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[High temperature stres on crop pollen: a review].
Ming-Hui Lu1, Zhen-Hui Gong, Ru-Gang Chen
1College of Horticulture, Northwest A & F University, Yangling 712100, Shaanxi, China. lmhdick@163.com
Ying Yong Sheng Tai Xue Bao = the Journal of Applied Ecology
|October 3, 2009
Summary
High temperatures harm crop production by affecting pollen development. This review details cellular, physiological, and molecular impacts to guide strategies for maintaining crop yield under heat stress.
Area of Science:
- Plant Science
- Environmental Stress Biology
- Reproductive Biology
Context:
- Rising global temperatures pose a significant threat to agricultural productivity.
- Plant pollen is identified as a highly sensitive reproductive organ to thermal stress.
- Understanding heat stress impacts is crucial for food security.
Purpose:
- To review cytological, physiological, and molecular biological effects of high temperature on crop pollen.
- To synthesize current knowledge on heat stress impacts on pollen development and function.
- To provide a basis for developing strategies to mitigate heat stress in crops.
Summary:
- Cytological effects include altered endoplasmic reticulum and dictyosome function in pollen and associated cells.
- Physiological impacts encompass disrupted calcium (Ca2+) homeostasis, altered growth regulator levels, and impaired carbohydrate metabolism.
- Molecular responses involve insufficient heat shock protein induction and suppressed expression of essential pollen development genes.
Impact:
- Informs breeding programs for heat-tolerant crop varieties.
- Guides agricultural management practices to minimize yield losses due to heat waves.
- Contributes to a deeper understanding of plant reproductive stress responses.
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