期刊
CELLS
卷 11, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/cells11071154
关键词
ABA signaling; abiotic stress; central oscillator; circadian clock; plant fitness
类别
资金
- Einstein Foundation Berlin program
Plants have molecular, physiological, and anatomical adaptations to cope with long-term water-deficit exposure, which are controlled by circadian clocks. The circadian clock regulates plants' responses to water deficiency, including the opening and closing of stomata, through the modulation of ABA. However, the interrelationship between circadian clock, ABA homeostasis, and signaling and water-deficit responses is not fully understood. This review hypothesizes that the circadian clock directs plants to modulate their responses and feedback mechanisms to ensure survival and enhance fitness under drought conditions.
Plants deploy molecular, physiological, and anatomical adaptations to cope with long-term water-deficit exposure, and some of these processes are controlled by circadian clocks. Circadian clocks are endogenous timekeepers that autonomously modulate biological systems over the course of the day-night cycle. Plants' responses to water deficiency vary with the time of the day. Opening and closing of stomata, which control water loss from plants, have diurnal responses based on the humidity level in the rhizosphere and the air surrounding the leaves. Abscisic acid (ABA), the main phytohormone modulating the stomatal response to water availability, is regulated by circadian clocks. The molecular mechanism of the plant's circadian clock for regulating stress responses is composed not only of transcriptional but also posttranscriptional regulatory networks. Despite the importance of regulatory impact of circadian clock systems on ABA production and signaling, which is reflected in stomatal responses and as a consequence influences the drought tolerance response of the plants, the interrelationship between circadian clock, ABA homeostasis, and signaling and water-deficit responses has to date not been clearly described. In this review, we hypothesized that the circadian clock through ABA directs plants to modulate their responses and feedback mechanisms to ensure survival and to enhance their fitness under drought conditions. Different regulatory pathways and challenges in circadian-based rhythms and the possible adaptive advantage through them are also discussed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据