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从花椒根际中分离到的具有生物表面活性的多形类诺卡氏菌 RHPR9 促进辣椒生长。

Biosurfactant producing multifarious Streptomyces puniceus RHPR9 of Coscinium fenestratum rhizosphere promotes plant growth in chilli.

机构信息

Department of Microbiology, University College of Science, Osmania University Hyderabad, Hyderabad, India.

Department of Wildlife and Management, Kuvempu University Shankaraghatta, Karnataka, India.

出版信息

PLoS One. 2022 Mar 15;17(3):e0264975. doi: 10.1371/journal.pone.0264975. eCollection 2022.

DOI:10.1371/journal.pone.0264975
PMID:35290374
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8923452/
Abstract

The present study involves isolation of Streptomyces spp. from rhizosphere of Coscinium fenestratum Gaertn, an endangered medicinal plant from Western Ghats of Karnataka, India. Four potential isolates were identified by 16S rRNA sequencing as Streptomyces sp. RHPR3, Streptomyces puniceus RHPR9, Streptomyces sp. RHPR14 and Streptomyces mediolani RHPR25. An enrichment culture method was used for the isolation of Streptomyces spp. for biosurfactant activity. Among four potential Streptomyces spp., S. puniceus RHPR9 showed highest Emulsification index (EI) (78±0.2%) and Emulsification assay (EA) (223±0.2 EU mL-1). Thin layer chromatography, Fourier transform infrared spectroscopy (FTIR) and mass spectrometric analysis revealed that as glycolipid. Further confirmed by presence of fatty acids like hexanoic acid methyl ester, decanoic acid by Gas chromatography mass spectroscopy (GC-MS) analysis. S. puniceus RHPR9 showed a significant IAA production (41μg mL-1), solubilized P (749.1 μg mL-1), growth promotion of chilli (Capsicum annuum L.) was evaluated using paper towel method and greenhouse conditions. S. puniceus RHPR9 showed a significant increase in seed vigor index (2047) and increase in plant biomass (65%) when compared to uninoculated control. To our knowledge, this is the first report on epiphytic S. puniceus RHPR9 isolated from an endangered medicinal plant C. fenestratum Gaertn, for biosurfactant production and plant growth promotion activities.

摘要

本研究从印度卡纳塔克邦西高止山脉濒危药用植物海风藤（Coscinium fenestratum Gaertn）的根际中分离出链霉菌属（Streptomyces spp.）。通过 16S rRNA 测序，将四个潜在的分离株鉴定为链霉菌属 RHPR3、深紫链霉菌 RHPR9、链霉菌属 RHPR14 和中北链霉菌 RHPR25。采用富集培养法从根际土壤中分离出具有生物表面活性剂活性的链霉菌属。在四个潜在的链霉菌属中，深紫链霉菌 RHPR9 表现出最高的乳化指数（EI）（78±0.2%）和乳化活性（EA）（223±0.2 EU mL-1）。薄层层析、傅里叶变换红外光谱（FTIR）和质谱分析表明其为糖脂。通过气相色谱质谱分析（GC-MS）进一步证实存在己酸甲酯、癸酸等脂肪酸。深紫链霉菌 RHPR9 表现出显著的 IAA 产量（41μg mL-1）、可溶磷（749.1μg mL-1）。采用纸巾法和温室条件对其促进辣椒（Capsicum annuum L.）生长的能力进行了评价。与未接种对照相比，深紫链霉菌 RHPR9 显著提高了种子活力指数（2047）和植物生物量（65%）。据我们所知，这是首次报道从濒危药用植物海风藤（Coscinium fenestratum Gaertn）中分离出的具有生物表面活性剂生产和促进植物生长活性的附生深紫链霉菌 RHPR9。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/62d2/8923452/acda7fdb4435/pone.0264975.g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/62d2/8923452/3cd8c644c79b/pone.0264975.g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/62d2/8923452/19b8c466c3c7/pone.0264975.g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/62d2/8923452/9d863f7878e4/pone.0264975.g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/62d2/8923452/24c037f79abb/pone.0264975.g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/62d2/8923452/acda7fdb4435/pone.0264975.g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/62d2/8923452/3cd8c644c79b/pone.0264975.g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/62d2/8923452/19b8c466c3c7/pone.0264975.g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/62d2/8923452/9d863f7878e4/pone.0264975.g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/62d2/8923452/24c037f79abb/pone.0264975.g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/62d2/8923452/acda7fdb4435/pone.0264975.g005.jpg

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