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葡萄树叶对不同衰老时期高温的生理反应

Shiwei Guo^1,2, Riziwangguli Abudureheman^1,2, Zekai Zhang^2,3

¹College of Horticulture, Xinjiang Agricultural University, Urumqi 830052, China.

Plants (Basel, Switzerland)

|October 29, 2025

概括

高温加快葡萄树叶衰老,损害光合作用和抗氧化活性. 年轻的叶子表现出更多的弹性,但热应激会造成持续的损伤,影响葡萄藤产量.

科学领域:

植物生理学植物生理学
环境压力生物学
农业科学农业科学

背景情况:

叶子衰老对于葡萄藤的发展和产量至关重要,但对高温等环境因素敏感.
高温加快了叶子的衰老,对葡萄树的光合作用和果实发育产生了负面影响.

研究的目的:

在自然高温条件下研究葡萄树叶中的叶绿素光和生理特征.
确定热应激对 *Vitis vinifera* L. 的不同衰老阶段的影响.

主要方法:

在年轻和老葡萄叶中测量了叶绿素含量,MDA水平,抗氧化酶活性 (POD,SOD,CAT) 和叶绿素光参数.
在Turpan的自然高温条件下评估了生理和光合作用反应.
在温度降低后评估功能部分恢复.

主要成果:

年轻的叶子保持了较高的叶绿素含量,但容易枯;较老的叶子显示加快的化.
高温损害了光系统II (PSII) 功能,降低了光化学效率 (例如,Fv/Fm下降).
抗氧化剂水平 (POD,SOD,CAT) 和MDA最初上升,然后下降,与叶子年龄和光合作用衰退相关;年轻的叶子表现出更大的弹性.

结论:

高温加快葡萄树叶衰老,导致持续的功能衰退,即使经过恢复期.
年轻的叶子表现出比较老的叶子更大的生理弹性热应激.
结果为管理热引起的衰老和改进葡萄藤种植策略提供了洞察力.

关键词:

葡萄树的葡萄藤是葡萄树的葡萄.高温的高温的高温的高温.叶子衰老叶子衰老生理特征生理特征

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