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Bacillus amyloliquefaciens alters the diversity of volatile and non-volatile metabolites and induces the expression of defence genes for the management of Botrytis leaf blight of Lilium under protected conditions
Journal of Plant Pathology ( IF 2.2 ) Pub Date : 2020-07-02 , DOI: 10.1007/s42161-020-00602-6
S. Nakkeeran , R. Priyanka , S. Rajamanickam , U. Sivakumar

Lilium leaf blight induced by Botrytis cinerea is a major threat in the cultivation of Lilium in the Nilgiris province of Tamil Nadu, India under protected conditions. The present study aims to understand bipartite and tripartite interactions between B. cinerea, Lilium and B. amyloliquefaciens to develop a cost-effective antagonist to manage Botrytis leaf blight. The in vitro antagonism by B. amyloliquefaciens (VB7) suppressed the mycelial growth of B. cinerea by up to 46%. Foliar application of B. amyloliquefaciens (VB7) colonized the phylloplane within 48 h and prevented conidial germination of B. cinerea. Biofilm on the leaf surface colonized the conidia of B. cinerea (SEL). The colonized conidia were parasitized by bacterial cells, resulting in shrinkage. The bipartite interaction between B. amyloliquefaciens (VB7) and mycelial biomass of B. cinerea as sole carbon source produced volatile and non-volatile antifungal compounds. Tripartite interactions between Lilium leaf, B. amyloliquefaciens (VB7) and conidia of B. cinerea produced five different non-volatile antifungal and antibacterial compounds. Expression of defence genes through qRT-PCR analysis indicated that the transcript level of PAL, PR 10 and ascorbate peroxidase (APX) were triggered in Lilium plants treated with B. amyloliquefaciens (VB7), challenged against B. cinerea (SEL). Bulb dipping and soil drenching along with foliar application suppressed Botrytis leaf blight and increased Lilium stem yield under protected conditions.

中文翻译:

解淀粉芽孢杆菌改变挥发性和非挥发性代谢物的多样性,并诱导防御基因的表达,以在保护条件下管理百合灰霉病

Botrytis cinerea 引起的百合叶枯病是印度泰米尔纳德邦 Nilgiris 省在保护条件下种植百合的主要威胁。本研究旨在了解 B. cinerea、Lilium 和 B. amyloliquefaciens 之间的二方和三方相互作用,以开发一种具有成本效益的拮抗剂来控制灰霉病叶枯病。B. amyloliquefaciens (VB7) 的体外拮抗作用将 B. cinerea 的菌丝体生长抑制了 46%。B. amyloliquefaciens (VB7) 的叶面施用在 48 小时内定植叶面并阻止了 B. cinerea 的分生孢子萌发。叶表面上的生物膜定植于 B. cinerea (SEL) 的分生孢子。定植的分生孢子被细菌细胞寄生,导致萎缩。B. amyloliquefaciens (VB7) 和 B.菌丝体生物量之间的二分相互作用。灰霉病作为唯一的碳源产生挥发性和非挥发性抗真菌化合物。百合叶、解淀粉芽孢杆菌 (VB7) 和 B. cinerea 分生孢子之间的三方相互作用产生了五种不同的非挥发性抗真菌和抗菌化合物。通过 qRT-PCR 分析表达的防御基因表明,PAL、PR 10 和抗坏血酸过氧化物酶 (APX) 的转录水平在用解淀粉芽孢杆菌 (VB7) 处理的百合植物中被触发,以对抗灰葡萄孢 (SEL)。在保护条件下,球茎浸渍和土壤浸透以及叶面施用抑制了灰霉病叶枯病并增加了百合茎产量。cinerea 产生了五种不同的非挥发性抗真菌和抗菌化合物。通过 qRT-PCR 分析表达的防御基因表明,PAL、PR 10 和抗坏血酸过氧化物酶 (APX) 的转录水平在用解淀粉芽孢杆菌 (VB7) 处理的百合植物中被触发,以对抗灰葡萄孢 (SEL)。在保护条件下,球茎浸渍和土壤浸透以及叶面施用抑制了灰霉病叶枯病并增加了百合茎产量。cinerea 产生了五种不同的非挥发性抗真菌和抗菌化合物。通过 qRT-PCR 分析表达的防御基因表明,PAL、PR 10 和抗坏血酸过氧化物酶 (APX) 的转录水平在用解淀粉芽孢杆菌 (VB7) 处理的百合植物中被触发,以对抗灰葡萄孢 (SEL)。在保护条件下,球茎浸渍和土壤浸透以及叶面施用抑制了灰霉病叶枯病并增加了百合茎产量。
更新日期:2020-07-02
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