首页 | 本学科首页   官方微博 | 高级检索  
   检索      


Overexpression of the Malus hupehensis MhNPR1 gene increased tolerance to salt and osmotic stress in transgenic tobacco
Authors:Ji-Yu Zhang  Shen-Chun Qu  Yu-Shan Qiao  Zhen Zhang  Zhong-Ren Guo
Institution:1. Institute of Botany, Jiangsu Province and the Chinese Academy of Sciences, Nanjing, 210014, China
2. College of Horticulture, Nanjing Agricultural University, Weigang 1, Nanjing, 210095, China
Abstract:Earlier, we have reported that overexpression of Malus hupehensis Non-expressor of pathogenesis related gene 1 (MhNPR1) gene in tobacco could induce the expression of pathogenesis-related genes and enhance resistance to fungus Botrytis cinerea. In this study, we showed that MhNPR1 can be induced by NaCl, PEG6000, low temperature (4 °C), abscisic acid and apple aphids’ treatments in M. hupehensis. Heterogonous expression of MhNPR1 gene in tobacco conferred enhanced resistance to NaCl at the stage of seed germination, and conferred resistance to mannitol at the stage of seed germination and to PEG6000 at the stage of seedlings. Furthermore, overexpression of MhNPR1 in transgenic tobacco led to higher expression levels of osmotic-stress related genes compared with wild-type plants. This was the first report of a novel function of NPR1 that overexpression of MhNPR1 gene has a positive effect on salt and osmotic stress in tobacco, which differs from the function that overexpressing of AtNPR1 gene has a negative effect on dehydration and salt stress in rice.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号