干旱胁迫下不同种源文冠果幼苗叶片的抗旱生理响应特征  

Characteristics of Physiological Responses for Leaves of Xanthoceras sorbifolia Seedlings from Different Provenances to Drought Resistance

作　　者：邢钰坤 曹恭祥[1,2] 元光 杨跃文 郝笑明[1] 李银祥 王志波 季蒙[1,2] 张月芳 XING Yu-kun;CAO Gong-xiang;YUAN Guang;YANG Yue-wen;HAO Xiao-ming;LI Yin-xiang;WANG Zhi-bo;JI Meng;ZHANG Yue-fang(Inner Mongolia Academy of Forestry,Hohhot 010010,China;Ordos Forest Ecosystem Research Station,Inner Mongolia,Ordos 016100,China;West Ujimqin Banner Forestry Development Center,Xilin Gol League,Inner Mongolia,Xilin Gol 026200,China;Zhuozi County Garden Service Center,Ulanqab City,Inner Mongolia,Ulanqab 012300,China)

机构地区：[1]内蒙古自治区林业科学研究院,内蒙古呼和浩特010010 [2]内蒙古鄂尔多斯森林生态系统国家定位观测研究站,内蒙古鄂尔多斯016100 [3]西乌珠穆沁旗林业事业发展中心,内蒙古锡林郭勒026200 [4]卓资县园林服务中心,内蒙古乌兰察布012300

出　　处：《内蒙古林业科技》2021年第4期25-30,共6页Journal of Inner Mongolia Forestry Science and Technology

基　　金：内蒙古自治区科技计划项目“多功能抗逆树种文冠果优良种质选育和栽培技术研究”(2019GG005)。

摘　　要：以1 a生文冠果盆栽苗为材料,采用盆栽控水试验法,测定了持续干旱胁迫对4个种源文冠果幼苗生长和生理指标的影响,分析了叶片相对含水量、游离脯氨酸含量、丙二醛、超氧化物岐化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)等抗旱指标。结果表明:4个种源文冠果叶片相对含水量随干旱胁迫程度的增加而逐渐减少,叶片相对含水量变化幅度存在一定差异;随着干旱胁迫程度的增加,各种源游离脯氨酸含量大量积累,其含量增长2~3.5倍;丙二醛含量随干旱胁迫程度的增加整体呈上升趋势;而3种植物保护酶的活性随干旱胁迫程度的增加总体呈先升后降的趋势,SOD和CAT的活性变化增强主要在胁迫初期,POD活性变化主要表现在胁迫中后期。Taking one-year potted seedlings of Xanthocorpa sorbifolia as test material,the effects of continuous drought stress on growth and physiological index of seedlings were measured by use of potted water-controlling experiment.Through the analysis on RWC,Pro,MDA,SOD,POD and CAT of leaves of Xanthocorpa sorbifolia,the results showed that with the increase of drought stress degree,RWC of four provenances decreased in different changing range,Proline content of different provenances accumulated and increased by 2-3.5 times,MDA increased as a whole.The activity of three plant protective enzymes showed a trend of increasing first and then decreasing.The activity of SOD and CAT increased in the early stage of drought stress,and the activity of POD increased mainly in the later stage of drought stress.

关 键 词：文冠果 种源 抗旱性 鄂尔多斯高原 

分 类 号：S565.9[农业科学—作物学]