The vegetable team of the Economic Research Institute of Hubei Academy of Agricultural Sciences has made research progress in the resistance of cucumber to low temperature stress
By: Date: 2022-07-18 Categories: Uncategorized
Low temperature stress will restrict the normal growth of plants, cause changes in cell composition and tissue structure, also affect plant metabolism, cause plant leaves to wilt, yellowing, necrosis, and even lead to plant wilting and death in serious cases. Cold acclimation is a common strategy to improve the resistance of plants to low temperature stress. A certain degree of cold acclimation can effectively improve the resistance of plants to low temperature stress. Cucumber (Cucumis sativus) is a kind of vegetable crop that likes temperature and is not resistant to cold. In actual production, low temperature is one of the important environmental factors that restrict the growth, yield and fruit quality of cucumber. However, the mechanism of improving the tolerance of cucumber to low temperature stress by cold acclimation is not clear.
 
The Plant Journal (if=7.09), an internationally renowned academic journal, recently published a research paper online entitled”heat shock induced cold adhesion in cucumber through cshsfa1d activated JA biosynthesis and signaling”. This study found that short-term high temperature pretreatment improved the resistance of cucumber seedlings to low temperature stress, which is a cold acclimation mode with unclear mechanism. Short term heat shock pretreatment (37 ℃, 2h) could up regulate the expression of cshsfa1d and improve the resistance of wild-type cucumber seedlings to low temperature stress (4 ℃, 12h). It was found that overexpression of cshsfa1d gene in Cucumber could significantly improve the tolerance of cucumber plants to low temperature stress. Biochemical experiments showed that overexpression of cshsfa1d gene could promote JA synthesis in Cucumber under low temperature, and the increase of JA content in the plant led to the degradation of csjaz5 protein, which released the interaction protein csice1 of csjaz5, activated the ice CBF cor signal pathway, and improved the tolerance of cucumber plants to low temperature stress.
 
Dr. Qi Chuandong, the vegetable team of our Institute of economics, is the first author of the paper, and our Institute of economics is the second completion unit. The research has been supported by national key research and development projects, Hubei Natural Science Foundation youth fund and other projects.
 
Paper link:https://onlinelibrary.wiley.com/doi/10.1111/tpj.15780