Department of Plant and Microbial Biology, University of Minnesota, Saint Paul, MN, 55108, USA.
New Phytol. 2021 Jul;231(1):40-46. doi: 10.1111/nph.17367. Epub 2021 Apr 30.
Throughout plant evolution the circadian clock has expanded into a complex signaling network, coordinating physiological and metabolic processes with the environment. Early land plants faced new environmental pressures that required energy-demanding stress responses. Integrating abiotic stress response into the circadian system provides control over daily energy expenditure. Here, we describe the evolution of the circadian clock in plants and the limited, yet compelling, evidence for conserved regulation of abiotic stress. The need to introduce abiotic stress tolerance into current crops has expanded research into wild accessions and revealed extensive variation in circadian clock parameters across monocot and eudicot species. We argue that research into the ancestral links between the clock and abiotic stress will benefit crop improvement efforts.
在植物进化过程中，生物钟扩展成为一个复杂的信号网络，协调生理和代谢过程与环境的关系。早期的陆地植物面临着新的环境压力，需要能量消耗的应激反应。将非生物胁迫反应整合到生物钟系统中可以控制每日的能量消耗。在这里，我们描述了植物生物钟的进化，以及有限但引人注目的非生物胁迫调控的保守性证据。将非生物胁迫耐受性引入到现有作物中的需求，扩大了对野生植物的研究，揭示了单子叶植物和双子叶植物物种中生物钟参数的广泛变化。我们认为，研究生物钟与非生物胁迫之间的祖先联系将有益于作物改良的努力。
