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Melatonin Supports Photochemical Activity of Assimilation Apparatus and Delays Senescence of Leaves of Monocotyledonous Plants
Doklady Biochemistry and Biophysics ( IF 0.8 ) Pub Date : 2020-12-25 , DOI: 10.1134/s1607672920050051
E D Danilova 1 , M V Efimova 1 , L V Kolomeichuk 1 , V V Kuznetsov 1, 2
Affiliation  

Abstract

Melatonin supports the photochemical activity of photosystem II (PS II) and slows down the degradation of the main photosynthetic pigments during aging of leaves of monocotyledonous plants. The protective effect of melatonin is manifested in an increase in the maximum (Fv/Fm) and effective (Y(II)) quantum yield of PS II, in an increase of regulated (Y(NPQ)) and a decrease in unregulated dissipation of excitation energy (Y(NO)). These effects are based on the ability of melatonin to reduce the intensity of oxidative stress by maintaining a high level of carotenoids, which exhibit pronounced antioxidant properties, during aging.



中文翻译:

褪黑素支持同化装置的光化学活性并延迟单子叶植物叶片的衰老。

摘要

褪黑素支持光系统II(PS II)的光化学活性,并减缓单子叶植物叶片衰老过程中主要光合色素的降解。褪黑激素的保护作用表现为PS II的最大(F v / F m)和有效(Y(II))量子产率的增加,受调节的(Y(NPQ))的增加和不受调节的减少激发能量的耗散(Y(NO))。这些效果是基于褪黑激素通过保持高水平的类胡萝卜素(在衰老过程中表现出明显的抗氧化特性)来降低氧化应激强度的能力。

更新日期:2020-12-25
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