Journal of Agronomy and Crop Science· 2016Q1· Review
Drought Stress in Grain Legumes during Reproduction and Grain Filling
- 461citations
- Q1SCImago
- 2016year
Short summary
Terminal drought during reproduction and grain filling critically reduces grain legume yield by impairing photosynthesis, grain set, and development. Understanding these impacts and resistance mechanisms is crucial for breeding improved crop varieties.
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Key points
- Terminal drought significantly impacts grain legume yield, particularly during reproduction and grain filling.
- Key physiological impacts include reduced net photosynthesis, poor grain set, and impaired grain development.
- Understanding drought resistance mechanisms is essential for developing improved crop varieties.
- The review discusses impacts on leaf development, light harvesting, carbon fixation, and grain composition.
AI-generated from the title and abstract; the full text is not read.
Abstract
Abstract Water scarcity is a major constraint limiting grain legume production particularly in the arid and semi‐arid tropics. Different climate models have predicted changes in rainfall distribution and frequent drought spells for the future. Although drought impedes the productivity of grain legumes at all growth stages, its occurrence during reproductive and grain development stages (terminal drought) is more critical and usually results in significant loss in grain yield. However, the extent of yield loss depends on the duration and intensity of the stress. A reduction in the rate of net photosynthesis, and poor grain set and grain development are the principal reasons for terminal drought‐induced loss in grain yield. Insight into the impact and resistance mechanism of terminal drought is required for effective crop improvement programmes aiming to improve resistance to terminal drought in grain legumes. In this article, the impact of terminal drought on leaf development and senescence, light harvesting and carbon fixation, and grain development and grain composition is discussed. The mechanisms of resistance, management options, and innovative breeding and functional genomics strategies to improve resistance to terminal drought in grain legumes are also discussed.
The authors' abstract, as published at the source. Journal of Agronomy and Crop Science, 2016 · DOI ↗
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Field: Agronomy and Crop Science
Agronomy and Crop ScienceAgricultural and Biological Sciences