown rainfed condition or under limited irrigation condition, thus water stress hits the wheat crop at different growth stages which thus limiting the grain yield. An experiment with 60 different genotypes of wheat was carried out in Nepal for the characterization for drought adaptation.The ANOVA (Analysis of Variance) revealed significant variation between environments and among the wheat germplasms for most of the drought adaptive traits. A wide range of variability was observed for the selected drougt adaptive morpho-physiological traits in moisture stressed and non-stressed environments. WUE was highly significantly correlated with biomass production. Nepalese cultivar Gautam showed a number of favorable drought adaptive traits. A number of landraces and advanced breeding lines showed high level of water use efficiency and other positive traits for drought adaptation.
Improving Drought Tolerance in Wheat with Physiological and Molecular Tools
Author: Surya Laxmi ShresthaPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Drought is a limiting factor for wheat (Triticum aestivum L.) production in the low precipitation regions of the Pacific Northwest (PNW). To improve wheat performance in drought, this study focused on three main objectives. Our first objective was to determine water use efficiency (WUE) in the PNW wheat lines through carbon isotope discrimination (CID) technique. Genotypic variation of CID was found in soft spring and hard winter wheat lines. Low CID or high WUE was found important for increasing yield of soft spring wheat lines in drought and semi-drought environments but not in other wheat types. The second objective of this study was to determine important physiological traits associated with yield. Fifteen spring wheat, 140 Alpowa/Express (AE) recombinant inbred lines (RILs) and 165 Hollis/Drysdale (HD) RILs, were evaluated in replicated field trials in two moisture environments, rainfed and irrigated, in different years. The wheat materials were screened for physiological (CT, CID, FLS: Flag leaf senescence), agronomic and phenological traits. The low canopy temperature (CT) was consistently associated with high yield in all wheat lines. The study found that CT was the main driver of wheat adaptation in drought in studied environmental conditions. Our third objective was to identify genomic regions associated with the studied traits through quantitative trait loci (QTL) mapping. In the AE population, yield and test weight QTL were identified on chromosome 1B in the irrigated environments but none of the QTL for physiological traits was found in this chromosomal region. The major QTL associated with yield and CT (at milking), which explained 15 and 22% of the phenotypic variation, were found on chromosome 3B in terminal drought environment. In the HD population, two QTL associated with yield were identified on chromosomes 2A and 4A in averaged rainfed environments in which yield QTL on chromosome 4A explained 35% of the phenotypic variation. These QTL for yield were associated with later FLS. Through the genetic dissection of yield into component traits, this study may help to incorporate quantitative traits into wheat drought breeding programs through marker-assisted selection.
Some Physiological Processes in Winter Wheat (Triticum Aestivum L.) and Cowpeas (Vigna Unguiculata L.) as Affected by Drought Stress
Author: Errol Garth RhodenCornell Soil Health Assessment Training Manual
Author: Beth K. GuginoPublisher:
ISBN: 9780967650746
Category : Soil biology
Languages : en
Pages : 52
Book Description
Multiple abiotic stresses: Molecular, physiological, and genetic responses and adaptations in cereals
Author: Sindhu SareenPublisher: Frontiers Media SA
ISBN: 2832518311
Category : Science
Languages : en
Pages : 170
Book Description