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HOME > J. Microbiol > Volume 51(1); 2013 > Article
Research Support, Non-U.S. Gov't
Expression Analysis of LeNHX1 Gene in Mycorrhizal Tomato under Salt Stress
ZhongQun He , Zhi Huang
Journal of Microbiology 2013;51(1):100-104.
DOI: https://doi.org/10.1007/s12275-013-2423-3
Published online: March 2, 2013
College of Horticulture, Sichuan Agricultural University, Yáan, Sichuan, 625014, P. R. ChinaCollege of Horticulture, Sichuan Agricultural University, Yáan, Sichuan, 625014, P. R. China
Corresponding author:  ZhongQun He , Tel: +86-835-2882127, 
Zhi Huang , Tel: +86-835-2882127, 
Received: 13 August 2012   • Accepted: 1 November 2012
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Abstract

The plant growth, stem sap flow, Na+ and Cl- content, and the expression of vacuolar Na+/H+ antiporter gene (LeNHX1) in the leaves and roots of tomato under different NaCl stresses (0.5% and 1%) were studied to analyze the effect of arbuscular mycorrhizal fungi (AMF) on Na+ and Cl- accumulation and ion exchange. The results showed that arbuscular mycorrhizal (AM) plant growth and stem sap flow increased and salt tolerance improved, whereas Na+ and Claccumulated. Na+ significantly decreased, and no significant decline was detected in Cl- content after AMF inoculation compared with the non-AM plants. The LeNHX1 gene expression was induced in the AM and non-AM plants by NaCl stress. However, AMF did not improve the LeNHX1 level, and low expression was observed in the AM tomato. Hence, the mechanism that reduced the Na+ damage to tomato induced by AMF has little relation to LeNHX1, which can export Na+ from the cytosol to the vacuole across the tonoplast.

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    Expression Analysis of LeNHX1 Gene in Mycorrhizal Tomato under Salt Stress
    J. Microbiol. 2013;51(1):100-104.   Published online March 2, 2013
    DOI: https://doi.org/10.1007/s12275-013-2423-3
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