Comprehensive Evaluation of Drought Resistance of Eight Elymus Germplasms at Seedling Stage

doi:10.11733/j.issn.1007-0435.2020.02.013

Acta Agrestia Sinica ›› 2020, Vol. 28 ›› Issue (2): 397-404.DOI: 10.11733/j.issn.1007-0435.2020.02.013

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Comprehensive Evaluation of Drought Resistance of Eight Elymus Germplasms at Seedling Stage

WANG Ping¹, WANG Pei¹, SUN Wan-bin², CHEN Jiu-hong¹, ZHANG Wei¹, ZHOU Qing-ping¹

1. Institute of Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu, Sichuan Province 610041, China;
2. Pratacultural College, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China

Received:2019-12-02 Revised:2020-01-02 Online:2020-04-15 Published:2020-04-11

8份披碱草属牧草苗期抗旱性综合评价

王平¹, 王沛¹, 孙万斌², 陈玖红¹, 张伟¹, 周青平¹

1. 西南民族大学青藏高原研究院, 四川成都 610041;
2. 甘肃农业大学草业学院, 甘肃兰州 730070

通讯作者: 周青平
作者简介:王平(1993-),男,甘肃天水人,硕士研究生,主要从事牧草逆境生理研究,E-mail:wangpingswmu@yeah.net
基金资助:
国家牧草产业技术体系（CAR-34）；国家自然科学基金项目（31802122）；青藏高原生态畜牧协调创新中心开放基金（QZGYXT04）资助

Abstract

Abstract: The aim of this work was to explore the drought resistance ability of eight Elymus germplasms,theygrown in pots were treated by drought stress and rewatered. The drought response indexes including relative conductivity (REC),relative water content (RWC),malondialdehyde (MDA) and chlorophyll (Chl) in leaves among eight germplasms were analyzed. The result showed that the eight germplasms had different degrees of drought adaptability. When compared with other germplasms,the indexes of E05 were slightly influenced by drought treatment and recovered obviously under rewater treatment,which indicated that E05 had stronger drought adaptability. Based on the subordinate function analysis of four physiological characteristics (REC,RWC,MDA and Chl), the rank order of drought resistance in these Elymus germplasms were as follows:E. nutans (E05) > E. nutans (E08) > E. nutans (E06) > E. sibiricus (E01) > E. sibiricus (E03) > E. nutans (E07) > E. sibiricus (E02) > E. sibiricus (E04). In summary,E. nutans (E05) with less annual precipitation (319.25 mm) in the collection area showed stronger drought resistance during the long-term adaptation to drought.

Key words: Elymus, Drought resistance, Drought stress, Rewater, Subordination function

摘要： 本试验对室内盆栽的8份披碱草属（Elymus L.）牧草进行干旱处理，通过分析干旱胁迫和复水下各种质资源叶片的相对电导率、相对含水量、丙二醛、叶绿素等8项生理指标的干旱胁迫指数，探究各种质资源间苗期抗旱性的差异。结果表明，在干旱及复水处理下，各种质表现出了不同程度的干旱适应性，其中E05的干旱适应性较强，表现为各项指标在干旱处理下变化较小，且在复水处理下恢复较明显。对各种质资源相对含水量、叶绿素含量、相对电导率和丙二醛四项生理指标进行隶属函数分析，得出其抗旱性从强到弱依次为：E05 > E08 > E06 > E01 > E03 > E07 > E02 > E04。综上所述，采集地年均降水量较少（319.25 mm）的垂穗披碱草（E. nutans，编号E05）在长期适应干旱少雨的过程中，表现出更强的抗旱能力。

关键词: 披碱草属, 抗旱性, 干旱胁迫, 复水, 隶属函数

CLC Number:

Q945.78

WANG Ping, WANG Pei, SUN Wan-bin, CHEN Jiu-hong, ZHANG Wei, ZHOU Qing-ping. Comprehensive Evaluation of Drought Resistance of Eight Elymus Germplasms at Seedling Stage[J]. Acta Agrestia Sinica, 2020, 28(2): 397-404.

王平, 王沛, 孙万斌, 陈玖红, 张伟, 周青平. 8份披碱草属牧草苗期抗旱性综合评价[J]. 草地学报, 2020, 28(2): 397-404.

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Comprehensive Evaluation of Drought Resistance of Eight Elymus Germplasms at Seedling Stage

8份披碱草属牧草苗期抗旱性综合评价

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