Characterization of the Salt Tolerance of Transgenic Arabidopsis Thaliana Overexpression of MsLEA4-4 from Medicago Sativa

doi:10.11733/j.issn.1007-0435.2020.03.002

Acta Agrestia Sinica ›› 2020, Vol. 28 ›› Issue (3): 597-605.DOI: 10.11733/j.issn.1007-0435.2020.03.002

Characterization of the Salt Tolerance of Transgenic Arabidopsis Thaliana Overexpression of MsLEA4-4 from Medicago Sativa

JIA Hui-li^1,2, WANG Xue-min³, GAO Tao², SHI Yong-hong², WANG Yun-qi², WU Xin-ming², LIU Jian-ning², FANG Zhi-hong², DONG Kuan-hu¹

1. Shanxi Agricultural University, Taigu, Shanxi Province 030801, China;
2. Animal Husbandry and Veterinary Institute, Shanxi Academy of Agricultural Sciences, Taiyuan, Shanxi Province 030032, China;
3. Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China

Received:2020-01-16 Revised:2020-02-16 Online:2020-06-15 Published:2020-05-30

转MsLEA4-4基因拟南芥株系的耐盐性分析

贾会丽^1,2, 王学敏³, 高涛², 石永红², 王运琦², 吴欣明², 刘建宁², 方志红², 董宽虎¹

1. 山西农业大学, 山西太谷 030801;
2. 山西省农业科学院畜牧兽医研究所, 山西太原 030032;
3. 中国农业科学院北京畜牧兽医研究所, 北京 100193

通讯作者: 董宽虎
作者简介:贾会丽(1980-),女,山西临猗人,副研究员,博士研究生,主要从事牧草种质资源与育种研究,E-mail:jiahuili333@126.com;
基金资助:
现代农业产业技术体系建设专项（CARS-34）；山西省重点研发计划重点项目（201703D211002-9-2）；山西省农业科学院雁门关农牧交错带专项（YCX2017D2107，YCX2018102）共同资助

Abstract

Abstract: In order to further analyze the function of MsLEA4-4 in stress resistance,different level of salt stress was applied on Arabidopsis thaliana transgenic lines to verify its salt tolerance function. MsLEA4-4 overexpression transgenic lines were used in this study. The results showed that under salt stress the germination rate of transgenic lines was reached to 55%,which was 81% higher than that of control plant (CK). The fresh weight and chlorophyll content of transgenic lines were higher than CK (P<0.05). The survival rate of transgenic lines were increased by 75.0%~81.3% compared to CK. Salt stress significantly inhibited root growth,but the number of lateral roots of transgenic plants was 4~5 more than that of CK (P<0.05);the content of soluble sugar (P<0.05),SOD (P<0.01),CAT (P<0.01) and POD (P<0.05) activity in transgenic lines was higher than that of CK under salt stress. However,the content of proline (P<0.01) and malondialdehyde (P<0.05) was lower than that of CK. We speculated that MsLEA4-4 was involved in the regulation of salt stress in Arabidopsis thaliana,which improved the tolerance of transgenic lines to salt stress. The study provides a basis for further exploring the function of MsLEA4-4 in transgenic alfalfa under salt stress,and provides a basis for the cultivation of salt-tolerant alfalfa.

Key words: Medicago sativa, Late embryogenesis abundant proteins, Salt stresses, Arabidopsis thaliana

摘要： 为了深入研究紫花苜蓿（Medicago sativa）MsLEA4-4基因的抗逆性，本试验对前期获得的转MsLEA4-4基因的拟南芥（Arabidopsis thaliana）株系进行不同浓度盐胁迫处理，以验证MsLEA4-4基因在拟南芥植株体内的耐盐性。试验结果表明：盐胁迫后转基因株系的发芽率达到55%，比对照植株（Control plant，CK）高81%；转基因株系的鲜重、叶绿素含量均高于CK（P<0.05）；盐胁迫后转基因株系的存活率比CK提高75.0%~81.3%；盐胁迫明显抑制根系生长，但转基因植株的侧根数量比CK多4~5根（P<0.05）；盐胁迫后转基因株系体内的可溶性糖含量（P<0.05）和超氧化物歧化酶（P<0.01），过氧化氢酶（P<0.01），过氧化物酶（P<0.05）活性均高于CK，脯氨酸（P<0.01）和丙二醛（P<0.05）含量均低于CK。综上可得，MsLEA4-4基因参与了拟南芥体内的耐盐性调控，提高了转基因拟南芥对盐胁迫的耐受性。本研究为进一步探索MsLEA4-4在转基因紫花苜蓿盐胁迫中的功能及培育耐盐性紫花苜蓿品种提供依据。

关键词: 紫花苜蓿, 盐胁迫, 胚胎晚期富集蛋白, 拟南芥

CLC Number:

S551+7
Q78

JIA Hui-li, WANG Xue-min, GAO Tao, SHI Yong-hong, WANG Yun-qi, WU Xin-ming, LIU Jian-ning, FANG Zhi-hong, DONG Kuan-hu. Characterization of the Salt Tolerance of Transgenic Arabidopsis Thaliana Overexpression of MsLEA4-4 from Medicago Sativa[J]. Acta Agrestia Sinica, 2020, 28(3): 597-605.

贾会丽, 王学敏, 高涛, 石永红, 王运琦, 吴欣明, 刘建宁, 方志红, 董宽虎. 转MsLEA4-4基因拟南芥株系的耐盐性分析[J]. 草地学报, 2020, 28(3): 597-605.

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Characterization of the Salt Tolerance of Transgenic Arabidopsis Thaliana Overexpression of MsLEA4-4 from Medicago Sativa

转MsLEA4-4基因拟南芥株系的耐盐性分析

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