Mechanisms and Adaptation Strategies to Improve Heat Tolerance in Rice. A Review.
Shahbaz Khan1, Sumera Anwar2,3, M Yasin Ashraf2
1College of Agriculture, Shanxi Agricultural University, Taigu 030801, China.
Plants (Basel, Switzerland)
|November 17, 2019
Summary
Climate change threatens rice production with heat waves. Breeding for heat-tolerant rice varieties and adjusting farming practices are key strategies to ensure sustainable rice yields.
Area of Science:
- Agricultural Science
- Plant Science
- Climate Change Adaptation
Background:
- High-temperature episodes pose a significant threat to sustainable rice production, particularly in key growing regions.
- Climate change exacerbates this issue, necessitating adaptive strategies to mitigate yield losses.
Purpose of the Study:
- To explore strategies for enhancing rice thermotolerance in the face of climate change.
- To identify key traits and methods for breeding heat-resistant rice cultivars.
Main Methods:
- Reviewing adaptive strategies including agronomic practice modification, use of growth regulators, and breeding for genetic resistance.
- Investigating genotypic differences to identify traits conferring thermotolerance.
- Examining the role of early morning flowering, anther characteristics, pollen viability, and heat shock proteins.
Main Results:
- Agronomic adjustments like altered sowing times and selecting early-flowering cultivars can improve heat tolerance.
- Growth regulators and fertilizers can induce acclimation.
- Specific traits such as larger anthers, high pollen viability, and high expression of heat shock proteins are associated with enhanced thermotolerance.
Conclusions:
- Breeding programs can leverage identified traits to develop climate-resilient rice cultivars.
- A combination of breeding and adaptive agronomic practices is crucial for sustainable rice production under changing climate conditions.
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