Hormonal Regulation of Cold Stress Response
Phytohormones play an important role in every aspect of plant growth and development. Studies of hormonal biosynthesis, signaling, and transportation pathway facilitate our understanding for the basic developmental mechanisms. As a sessile organism, inability of plants to escape the adverse conditions is manifested through the alteration of growth parameters. These growth parameters are mainly regulated through phytohormone content, perception, and transport. Hormonal perception and regulation as a response of biotic and abiotic stresses have been studied from the model plant Arabidopsis thaliana to crop plants. In the era of uncertain climate condition, temperature stress (both high and low) has become a major limiting factor for plant growth and crop productivity. Recent progress in hormonal study revealed important roles of majority of the phytohormones in low-temperature stress response. However, the mechanistic explanation of responses of different hormones under cold stress is far from understood. In this chapter, we tried to provide a comprehensive summary of our existing knowledge linking hormones and cold stress and discuss about the possible mechanistic basis of response pathways and the future research direction that may help to develop cold-resistant crop varieties to meet the upcoming global food crisis.
KeywordsCold stress Phytohormones
Research in Abidur Rahman’s lab is funded by several grants by JSPS Kakenhi and Iwate University. Arif Ashraf was supported by MEXT fellowship.
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