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The Scientific World Journal
Volume 2014, Article ID 483526, 7 pages
http://dx.doi.org/10.1155/2014/483526
Research Article

Overexpression of a Vesicle Trafficking Gene, OsRab7, Enhances Salt Tolerance in Rice

1Key Laboratory of Molecular Biology and Gene Engineering of Jiangxi Province, College of life science, Nanchang University, Nanchang 330031, China
2Jiangxi Super-rice Research and Development Center, Nanchang 330200, China

Received 3 November 2013; Accepted 24 December 2013; Published 12 February 2014

Academic Editors: L. R. Ceci and V. Niknam

Copyright © 2014 Xiaojue Peng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

High soils salinity is a main factor affecting agricultural production. Studying the function of salt-tolerance-related genes is essential to enhance crop tolerance to stress. Rab7 is a small GTP-binding protein that is distributed widely among eukaryotes. Endocytic trafficking mediated by Rab7 plays an important role in animal and yeast cells, but the current understanding of Rab7 in plants is still very limited. Herein, we isolated a vesicle trafficking gene, OsRab7, from rice. Transgenic rice over-expressing OsRab7 exhibited enhanced seedling growth and increased proline content under salt-treated conditions. Moreover, an increased number of vesicles was observed in the root tip of OsRab7 transgenic rice. The OsRab7 over-expression plants showed enhanced tolerance to salt stress, suggesting that vacuolar trafficking is important for salt tolerance in plants.