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Abstract <p>Microbiome plays an important role in the growth and development of plants via the execution of various beneficial functions. The features for environmental adaptation of plant system also demand the association with unique microbial communities. The present study aimed to identify the microorganisms from the <i>Nepenthes</i> pitcher to explore their application against the cosmopolitan fungi <i>Pythium aphanidermatum.</i> Here, in vitro screening of the bacteria obtained from the pitcher revealed the isolate NhPB49 to have remarkable antifungal activity along with many plant-beneficial traits. Identification of the promising organism by 16S rDNA gene sequence analysis showed its 99.13% identity with <i>Kocuria massiliensis</i>. The LC-MS/MS and GC-MS analysis have also revealed the potential of the selected isolate to produce various bioactive compounds, including kocumarin, a novel antibiotic compound, indole-3-acetic acid, and other active metabolites. As these compounds have already been known to have biocontrol and plant-beneficial properties, the characterized organism has immense agricultural promises to be explored. The in vivo disease-protective properties of the selected bacterium against the fruit rot of tomato further confirmed its application to manage <i>Pythium</i> infections.</p>

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Plant Beneficial Properties of Kocumarin and Novel Antibiotic-Producing Kocuria sp. Isolated from the Pitcher of Nepenthes sp.

  • 期刊论文

  • 发表日期：

    2025年9月17日

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  • R. Aswani,
  • D. Soumya,
  • K. S. Sebastian,
  • M. Jyothis,
  • E. K. Radhakrishnan

摘要

Abstract

Microbiome plays an important role in the growth and development of plants via the execution of various beneficial functions. The features for environmental adaptation of plant system also demand the association with unique microbial communities. The present study aimed to identify the microorganisms from the Nepenthes pitcher to explore their application against the cosmopolitan fungi Pythium aphanidermatum. Here, in vitro screening of the bacteria obtained from the pitcher revealed the isolate NhPB49 to have remarkable antifungal activity along with many plant-beneficial traits. Identification of the promising organism by 16S rDNA gene sequence analysis showed its 99.13% identity with Kocuria massiliensis. The LC-MS/MS and GC-MS analysis have also revealed the potential of the selected isolate to produce various bioactive compounds, including kocumarin, a novel antibiotic compound, indole-3-acetic acid, and other active metabolites. As these compounds have already been known to have biocontrol and plant-beneficial properties, the characterized organism has immense agricultural promises to be explored. The in vivo disease-protective properties of the selected bacterium against the fruit rot of tomato further confirmed its application to manage Pythium infections.