Carotenoid oxidation products as stress signals in plants
Carotenoid oxidation products as stress signals in plants
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DOI：
10.1111/tpj.12386
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发表时间：
2014-08-01
期刊：
影响因子：
7.2
通讯作者：
Havaux, Michel
中科院分区：
文献类型：
--
作者：
Havaux, Michel
类胡萝卜素在植物中扮演着重要的角色，包括抗氧化剂、辅助光收获色素、传粉媒介和种子传播者的吸引剂。类胡萝卜素的一个新功能最近被发现，它与植物对环境胁迫的反应有关。在胁迫条件下，叶绿体中产生的活性氧，特别是单线态氧，可以氧化类胡萝卜素，导致多种氧化产物，包括醛类、酮类、内过氧化物和内酯类。其中一些类胡萝卜素衍生物，如挥发性β -环柠檬醛，来源于β -胡萝卜素的氧化，是反应性亲电物质，具有生物活性，可以诱导基因表达的变化，从而适应应激条件。本文综述了类胡萝卜素的非酶氧化、裂解化合物的生物活性及其在植物中作为胁迫信号的功能。
Carotenoids are known to play important roles in plants as antioxidants, accessory light-harvesting pigments, and attractants for pollinators and seed dispersers. A new function for carotenoids has recently emerged, which relates to the response of plants to environmental stresses. Reactive oxygen species, especially singlet oxygen, produced in the chloroplasts under stress conditions, can oxidize carotenoids leading to a variety of oxidized products, including aldehydes, ketones, endoperoxides and lactones. Some of those carotenoid derivatives, such as volatile beta-cyclocitral, derived from the oxidation of beta-carotene, are reactive electrophile species that are bioactive and can induce changes in gene expression leading to acclimation to stress conditions. This review summarizes the current knowledge on the non-enzymatic oxidation of carotenoids, the bioactivity of the resulting cleavage compounds and their functions as stress signals in plants.