Comprehensive Evaluation of Salt Tolerance of Seven Wild Poa annua at Seed Germination Stage

doi:10.11733/j.issn.1007-0435.2022.11.010

Acta Agrestia Sinica ›› 2022, Vol. 30 ›› Issue (11): 2937-2948.DOI: 10.11733/j.issn.1007-0435.2022.11.010

Comprehensive Evaluation of Salt Tolerance of Seven Wild Poa annua at Seed Germination Stage

LI Juan-xia¹, BAI Xiao-ming¹, ZHANG Cui², LIU Ya-na², RAN Fu¹, LI Ping¹, CHEN Hui¹

1. College of Pratacultural Science, Gansu Agricultural University, Key Laboratory of Grassland Ecosystem, Ministry of Education, Pratacultural Engineering Laboratory of Gansu Province;Sino-US Center for Grassland Ecosystem Sustainability, Lanzhou, Gansu Province 730070, China;
2. College of Forestry, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China

Received:2022-06-11 Revised:2022-08-14 Published:2022-12-02

7个野生一年生早熟禾种质萌发期耐盐性综合评价

李娟霞¹, 白小明¹, 张翠², 刘娅娜², 冉福¹, 李萍¹, 陈辉¹

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. 甘肃农业大学林学院, 甘肃兰州 730070

通讯作者: 白小明,E-mail:baixm@gsau.edu.cn
作者简介:李娟霞(1993-)，女，汉族，甘肃庄浪人，博士研究生，主要从事草坪草与环境研究，E-mail:1135459701@qq.com
基金资助:
国家自然科学基金项目(31560667);中国科协产业发展服务项目(2021XHQK002)资助

Abstract

Abstract: In order to provide a basis for screening of salt-tolerant varieties of Poa annua L.,seeds of seven wild annual bluegrass (Poa annua L.) were treated with different concentrations of NaCl and Na₂SO₄ during germination and the germination performance of these varieties were recorded. Results indicated that with the increase of NaCl and Na₂SO₄ concentrations,the relative germination rate,relative germination potential,relative germination index,and relative vigor index of all the seven varieties were inhibited,while the relative salt damage rate increased gradually,and the same salt concentration stress generally inhibited the relative root length more strongly than the relative shoot length. The seeds of Poa annua (Huangzhong) had the strongest tolerance to salt stress,and the inhibitory effect of Na₂SO₄on the germination was stronger than that of NaCl. The comprehensive evaluation of the membership function method showed that the salt tolerance of these varieties was in the order:Poa annua (Huangzhong)>Poa annua (Ganzhou)>Poa annua (Yongchang)>Poa annua (Anning)>Poa annua (Tianzhu)>Poa annua (Liangzhou)> Poa annua (Qinzhou). The results of this work indicate that Poa annua (Huangzhong) and Poa annua (Ganzhou) have the potential to develop and cultivate new salt-tolerant Poa annua varieties.

Key words: Poa annua, NaCl, Na₂SO₄, Germination characteristics, Salt tolerance

摘要： 本研究用不同浓度的NaCl和Na₂SO₄溶液处理7个野生一年生早熟禾(Poa annua L.)种子，通过测定种子萌发特性的变化，研究其萌发时的耐盐能力，以期为一年生早熟禾耐盐新品种的选育提供依据。结果表明，随着NaCl和Na₂SO₄胁迫浓度的增大，7个种质的相对发芽率、相对发芽势、相对发芽指数和相对活力指数均逐渐降低，相对盐害率逐渐增大，且同一盐浓度胁迫对相对根长的抑制普遍强于相对芽长。一年生早熟禾(湟中)种子萌发时对盐溶液的耐性最强，且Na₂SO₄对一年生早熟禾种子萌发的抑制作用大于NaCl。隶属函数法综合评价显示，7个种质萌发期耐盐性强弱依次为：一年生早熟禾(湟中)＞一年生早熟禾(甘州)＞一年生早熟禾(永昌)＞一年生早熟禾(安宁)＞一年生早熟禾(天祝)＞一年生早熟禾(凉州)＞一年生早熟禾(秦州)。综上，一年生早熟禾(湟中)和一年生早熟禾(甘州)具有培育耐盐一年生早熟禾新品种的开发应用潜力。

关键词: 一年生早熟禾, NaCl, Na₂SO₄, 萌发特性, 耐盐性

CLC Number:

LI Juan-xia, BAI Xiao-ming, ZHANG Cui, LIU Ya-na, RAN Fu, LI Ping, CHEN Hui. Comprehensive Evaluation of Salt Tolerance of Seven Wild Poa annua at Seed Germination Stage[J]. Acta Agrestia Sinica, 2022, 30(11): 2937-2948.

李娟霞, 白小明, 张翠, 刘娅娜, 冉福, 李萍, 陈辉. 7个野生一年生早熟禾种质萌发期耐盐性综合评价[J]. 草地学报, 2022, 30(11): 2937-2948.

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Comprehensive Evaluation of Salt Tolerance of Seven Wild Poa annua at Seed Germination Stage

7个野生一年生早熟禾种质萌发期耐盐性综合评价

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