枯草芽孢杆菌GB03对紫花苜蓿耐盐性的影响

韩庆庆, 贾婷婷, 吕昕培, 李惠茹, 李静, 赵祺, 王锁民, 张金林*
兰州大学草地农业生态系统国家重点实验室, 草地农业科技学院, 兰州730020

通信作者:张金林;E-mail: jlzhang@lzu.edu.cn;Tel: 0931-8913447

摘 要:

本文研究了根际有益细菌枯草芽孢杆菌GB03对草类植物紫花苜蓿种子萌发、生长和耐盐性的调控作用。结果表明, 枯草芽孢杆菌GB03菌液浸泡紫花苜蓿种子处理后, 显著提高了不同盐浓度处理下种子的发芽势与发芽率; 对株高、根长和生物量均有不同程度的提升作用, 显著增加了不同盐浓度处理下叶绿素含量。

关键词:紫花苜蓿; 枯草芽孢杆菌; 盐胁迫; 种子萌发; 促生作用

收稿:2014-05-04   修定:2014-08-01

资助:国家自然科学基金项目(31222053和31172256)、教育部“新世纪优秀人才支持计划” (NCET-11-0217)和中央高校基本科研业务费项目(lzujbky-2013-k08)。

Effect of Bacillus subtilis GB03 on Salt Tolerance of Alfalfa (Medicago sativa)

HAN Qing-Qing, JIA Ting-Ting, LÜ Xin-Pei, LI Hui-Ru, LI Jing, ZHAO Qi, WANG Suo-Min, ZHANG Jin-Lin*
State Key Laboratory of Grassland Agro-Ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China

Corresponding author: ZHANG Jin-Lin; E-mail: jlzhang@lzu.edu.cn; Tel: 0931-8913447

Abstract:

In current study, the regulation of Bacillus subtilis GB03 to seed germination, growth and salt tolerance of Medicago sativa was investigated. The results indicated that B. subtilis GB03 significantly increased seed germination potential and germination rates of M. sativa under various salinity conditions. GB03 improved shoot height, root length and plant biomass in different degrees, and significantly enhanced chlorophyll content under different concertrations of salt.

Key words: alfalfa (Medicago sativa); Bacillus subtilis; salt stress; seed germination; growth promotion

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