E3泛素连接酶调控园艺作物非生物胁迫响应的分子机制及展望OA

Horticultural crops play a vital role in daily diets and national economies.However,their growth and development are frequently threatened by abiotic stresses,leading to reduced yield and compromised quality.As core regulators of the ubiquitin-proteasome system(UPS),E3 ubiquitin ligases precisely control protein degradation or functional activation by specifically recognizing target proteins and mediating covalent ubiquitination modifications,and plays a vital role in the response of horticultural crops to abiotic stresses.This study systematically summarizes the classification characteristics,catalytic mechanisms,and molecular roles of E3 ubiquitin ligases in abiotic stress responses,with a focus on their regulatory functions under drought,high salinity,and extreme temperature stresses.Meanwhile,this paper reveals the molecular network of E3 ubiquitin ligase participating in stress response through hormone pathways such as abscisic acid(ABA)and jasmonic acid(JA).In addition,this study proposes molecular design breeding strategies based on E3 ubiquitin ligases and outlines future research directions,aiming to provide new theoretical foundations and technical approaches for the genetic improvement of stress tolerance in horticultural crops.