干旱胁迫对不同种源长柄扁桃生理特性的影响  

Effect of Drought Stress on Physiological Characteristics of Amygdalus pedunculata with Different Provenances

作　　者：蒋晋豫[1,2,3] 施智宝 李云 刘永华[4] 郝新忠[2] 艾茹 JIANG Jin-yu;SHI Zhi-bao;LI Yun;LIU Yong-hua;HAO Xin-zhong;AI Ru(National Engineering Laboratory for Tree Breeding,College of Biological Sciences and Technology,Beijing Forestry University,Beijing 100083;Shaanxi Academy of Forestry,Xi'an Shaanxi 710082;Amygdalus pedunculata Engineering Technology Research Center,State Forestry and Grassland Administration,Yulin,Shaanxi 719000;Yulin College,Yulin,Shaanxi 719000)

机构地区：[1]北京林业大学林木育种国家工程实验室/生物科学与技术学院,北京100083 [2]陕西省林业科学院,西安710082 [3]国家林业草原长柄扁桃工程技术研究中心 [4]榆林学院,陕西榆林719000

出　　处：《陕西林业科技》2020年第4期5-9,共5页Shaanxi Forest Science and Technology

基　　金：陕西省科技厅重点研发计划项目(2017NY-40)。

摘　　要：以长柄扁桃抗旱性较强的榆林榆阳种源和抗旱性较弱的河北丰宁种源所育1 a生幼苗为材料,研究了干旱胁迫条件下长柄扁桃两个种源的生理生化指标变化。结果显示随干旱胁迫增强,两个种源长柄扁桃叶片相对含水量(LRWC)、质膜透性(RPMP)和可溶性蛋白(SP)呈负相关,均成下降趋势,并且抗旱性较弱的河北丰宁长柄扁桃比榆林榆阳长柄扁桃的变化幅度大;丙二醛(MDA)含量、游离脯氨酸(Pro)含量、超氧化物歧化酶(SOD)和过氧化物酶(POD)活性,随着干旱胁迫时间的延长而显著增加,干旱胁迫到40 d后,有明显的下降趋势;耐旱较强的榆林榆阳种源长柄扁桃活性值或含量比河北丰宁种源高。With 1 a seedlings of Amygdalus pedunculata from Yulin provenance which performs well in stress resistance and provenance from Hebei as study materials,the physiological indicators were analyzed.The results showed that under drought stress,relative water content(LRWC),membrane permeability(RPMP)and soluble protein(SP)were negatively correlated in malondialdehyde(MDA)content in leaves of A.pedunculata,free proline(Pro)content,superoxide dismutase(SOD)and peroxidase(POD)activity increased significantly with the extension of drought stress time.After drought stress for 40 d,there was a significant downward trend;the activity value or content of A.pedunculata in Yuyang provenance with strong drought tolerance was higher than that in Fengning provenance of Hebei province.

关 键 词：长柄扁桃 干旱胁迫 丙二醛 脯氨酸 种源 叶片 

分 类 号：S888.2[农业科学—特种经济动物饲养]