Record ID No. |
4779 |
Author(s) |
ZhongQun He, Zhi Huang , 2013 |
Affiliation |
College of Horticulture, Sichuan Agricultural University, Yáan, Sichuan, 625014, P. R. China, Email: hzqun328@163.com |
Title |
Expression analysis of LeNHX1 gene in mycorrhizal tomato under salt stress |
Source. Vol.(no):Page |
Journal of Microbiology 51(1): 100-104p. |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Soil plant relations |
Sub-subjects |
Difficult sites |
Host |
Solanum lycopersicum |
Organism |
Arbuscular Mycorrhiza (AM) |
Country |
China, East Asia |
Abstracts |
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 Cl− accumulated. 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. |