State Key Laboratory of Plant Physiology and Biochemistry, National Center of Plant Gene Research (Beijing), College of Biological Sciences, China Agricultural University, Beijing 100193, China.
Annu Rev Plant Biol. 2013;64:451-76. doi: 10.1146/annurev-arplant-050312-120153. Epub 2013 Jan 16.
As one of the most important mineral nutrient elements, potassium (K(+)) participates in many plant physiological processes and determines the yield and quality of crop production. In this review, we summarize K(+) signaling processes and K(+) transport regulation in higher plants, especially in plant responses to K(+)-deficiency stress. Plants perceive external K(+) fluctuations and generate the initial K(+) signal in root cells. This signal is transduced into the cytoplasm and encoded as Ca(2+) and reactive oxygen species signaling. K(+)-deficiency-induced signals are subsequently decoded by cytoplasmic sensors, which regulate the downstream transcriptional and posttranslational responses. Eventually, plants produce a series of adaptive events in both physiological and morphological alterations that help them survive K(+) deficiency.
作为最重要的矿物质营养元素之一，钾（K(+)）参与了许多植物生理过程，决定了作物生产的产量和质量。在这篇综述中，我们总结了高等植物中的 K(+)信号转导过程和 K(+)转运调控，特别是在植物对 K(+)-缺乏胁迫的响应中。植物感知外部 K(+)波动，并在根细胞中产生初始 K(+)信号。该信号在细胞质中被转导，并编码为 Ca(2+)和活性氧信号。随后，细胞质传感器对 K(+)-缺乏诱导的信号进行解码，调节下游的转录和翻译后反应。最终，植物在生理和形态改变方面产生一系列适应性事件，帮助它们在 K(+)缺乏时存活。
