低温胁迫对4种卫矛属植物抗寒生理指标的影响  

Effects of low temperature stress on physiological indexes of cold resistance of four species in the genus Euonymus

作　　者：杨航宇 刘长仲[1] YANG Hang-yu;LIU Chang-zhong(College of Grassland Science,Gansu Agricultural University/Key Laboratory for Grassland Ecosystem of Ministry of Education/Pratacultural Engineering Laboratory of Gansu Province/Sino-U.S.Centers for Grazing Land Ecosystem Sustainability,Lanzhou 730070,China;Gansu Forestry Technology College,Tianshui 741020,China)

机构地区：[1]甘肃农业大学草业学院/草业生态系统教育部重点实验室/甘肃省草业工程实验室/中-美草地畜牧业可持续发展研究中心,甘肃兰州730070 [2]甘肃林业职业技术学院,甘肃天水741020

出　　处：《草原与草坪》2020年第2期92-98,共7页Grassland and Turf

基　　金：甘肃省科技计划(技术创新引导计划)(17CX1 ZE045);甘肃省自然科学基金(B类)(1610RJZE133);甘肃省高等学校科研项目(17jyt245)资助。

摘　　要：以一年生离体枝条为试验材料,进行人工模拟降温处理,处理温度分别为5,0,-5,-10℃,以5℃为对照,测定不同低温处理下4种卫矛属植物丙二醛(MDA)、游离脯氨酸(Pro)以及超氧化物歧化酶(SOD)、过氧化物酶(POD)活性等4项指标,并运用隶属函数法对其抗寒性进行综合评价。结果表明:低温胁迫下,4种卫矛属植物枝叶内的MDA和Pro含量,SOD和POD活性,均显著高于对照(5℃)(P<0.05);4种卫矛属植物抗寒性强弱的排序为:无柄卫矛>刺果卫矛>胶州卫矛>扶芳藤。In order to screen the plants of the genus Euonymus with cold resistance for suitable promotion in the northwestern region,the one-year isolated branch in 4 kinds of plant in Euonymus were used as a test material to conduct field freeze damage investigation.The four indexes of malondialdehyde(MDA),free proline(Pro),superoxide dismutase(SOD)and POD activity were determined at different low temperatures,the use of membership function method for the cold resistance of the species comprehensive analysis and evaluation.The results showed that MDA content,Pro content,SOD activity and POD activity were significantly higher in leaves of the four species of Euonymus under low temperature stress than those without cold stress(5℃)(P<0.05).The results of physiological and biochemical indexes and membership functions for the evaluation of the cold resistance of four species of Euonymus were basically consistent with the field survey results.The order of cold resistance of four species in Euonymus was as follows:E.subsessilis>E.acanthocarpus>E.kiautschovicus>E.fortunei.

关 键 词：低温胁迫 卫矛属植物 抗寒指标 隶属函数法 

分 类 号：S718.43[农业科学—林学]