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Dry mycelium of Penicillium chrysogenum activates defense responses and restricts the spread of Tobacco Mosaic Virus in tobacco

文献类型： 外文期刊

作者： Zhong, Yu 1 ; Peng, Jie-jun 2 ; Chen, Zhuang-zhuang 1 ; Xie, Hong 1 ; Luo, Dan 1 ; Dai, Jin-ran 1 ; Yan, Fei 2 ; Wang, Ji 1 ;

作者机构： 1.Yunnan Univ, Coll Life Sci, Inst Plant Sci, Kunming 650091, Yunnan, Peoples R China

2.Acad Agr Sci, Inst Virol & Biotechnol, State Key Lab Breeding Base Zhejiang Sustainable, Hangzhou 310021, Zhejiang, Peoples R China

3.Shandong Acad Agr Sci, Cotton Res Ctr, Jinan 250100, Shandong, Peoples R China

4.Kunming Stn Forestry Sci & Technol Promot, Kunming 650223, Yunnan, Peoples R China

关键词： Penicillium chrysogenum;Tobacco;BY-2 cell;Induced resistance;Tobacco Mosaic Virus

期刊名称：PHYSIOLOGICAL AND MOLECULAR PLANT PATHOLOGY （ 影响因子：2.747； 五年影响因子：2.388 ）

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收录情况： SCI

摘要： Microbes and microbial metabolites/molecules-induced resistance is known to protect plants from several invaders, including viruses. We studied a water extract of dry mycelium of Penicillium chrysogenum (DMP)-induced defense responses and determined whether this extract protects tobacco from Tobacco Mosaic Virus (TMV). Transcripts of four genes - PAL, 4CL, C4H and LPO that are involved in the synthesis of secondary metabolites and the contents of phenolic compounds, scopoletin and lignin, were rapidly induced in DMP-treated BY-2 cell suspensions that were derived from Nicotiana tabacum L. cv. Bright Yellow-2, indicating a DMP-induced resistance in BY-2 cells. Transcripts of the salicylic acid (SA)dependent gene PR-1a were rapidly induced after DMP treatment, indicating the activation of SA-dependent signaling pathway. The expression of the jasmonic acid (JA)-responsive gene PDF1.2 suggests that DMP might induce distinct signaling pathways simultaneously. A 30B vector carrying the green fluorescent protein gene (30B: GFP) was used to monitor the replication of the virus vector in BY-2 cells and tobacco plants. The spread of the virus vector was impaired both in DMP-pretreated BY-2 cells and tobacco plants, indicating that DMP helped protect tobacco against TMV. Our data suggest that the DMP activates defense responses in tobacco BY-2 cell suspensions, including the accumulation of secondary metabolites and the expression of defense responses genes, and protects tobacco from TMV. (C) 2015 Elsevier Ltd. All rights reserved.

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