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The role of reactive oxygen species in the integration of temperature and light signals

机译:反应性氧物种在温度和光信号积分中的作用

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The remarkable plasticity of the biochemical machinery in plants allows the integration of a multitude of stimuli, enabling acclimation to a wide range of growth conditions. The integration of information on light and temperature enables plants to sense seasonal changes and adjust growth, defense, and transition to flowering according to the prevailing conditions. By now, the role of reactive oxygen species (ROS) as important signaling molecules has been established. Here, we review recent data on ROS as important components in the integration of light and temperature signaling by crosstalk with the circadian clock and calcium signaling. Furthermore, we highlight that different environmental conditions critically affect the interpretation of stress stimuli, and consequently defense mechanisms and stress outcome. For example, day length plays an important role in whether enhanced ROS production under stress conditions is directed towards activation of redox poising mechanisms or triggering programmed cell death (PCD). Furthermore, a mild increase in temperature can cause down-regulation of immunity and render plants more sensitive to biotrophic pathogens. Taken together, the evidence presented here demonstrates the complexity of signaling pathways and outline the importance of their correct interpretation in context with the given environmental conditions.
机译:生化机械在植物中的显着可塑性允许整合多种刺激,从而能够适应各种生长条件。灯光和温度信息的整合使植物能够根据主要条件感测季节性变化和调整生长,防御和过渡到开花。到目前为止,已经建立了反应性氧物质(ROS)作为重要信号传导分子的作用。在这里,我们审查最近关于ROS的数据作为串行时钟和钙信令集成光和温度信号传导的重要组成部分。此外,我们强调了不同的环境条件严重影响对压力刺激的解释,从而影响防御机制和应力结果。例如,日长度在压力条件下的增强ROS生产是针对激活氧化还原机制的激活或触发编程的细胞死亡(PCD)。此外,温度升高会导致免疫力下调,并使植物对生物营养病原体更敏感。在这里携带的证据表明了信令途径的复杂性,并概述了在给定的环境条件下对语境中正确解释的重要性。

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