Molecular Mechanism of Plant Growth Promotion and Induced Systemic Resistance to Tobacco Mosaic Virus by Bacillus spp.

被引：106
|
作者：
Wang Shuai [1 ]
Wu, Huijun [1 ]
Qiao, Junqing [1 ]
Ma, Lingli [1 ]
Liu, Jun [1 ]
Xia, Yanfei [1 ]
Gao, Xuewen [1 ]
机构：
[1] Nanjing Agr Univ, Dept Plant Pathol, Key Lab Monitoring & Management Crop Dis & Pest I, Minist Agr,Coll Plant Protect, Nanjing 210095, Peoples R China
来源：
JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY | 2009年 / 19卷 / 10期
关键词：
Bacillus spp; PGPR; induced systemic resistance; tobacco mosaic virus; growth promotion; DISEASE RESISTANCE; DEFENSE RESPONSES; GENE; RHIZOBACTERIA; BIOCONTROL; PROTECTION; TOMATO; ACTIVATION; INDUCTION;
D O I：
10.4014/jmb.0901.008
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
Bacillus spp., as a type of plant growth-promoting rhizobacteria (PGPR), were studied with regards promoting plant growth and inducing plant systemic resistance. The results of greenhouse experiments with tobacco plants demonstrated that treatment with the Bacillus spp. significantly enhanced the plant height and fresh weight, while clearly lowering the disease severity rating of the tobacco mosaic virus (TMV) at 28 days post-inoculation (dpi). The TMV accumulation in the young non-inoculated leaves was remarkably lower for all the plants treated with the Bacillus spp. An RT-PCR analysis of the signaling regulatory genes Coil and NPR1, and defense genes PR-1a and PR-1b, in the tobacco treated with the Bacillus spp. revealed an association with enhancing the systemic resistance of tobacco to TMV. A further analysis of two expansin genes that regulate plant cell growth, NtEXP2 and NtEXP6, also verified a concomitant growth promotion in the roots and leaves of the tobacco responding to the Bacillus spp.
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收藏
页码：1250 / 1258
页数：9
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