期刊
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
卷 188, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.envexpbot.2021.104517
关键词
Combined; Drought; Heat; Seed germination; Tolerance; Genetic engineering
资金
- 'His Majesty Trust Fund', Sultan Qaboos University [SR/AGR/CROP/19/01]
High temperature and drought stress during grain formation in wheat affect grain development, requiring wheat genotypes that can better tolerate H + D stress for sustainable food production. H + D stress disrupts wheat grain developmental characteristics, reducing grain yield, but there is genetic variability in tolerance to stress; H + D tolerance can be induced through genetic engineering, agronomic practices, and marker-assisted selection.
High temperature and drought stress during grain formation in wheat affect grain development. Along with the increasing human population pressure are predicted increases in temperature and decline in water resources. Wheat genotypes that can better tolerate combined heat and drought stress (H + D) are needed to ensure sustainable food production. Wheat can tolerate water-deficit conditions, but few studies have investigated the associated wheat grain developmental characteristics and stress tolerance mechanisms. H + D stress disrupts meiosis, arrests cell division and expansion, damages pollen grains and the pollen sac, causes pollen sterility and shrivels anthers, reduces stigma receptivity, aborts ovules, and disrupts cell division in the central and peripheral endodermis, thus reducing the breadth and length of the endodermis. The subsequent reduction in grain sink potential eventually leads to reduced mature grain mass and shriveled grain to a considerable extent. However, genotypic variability exists for drought and heat-induced disruption and tolerance in wheat. Combined H + D tolerance can be induced through genetic engineering, agronomic practices, and marker-assisted selection. This review describes the current state of knowledge on the effect of combined H + D stress and possible management strategies to avert damage to wheat grain during grain development and maturation.
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