在各种红三叶草生殖质加入中对水应激极端的反应
Angus D Heslop1,2, Zulfi Jahufer3, Rainer W Hofmann1
1Faculty of Agriculture and Life Sciences, Lincoln University, Lincoln, New Zealand.
Frontiers in plant science
|July 10, 2023
概括
红三叶草在缺水和积水的情况下增长减缓. 评估生殖质的特征,如根形态,对于培育适应气候的料作物至关重要.
科学领域:
- 农业学是一种农业学.
- 植物生理学 植物生理学
- 适应气候变化 适应气候变化
背景情况:
- 红三叶草 (Trifolium pratense L.) 是一种重要的多年料作物.
- 气候变化需要开发适应极端天气的植物品种,包括干旱和淹水.
- 了解功能特征是改善红三叶草在混合牧场中的表现的关键.
研究的目的:
- 评估红三叶草对缺水和积水的形态和生理反应.
- 确定有助于植物在压力下应对机制的关键特征.
- 为了比较红三叶草与白三叶草的耐压力.
主要方法:
- 一个随机的完整的街区温室试验.
- 测试七个红三叶草种群和白三叶草.
- 在控制条件下 (15%VMC),缺水 (5%VMC) 和浸水 (50%VMC) 条件下评估工厂性能.
- 测量十二个形态和生理特征.
主要成果:
- 缺水减少了地面特征,包括总干物质减少了41%,叶子数量和厚度减少了50%.
- 在缺水的情况下,根与芽的比率增加表明了转向根维护的转变.
- 浸水减少了光合作用活动,导致红三叶草的根干量减少 (30%) 和叶数减少 (34%).
- 与白三叶草相比,红三叶草在浸水下表现出根干质量减少83%.
结论:
- 红三叶草的表现受到水资源短缺和积水严重影响.
- 根形态对于浸水耐受性至关重要,白色三叶草的表现优于红色三叶草.
- 跨越极端水应激的生殖质评价对于识别旨在气候适应性的未来育种计划的特征至关重要.
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