Interactions between cytokinin signalling and abiotic stress responses.
Interactions between cytokinin signalling and abiotic stress responses.
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DOI：
10.1093/jxb/erv172
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发表时间：
2015-08
影响因子：
6.9
通讯作者：
Paul J. Zwack;A. Rashotte
中科院分区：
文献类型：
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作者：
Paul J. Zwack;A. Rashotte
植物已经进化出复杂的机制来感知和响应次优的环境条件。由这些条件引起的非生物胁迫触发了广泛的局部和远程信号，这些信号必须协调并整合到整个植物过程中，如发育，以便植物正确反应和生存。有几种荷尔蒙起着压力耐受性的关键调节作用，将局部刺激与全身反应联系起来。细胞分裂素是一种激素，因其在生长和发育的许多方面的作用而广为人知，尽管大量证据也表明细胞分裂素在应激反应中也起作用。目前，对细胞分裂素在植物抗逆性中的作用缺乏充分的了解，这可能是由于细胞分裂素与逆境信号之间复杂的相互作用所致。本文从应激条件下细胞分裂素水平的测定和细胞分裂素治疗对应激耐受性的影响两方面对细胞分裂素与非生物应激之间的生理关系的研究现状进行了综述。在不同的植物物种中，细胞分裂素对逆境相关基因的转录调控模式也已被确定。此外，关于特定的细胞分裂素信号成分在各种应激反应中的作用的研究也被提出。关于细胞分裂素和非生物胁迫耐受性之间的相互作用，我们讨论了这一系列研究的共同含义。
Plants have evolved elaborate mechanisms for sensing and responding to sub-optimal environmental conditions. Abiotic stresses caused by these conditions trigger a wide range of local and long-distance signals which must be co-ordinated and integrated into whole-plant processes, such as development, in order for the plant to respond properly and survive. Several hormones function as key regulators of stress tolerance, connecting local stimuli to systemic responses. Cytokinin is a hormone well known for its role in numerous aspects of growth and development, although abundant evidence also indicates that cytokinin functions in stress responses as well. At present, a full understanding of the effects of cytokinin on plant resistance to stress is lacking, possibly as a result of the complex interactions between cytokinin and stress signalling. Current knowledge of the physiological relationship between cytokinin and abiotic stress, based on measurements of cytokinin levels under stress conditions and the effects of cytokinin treatment on stress tolerance, has been examined here. A pattern of transcriptional regulation of stress-related genes by cytokinin in different plant species has also been identified. In addition, research regarding the role of specific cytokinin signalling components in a variety of stress responses is presented. We discuss what this body of research collectively implies with regard to cross-talk between cytokinin and abiotic stress tolerance.