设施黄瓜低温耐受性分子机制解析OA

Cucumber is one of the most important vegetable crops worldwide.However,due to its high sensitivity to low-temperature environments,low-temperature stress severely restricts the development of the cucumber industry.This paper systematically reviews the research progress on chilling tolerance in cucumber.Firstly,It describes the physiological effects of chilling stress on cucumber growth and development,including key physiological response indicators such as membrane lipid peroxidation,photosynthetic system damage and activation of antioxidant enzyme systems.Secondly,It focuses on analyzing the core molecular mechanisms underlying cucumber responses to low temperature,including both C-repeat binding factor(CBF)-dependent and CBF-independent signaling pathways,as well as the regulatory networks of endogenous hormones and signaling molecules such as abscisic acid,jasmonic acid,salicylic acid,ethylene,hydrogen sulfide,brassinosteroids and melatonin.Thirdly,it summarizes research advances in grafting technology,biostimulant application and genetic improvement strategies(traditional breeding and molecular breeding)for enhancing chilling tolerance in cucumber.Finally,it analyzes the current limitations in research on molecular network integration,gene function validation,rootstock-scion interaction mechanisms,the mechanisms of action of exogenous substances and studies on combined stresses.It also outlines future research directions,such as constructing a comprehensive regulatory network for low-temperature signaling,elucidating the regulatory mechanisms of low-temperature signal transport across organs and developing stress model that closely align with actual production conditions.This paper aims to provide a theoretical foundation and technical support for the genetic improvement of low-temperature tolerance in cucumbers and the sustainable development of the industry.