Conservation and Diversification of the Cold Stress Response in Higher Plants
摘要
Cold stress poses a significant challenge to plant development, leading to significant reductions in crop yield. While a few plants that are temperate, exemplified by Arabidopsis thaliana, exhibit internal adjustments to maintain metabolic machinery during cold temperatures through a procedure called “cold acclimation”, plants that are tropical or subtropical, like rice, show sensitivity to chilling stress. Temperate plants must first undergo cold acclimation, which involves to be exposed to low, freezing temperatures in order to prevent damage during subsequent freezing stress and to ensure the plant’s general health under low temperatures. Intricate physiological, biochemical, and molecular systems have been developed by plants to detect and react to low temperatures. Notably, two essential elements of this response are cytoskeletal rearrangement and membrane modifications. Calcium-binding proteins and calcium-dependent protein kinases are activated by the little increase in cytosolic calcium levels, which adds to the complex network of regulation during low-temperature stress. Furthermore, the plant response to cold stress is greatly affected by epigenetic regulation. This review compiles the most recent findings and advancements in our understanding of the tactics used by plants to withstand low temperatures. By examining the conservation and diversification of the cold stress response in higher plants, the main aim of the review is to provide valuable insights into the intricate molecular networks governing plant adaptation to cold environments. The integration of physiological, biochemical, and molecular perspectives enhances our understanding of the adaptive mechanisms that contribute to plant resilience under challenging low-temperature conditions.