The Impact of Global Change Factors on Redox Signaling Underpinning Stress Tolerance
The Impact of Global Change Factors on Redox Signaling Underpinning Stress Tolerance
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DOI：
10.1104/pp.112.205690
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发表时间：
2013-01-01
期刊：
影响因子：
7.4
通讯作者：
Foyer, Christine H.
中科院分区：
文献类型：
--
作者：
Munne-Bosch, Sergi;Queval, Guillaume;Foyer, Christine H.
还原/氧化（氧化还原）代谢和相关信号是植物对生物和非生物胁迫的交叉耐受性的关键组成部分。气候变化因素，如预测的温度升高和大气中二氧化碳（CO2）和臭氧（O-3）的可用性将对植物中的氧化信号产生深远的影响，特别是与光合代谢和环境胁迫反应有关。氧化还原信号传导通过影响代谢和引发一系列氧化爆发产生酶的激活来响应无数环境信号，其功能是增强质外体/细胞壁环境的氧化状态。与活性氧（ROS）一样，低分子抗氧化剂（如抗坏血酸盐、谷胱甘肽、生育酚和类胡萝卜素）和抗氧化酶的丰度也会受到环境触发因素的影响。氧化剂和抗氧化剂不在孤立的线性氧化还原信号通路中起作用。相反，它们是一个更大的胁迫信号网络的一部分，该网络整合了来自许多途径的信息，包括激素和糖，以调节植物生长和防御反应。在这里，我们探讨了氧化剂和抗氧化剂对全球变化因素的可能反应，并讨论了它们如何改变基因表达，通过改变应激反应影响整体植物适应性。
Reduction/oxidation (redox) metabolism and associated signaling are key components of cross tolerance to biotic and abiotic stresses in plants. Climate change factors such as predicted increases in temperature and the availability of atmospheric carbon dioxide (CO2) and ozone (O-3) will have a profound effect on oxidative signaling in plants, particularly in relation to photosynthetic metabolism and environmental stress responses. Redox signaling is responsive to myriad environmental signals through influences on metabolism and the triggered activation of the suite of oxidative burst-generating enzymes, whose function is to enhance the oxidation state of the apoplast/cell wall environment. Like reactive oxygen species (ROS), the abundance of low molecular antioxidants such as ascorbate, glutathione, tocopherols and carotenoids, and antioxidant enzymes is modified by environmental triggers. Oxidants and antioxidants do not operate in isolated linear redox signaling pathways. Rather, they are part of a much larger stress signaling network that integrates information from many pathways including hormones and sugars to regulate plant growth and defense responses. Here, we explore the likely responses of oxidants and antioxidants to global change factors and discuss how they might modify gene expression, influencing overall plant fitness through altered stress responses.