UV-B胁迫对辣椒叶片防御酶活性及丙二醛含量的影响  

Effects of UV-B Stress on Defense Enzyme Activity andMalondialdehyde Content in Pepper Leaves

作　　者：董文堂 陈艳 邵登魁[1,2,3,4] 邓昌蓉 DONG Wentang;CHEN Yan;SHAO Dengkui;DENG Changrong(Qinghai University,Xining Qinghai 810016,China;Qinghai Academy of Agriculture and Forestry Science,Xining Qinghai 810016,China;Qinghai Provincial Key Laboratory of Vegetable Genetics and Physiology,Xining Qinghai 810016,China;Research and Utilization Laboratory of Qinghai-Tibet Plateau Germplasm Resources,Xining Qinghai 810016,China)

机构地区：[1]青海大学,青海西宁810016 [2]青海省农林科学院,青海西宁810016 [3]青海省蔬菜遗传与生理重点实验室,青海西宁810016 [4]青藏高原种质资源研究与利用实验室,青海西宁810016

出　　处：《青海农林科技》2024年第2期86-91,共6页Science and Technology of Qinghai Agriculture and Forestry

基　　金：青海省科技厅基础研究计划—青年项目(2022-ZJ-947Q)。

摘　　要：为筛选抗紫外线UV-B辣椒品种,助力青藏高原地区辣椒产业发展,本试验以青海省特色品种青椒3号、循化线椒、甘科-2-11及吉祥101品种为试验材料,研究不同UV-B(20.05μW/cm 2)胁迫时间对辣椒叶片中过氧化物酶(POD)、过氧化氢酶(CAT)、超氧化物歧化酶(SOD)活性,以及丙二醛(MDA)含量的影响。结果显示:随着UV-B胁迫时间的延长,POD、CAT及SOD活性均呈现先升高后降低的趋势,于处理第2 d和3 d达到最大,而丙二醛(MDA)含量则呈现先升高后降低再升高的趋势,分别于试验处理第2 d和4 d达到最大。综合以上4个指标,通过隶属函数分析得出4个辣椒品种的耐紫外性依次为青椒3号>循化线椒>甘科-2-11>吉祥101,因此推测青椒3号是耐紫外线强的辣椒品种,适合在青藏高原种植。In order to screen ultraviolet-resistant UV-B pepper varieties and help the development of pepper industry in the Qinghai-Tibet Plateau,the effects of different UV-B(20.05μW/cm 2)stress times on the activities of peroxidase(POD),catalase(CAT),superoxide dismutase(SOD)and malondialdehyde(MDA)in pepper leaves were studied in this experiment,which were used as materials to study the characteristic varieties Qingjiao 3,Xunhua Xianjiao,Ganke-2-11 and Jixiang 101 varieties in Qinghai Province.The results showed that with the extension of UV-B stress time,the activities of POD,CAT and SOD increased first and then decreased,reaching the maximum on the second and third days of treatment,while the content of malondialdehyde(MDA)increased first,then decreased and then increased,reaching the maximum on the second and fourth days of experimental treatment,respectively.Based on the above four indexes,the membership function analysis showed that the ultraviolet tolerance of the four pepper varieties was Qingjiao No.3>Xunhua line pepper>Ganke-2-11>Jixiang 101,so it was speculated that Qingjiao No.3 was a pepper variety with strong ultraviolet resistance and was suitable for planting in the Qinghai-Tibet Plateau.

关 键 词：辣椒 紫外胁迫 防御酶活性 丙二醛 

分 类 号：S641.3[农业科学—蔬菜学]