模拟葡萄树叶的反射和生理反应,以增加高剂量和变化的光和水的可用性
Marianne Heidi Bartczak1, Michele Croci1, Harsh Tiwari1
1Department of Sustainable Crops Production, Università Cattolica del Sacro Cuore, Piacenza, Italy.
Plant physiology and biochemistry : PPB
|November 13, 2025
概括
考林叶喷雾可以在水应激下为葡萄树提供光保护. 虽然3%的考林有助于恢复,但高于7%的剂量会在非压力条件下降低光合作用,可能会延迟葡萄的成熟.
科学领域:
- 农业科学 农业科学
- 植物生理学 植物生理学
- 保护作物的作物保护.
背景情况:
- 考林粘土用于减轻水和热量对作物造成的压力.
- 对于作物生理学的最佳考林应用率还没有得到很好的定义.
- 过多的高可能会降低碳同化,但门值是未知的.
研究的目的:
- 评估不同度的考林 (3%,5%,7% w/v) 对葡萄树叶生理学的影响.
- 评估高在不同的光线和水的可用性条件下的影响,包括水应激和再水.
- 为了确定最佳的高剂量用于光保护,而不会影响光合作用效率.
主要方法:
- 盆栽葡萄树接受了3%,5%和7%的叶子烯应用,与未经处理的对照一起.
- 葡萄酒受到逐渐的水应力,午间的茎水潜力为-1.3 MPa,然后再灌.
- 在不同的光强度下测量了叶子的生理参数,包括净光合作用率,透气和叶子反射率.
主要成果:
- 3%高在充分供水的情况下对光合作用没有负面影响.
- 7%高在适度光线水平 (50-900 μmol m−2 s−1) 下显著降低了净光合作用.
- 在重新灌后,7%的考林处理在光和下增强了光合作用速率,与对照组相比.
- 考林增加了叶子反射率,特别是在红外波长中,并且在5%和7%的剂量下提高了光化学反射率指数.
- 中间叶子对考林的反应比基底或顶点叶子更强.
结论:
- 3%的考林应用在水应激下提供光保护,对光合作用产生最小的影响.
- 较高的高剂量 (7%) 在最佳条件下可以通过降低光使用效率来降低光合作用能力.
- 高度的考林可能有利于限制光合作用,以减少糖累积和延迟葡萄的成熟.
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