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首页> 外文会议>International citrus congress >Girdling Induces Photoinhibition and Triggers Photoprotecting Mechanisms in Young Leaves from Vegetative Shoots
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Girdling Induces Photoinhibition and Triggers Photoprotecting Mechanisms in Young Leaves from Vegetative Shoots

机译：Girdling诱导营养芽中幼叶中的光保护机制诱导和触发光保护机制

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摘要

The effects of girdling on quantum yield efficiency of photosystem II (ΦPSII), total leaf carbohydrate content, oxidative damage and antioxidative response was monitored in young leaves from vegetative shoots of two-year old 'Loretina' mandarin. Thirty days after treatment, total leaf carbohydrate content increased by 100% in girdled trees. Concomitantly, aΦPSII reduction of light-adapted leaves and an increase of malonyldialdehyde (MDA) were quantified in girdled trees, suggesting a transient disruption of photosynthetic apparatus associated with oxidative damage. In response, an increase in total carotenoids, xanthophylls and xanthophyll cycle pool size was observed. Although girdling brought about changes in the de-epoxidation state of the xanthophyll cycle, no change was observed in energy-dependent non-photochemical quenching (NPQ). Thus,the role of carotenoids during oxidative stress is discussed. In conclusion, this study provides evidence that, although girdling increases final fruit set in Citrus, it can also induce photoinhibition, oxidative damage and changes in carotenoid content and composition in young leaves from vegetative shoots.
机译：两年前“洛雷蒂娜”普通话营养芽的幼叶监测了光束II（φPSII），总叶碳水化合物含量，氧化损伤，氧化损伤，氧化损伤和抗氧化反应的影响。治疗后三十天，总叶碳水化合物含量增加100％，颈部颈部增加100％。同时，用围绕的树木量化光适应叶片的φPSII减少和MADONDIaldehyde（MDA）的增加，表明与氧化损伤相关的光合仪器的瞬态破坏。响应，观察到总类胡萝卜素，Xhishophyll和Xanthophyll循环池尺寸的增加。虽然环状的脱氧循环循环脱氧肿状态的变化，但在能量依赖性的非光化学淬火（NPQ）中没有观察到变化。因此，讨论了类胡萝卜素在氧化应激期间的作用。总之，本研究提供了证据表明，虽然环状增加了柑橘中的最终水果，但它也可以诱导来自植物疫苗的年轻叶子的皮肤抑制，氧化损伤和类胡萝卜素含量的变化。

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