低树冠,根温和干旱在芽阶段对米产量,谷物质量,光合作用和抗氧化剂反应的影响
Xuexue Liu1, Jinxi Zheng1, Xiaolong Feng2
1State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Agriculture, South China Agricultural University, Guangzhou, China.
Physiologia plantarum
|May 21, 2025
概括
低根温度和联合压力严重降低了大米的产量和质量. 根部低温压力对米的影响比树冠低温更大,干旱加剧了影响,但Yuejingsimiao 2显示出更好的弹性.
科学领域:
- 农业科学 农业科学
- 植物生理学 植物生理学
- 压力生物学 压力生物学
背景情况:
- 米产容易受到环境压力因素的影响,如低温和干旱.
- 了解对综合压力的基因型反应对于作物弹性至关重要.
研究的目的:
- 调查低树冠温度,根低温和/或干旱压力对大米产量,质量,生物质,光合作用和抗氧化剂反应的影响.
- 为了比较大米基因型Huahang 31和Yuejingsimiao 2的抗压能力.
主要方法:
- 应用了八种治疗方法,包括控制,个体应力 (天花板低温,根部低温,根干旱) 和组合应力.
- 测量包括产量,质量,生物质积累,光合作用参数和抗氧化剂反应 (proline含量,催化酶活性).
主要成果:
- 根部低温和联合压力显著降低了大米的产量和质量.
- 树冠低温,根低温和根干旱 (CL&RL&RD) 的组合大大降低了两种基因型的产量.
- 压力会对光合作用产生负面影响,改变生物质分配和抗氧化剂反应受损,根的低温比树冠的低温更有害.
结论:
- 根的低温和联合压力对的生理学产生重大影响,影响抗氧化反应,光合作用,最终影响产量,质量和生物量.
- 干旱压力加剧了低温压力的负面影响.
- 与华31号相比,Yuejingsimiao 2号表现出更大的抗压能力.
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