中文摘要：阿氏肠杆菌BQ9是一种促进植物生长的根际细菌，在温室条件下可促进番茄生长并诱导番茄对番茄黄化曲叶病毒（TYLCV）的抗性。接种30天后，与模拟处理的番茄植株相比，用BQ9预先处理的番茄植株鲜质量增加，疾病严重度明显降低，生防效率可达52%。BQ9预处理过的植株可快速诱导抗性基因PR1a和PR1b的表达以及H2O2的迸发。本研究结果表明，促进植物生长的根际细菌BQ9可通过增加防御反应基因的表达来诱导植物对TYLCV的防御反应，且诱导的抗性可与抗氧化物酶的表达及H2O2的生成机械连接。
外文摘要：Enterobacter asburiae BQ9, a plant-growth-promoting rhizobacterium, was shown to promote tomato plant growth and induce resistance to Tomato yellow leaf curl virus (TYLCV) under greenhouse conditions. Compared with mock-treated tomato plants, plants that were pretreated with BQ9 had increased fresh mass and significantly reduced disease severity and 52% biocontrol efficacy was achieved 30 days after inoculation. The expression of defense-related genes PR1a and PR1b and the H2O2 burst were quickly induced in BQ9 pretreated plants. Antioxidase activity analysis showed that the activities of phenylalanine ammonia lyase, peroxidase, catalase, and superoxide dismutase increased significantly in BQ9 pretreated plants. Our results suggest that the plant-growth-promoting rhizobacterium BQ9 induced a priming of the plant defense responses to TYLCV by increasing the expression of defense response genes, and the induced resistance was mechanistically connected to the expression of antioxidant enzymes and the production of H2O2.
外文关键词：Enterobacter asburiae；growth promotion；induced resistance；Tomato yellow leaf curl virus；H2O2 burst
作者：Li, Hongwei；Ding, Xueling；Wang, Chao；等
作者单位：南京农业大学
期刊名称：TURKISH JOURNAL OF BIOLOGY
期刊影响因子：1.183
出版年份：2016
出版刊次：1
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