在接近零度的温度下,阻断了天热的马尔瓦西尔维斯特里斯 (Malva sylvestris) 的运动
Elena Arvaniti1, Efi Levizou2, Aris Kyparissis2
1Department of Biological Applications and Technology, University of Ioannina, 451 10 Ioannina, Greece.
Plants (Basel, Switzerland)
|July 14, 2023
概括
马尔瓦西尔维斯特里斯表现出直径热叶的叶子运动,跟踪太阳. 这种运动在结温度下停止,以保护植物,当温暖返回并恢复光合作用时恢复.
科学领域:
- 植物生理学 植物生理学
- 环境压力反应环境压力反应
- 光合作用 光合作用
背景情况:
- 叶子的半热运动,一种跟踪太阳的行为,对植物的功能至关重要.
- 了解植物对低温的反应对于预测生态系统动态至关重要.
研究的目的:
- 在低温压力下研究马尔瓦西尔维斯特里斯 (Malva sylvestris) 叶子的直径转移.
- 评估寒冷和结事件对植物生理功能的影响.
主要方法:
- 季节性测量叶子移动,叶绿素含量,水潜力和PSII光化学.
- 在体内叶绿素的光被用来评估光合作用性能.
- 对植物在其自然环境中进行了观察.
主要成果:
- 低温和结事件抑制了植物生长,降低了光合作用性能.
- 在寒冷时期,叶子的透气移动被阻止.
- 温度升高导致了新的叶子生长,改善了光合作用,并恢复了叶子的运动.
结论:
- 马尔瓦西尔维斯特里斯 (Malva sylvestris) 的透气性取决于温度,在接近零度的温度下停止.
- 这种停止保护光合作用装置免受寒冷应激期间的光抑制.
- 叶子运动和气候协同影响植物的水潜力.
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