喷施外源油菜素内酯对美乐葡萄幼苗抗低温胁迫的影响  

Effects of exogenous brassinolide on the resistance of Merlot grape seedlings to low temperature stress

作　　者：郭学良 汪月宁 刘妍[1] 殷梦婷 贺琰 王振平[1] 代红军[1] Guo Xueliang;Wang Yuening;Liu Yan;Yin Mengting;He Yan;Wang Zhenping;Dai Hongjun(School of Agricultural,Ningxia University,Yinchuan 750021,China)

机构地区：[1]宁夏大学农学院,宁夏银川750021

出　　处：《农业科学研究》2023年第2期19-24,共6页Journal of Agricultural Sciences

基　　金：宁夏自然科学基金项目(2020AAC03088);国家现代农业产业技术体系资助项目(CARS-29-zp-03)。

摘　　要：以美乐葡萄营养袋扦插苗为试材,喷施0.4 mg/L的EBR,置于不同低温(4、0、-2℃)下4 h,研究EBR对美乐葡萄幼苗抗寒性的影响,为酿酒葡萄抗寒性的研究提供理论依据。结果显示:EBR处理提高了美乐葡萄叶片的过氧化氢酶(CAT)、超氧化物歧化酶(SOD)和过氧化物酶(POD)的活性,增加了葡萄叶片中可溶性糖和脯氨酸含量,减少了电导率和丙二醛(MDA)含量。SOD活性和脯氨酸含量分别比对照提高了32.12%、29.61%,MDA含量比CK处理降低了46.98%。EBR处理提高了美乐葡萄幼苗的抗寒性。The effects of 0.4 mg/L EBR on the cold resistance of Merlot grape seedlings were studied by spraying it on the cutting seedlings of Merlot grape and placing them at different low temperatures of 4℃,0℃and-2℃for 4 hours,which can provide a theoretical basis for the research on the cold resistance of wine grapes.The results show that the EBR treatment improved the activity of catalase(CAT),superoxide dismutase(SOD)and peroxidase(POD)in the leaves,increased the content of soluble sugar and proline,and decreased the conductivity and malondialdehyde(MDA)content.The SOD activity and proline content increased by 32.12%and 29.61%compared to the control,respectively,and the MDA content decreased by 46.98%compared to the group with CK treatment.EBR treatment improved the cold resistance of wine grape Merlot seedlings.

关 键 词：低温胁迫 外源油菜素内酯 美乐葡萄 

分 类 号：S663.1[农业科学—果树学]