Paromomycin Derived from Streptomyces sp AG-P 1441 Induces Resistance against Two Major Pathogens of Chili Pepper

文献类型： 外文期刊

第一作者： Sang, Mee Kyung

作者： Sang, Mee Kyung;Park, Kyungseok;Kim, Chang-Jin;Park, Dong-Jin;Nam, Ki-Woong;Zhang, Kecheng

作者机构：

关键词： Chili pepper;induced resistance;paromomycin;Phytophthora blight;soft rot;Streptomyces sp.

期刊名称：JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY （ 影响因子：2.351； 五年影响因子：2.65 ）

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收录情况： SCI

摘要： This is the first report that paromomycin, an antibiotic derived from Streptomyces sp. AG-P 1441 (AG-P 1441), controlled Phytophthora blight and soft rot diseases caused by Phytophthora capsici and Pectobacterium carotovorum, respectively, in chili pepper (Capsicum annum L.). Chili pepper plants treated with paromomycin by foliar spray or soil drenching 7 days prior to inoculation with P. capsici zoospores showed significant (p < 0.05) reduction in disease severity (%) when compared with untreated control plants. The disease severity of Phytophthora blight was recorded as 8% and 50% for foliar spray and soil drench, respectively, at 1.0 ppm of paromomycin, compared with untreated control, where disease severity was 83% and 100% by foliar spray and soil drench, respectively. A greater reduction of soft rot lesion areas per leaf disk was observed in treated plants using paromomycin (1.0 mu g/ml) by infiltration or soil drench in comparison with untreated control plants. Paromomycin treatment did not negatively affect the growth of chili pepper. Furthermore, the treatment slightly promoted growth; this growth was supported by increased chlorophyll content in paromomycin-treated chili pepper plants. Additionally, paromomycin likely induced resistance as confirmed by the expression of pathogenesis-related (PR) genes: PR-1, beta-1,3-glucanase, chitinase, PR-4, peroxidase, and PR-10, which enhanced plant defense against P. capsici in chili pepper. This finding indicates that AG-P 1441 plays a role in pathogen resistance upon the activation of defense genes, by secretion of the plant resistance elicitor, paromomycin.

分类号： Q93

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