Apoplastic and chloroplastic redox signaling networks in plant stress responses.
Apoplastic and chloroplastic redox signaling networks in plant stress responses.
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DOI：
10.1089/ars.2012.5016
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发表时间：
2013-04
影响因子：
6.6
通讯作者：
Maija Sierla;Moona Rahikainen;J. Salojärvi;J. Kangasjärvi;Saijaliisa Kangasjärvi
中科院分区：
文献类型：
--
作者：
Maija Sierla;Moona Rahikainen;J. Salojärvi;J. Kangasjärvi;Saijaliisa Kangasjärvi
意义 质外体和叶绿体氧化还原信号网络之间的相互作用正在成为植物胁迫反应的关键机制。最新进展 最近的研究揭示了参与质外体和叶绿体氧化还原信号传导的成分。此外，从应激感知、质外体活性氧（ROS）通过NADPH氧化酶爆发、细胞质和叶绿体Ca(2+)-瞬变以及细胞器氧化还原信号到生理反应的激活的一系列事件开始出现。此外，光合活性组织中的光适应和植物免疫之间的功能重叠已被证明。关键问题任何与基础细胞氧化还原平衡的偏差都可能引起适应反应，从而不断重新调整细胞功能。然而，将资源转移到应激反应可能会导致生长减弱，因此过度的防御反应可能对植物有害。因此，适应反应的最终结果必须受到细胞器和质外体信号系统之间的氧化还原信号网络的严格控制。未来方向仍有两个主要问题有待解决：ROS 的感觉机制以及将信号从质外体传递到叶绿体所涉及的成分。对监管网络的全面了解将有助于了解环境因素如何影响植物中植物营养素和生物量的产生。将这些信息从模型植物转化为作物物种将成为不久的将来研究的前沿。这些挑战为未来研究光合生物应激适应的活性氧和氧化还原调节提供了框架。
SIGNIFICANCE Interplay among apoplastic and chloroplastic redox signaling networks is emerging as a key mechanism in plant stress responses. RECENT ADVANCES Recent research has revealed components involved in apoplastic and chloroplastic redox signaling. Also, the sequence of events from stress perception, activation of apoplastic reactive oxygen species (ROS) burst through NADPH oxidases, cytoplasmic and chloroplastic Ca(2+)-transients, and organellar redox signals to physiological responses is starting to emerge. Moreover, a functional overlap between light acclimation and plant immunity in photosynthetically active tissues has been demonstrated. CRITICAL ISSUES Any deviations from the basal cellular redox balance may induce acclimation responses that continuously readjust cellular functions. However, diversion of resources to stress responses may lead to attenuation of growth, and exaggeration of defensive reactions may thus be detrimental to the plant. The ultimate outcome of acclimation responses must therefore be tightly controlled by the redox signaling networks between organellar and apoplastic signaling systems. FUTURE DIRECTIONS Two major questions still remain to be solved: the sensory mechanism for ROS and the components involved in relaying the signals from the apoplast to the chloroplast. A comprehensive view of regulatory networks will facilitate the understanding on how environmental factors affect the production of phytonutrients and biomass in plants. Translation of such information from model plants to crop species will be at the cutting edge of research in the near future. These challenges give a frame for future studies on ROS and redox regulation of stress acclimation in photosynthetic organisms.