Overexpression of HaASR1 from a Desert Shrub, Haloxylon ammodendron, Improved Salt Tolerance of Arabidopsis thaliana

Author:

Lü Zhao-Long1234,Gao Hui-Juan1234,Xu Jia-Yi5,Chen Yuan1234,Lü Xin-Pei1234,Zhang Jin-Lin1234ORCID

Affiliation:

1. State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, Lanzhou 730000, China

2. Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Lanzhou 730000, China

3. Engineering Research Center of Grassland Industry, Ministry of Education, Lanzhou 730000, China

4. College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, China

5. College of Agriculture, Nanjing Agricultural University, Nanjing 210000, China

Abstract

Salt stress causes reduced plant growth and alters the plant development process, resulting in a threat to global crop production. The exploring of unique genes conferring to salt tolerance from plants that inhabit extreme environments remains urgent. Haloxylon ammodendron is a desert xero-halophyte shrub with a strong tolerance to drought and salt stresses. We previously reported that the drought tolerance of Arabidopsis thaliana was improved by the overexpression of HaASR1 from H. ammodendron. In this work, the effects of HaASR1 overexpression on the salt tolerance of Arabidopsis were investigated. HaASR1 overexpression significantly enhanced the growth of Arabidopsis lines under salinity and plant tissue water content through enhancing the osmotic adjustment ability, maintaining the membrane integrity, improving the chlorophyll content and leaf area, and thereby enhancing photosynthesis capacity. Taken together, the overexpression of HaASR1 from H. ammodendron improved the salt tolerance of the transgenic lines of Arabidopsis. These results indicated that HaASR1 from H. ammodendron has potential application values in increasing the salt tolerance of grass and crop plants by genetic engineering.

Funder

National Natural Science Foundation of China

Independent Research and Development Project of State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems

Publisher

MDPI AG

Subject

Agronomy and Crop Science

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