芽孢杆菌DY-3提高烟草幼苗的耐盐性

江绪文, 陈嘉斌, 李贺勤*, 赵洪海, 张玉梅
青岛农业大学农学与植物保护学院/山东省旱作农业技术重点实验室, 山东青岛266109

通信作者:李贺勤;E-mail: hqliaau@163.com

摘 要:

本文研究了芽孢杆菌DY-3对盐胁迫下烟草幼苗生长和生理生化特性的影响。结果表明: 菌株可显著提高烟草幼苗的苗长、根长、鲜重和干重, 显著提高烟草叶片中叶绿素含量、相对水分含量、脯氨酸含量和酚类物质含量, 显著降低叶片中丙二醛含量、细胞膜透性、Na+和Clˉ含量。这说明菌株DY-3可提高烟草幼苗的耐盐性。

关键词:芽孢杆菌DY-3; 盐胁迫; 烟草; 幼苗

收稿:2016-01-08   修定:2016-06-02

资助:青岛农业大学高层次人才引进项目(1113346)、青岛农业大学应用型人才培养特色名校建设工程教学研究项目(XJG2013147)、青岛农业大学大学生科技创新项目(2014-179)和山东省旱地作物水分高效利用创新团队项目(62112N5)。

Bacillus aquimaris strain DY-3 improves salt-tolerance of tobacco seedlings

JIANG Xu-Wen, CHEN Jia-Bin, LI He-Qin*, ZHAO Hong-Hai, ZHANG Yu-Mei
Shandong Provincial Key Laboratory of Dryland Technology/College of Agronomy and Plant Protection, Qingdao Agricultural University, Qingdao, Shandong 266109, China

Corresponding author: LI He-Qin; E-mail: hqliaau@163.com

Abstract:

Effects of Bacillus aquimaris strain DY-3 on the growth and physiobiochemical characteristics of tobacco seedling under salt stress were studied by a pot experiment. The results showed that compared with salt stress, shoot length, root length, fresh and dry weights were significantly promoted, chlorophyll content, leaf relative water content, proline content and total phenolic compound content were also significantly enhanced by inoculation with Bacillus aquimaris strain DY-3, while lipid peroxidation levels, cell membrane permeability and sodium ion and chloride ion contents were significantly decreased. The above results indicate that inoculation with Bacillus aquimaris strain DY-3 can enhance the salt tolerance of tobacco seedlings.

Key words: Bacillus aquimaris strain DY-3; salt stress; tobacco; seedlings

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