NDLI: Phospholipase A$_{2}$ inhibitors in bacterial culture broth enhance pathogenicity of a fungus Nomuraea rileyi

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Phospholipase A$_{2}$ inhibitors in bacterial culture broth enhance pathogenicity of a fungus Nomuraea rileyi

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Phospholipase A$_{2}$ inhibitors in bacterial culture broth enhance pathogenicity of a fungus Nomuraea rileyi

Content Provider	Springer Nature Link
Author	Park, Jung A Kim, Yonggyun
Copyright Year	2012
Abstract	An entomopathogenic fungus, Nomuraea rileyi, was isolated and its identity was confirmed by its internal transcribed spacer DNA sequence. The isolated N. rileyi exhibited a specific pathogenicity to lepidopteran species. This study was focused on enhancing the fungal pathogenicity by using immunosuppressive agents. In response to infection of N. rileyi, Spodoptera exigua larvae significantly induced catalytic activity of phospholipase A$_{2}$ (PLA$_{2}$) in three immune-associated tissues, namely hemocytes, fat body, and hemolymph plasma. Furthermore, the infected S. exigua larvae induced transcription of several antimicrobial peptide (AMP) genes. Two entomopathogenic bacteria, Xenorhabdus nematophila (Xn) and Photorhabdus temperata subsp. temperata (Ptt), possessed specific PLA$_{2}$-inhibitory activities and their culture broths significantly inhibited the enzyme activities in hemocytes, fat body, and plasma of S. exigua. In addition, the bacterial metabolites inhibited transcription of AMP genes in S. exigua that would normally respond to the immune challenge by N. rileyi. The immunosuppressive effect of Xn or Ptt bacterial broth resulted in significant enhancement of the fungal pathogenicity against late instar larvae of S. exigua and Plutella xylostella. The effect of such a mixture was confirmed by field assay against two lepidopteran species. These results suggest that the bacterial and fungal mixture can be applied to develop a novel biopesticide to control lepidopteran species.
Starting Page	644
Ending Page	651
Page Count	8
File Format	PDF
ISSN	12258873
Journal	Journal of Microbiology
Volume Number	50
Issue Number	4
e-ISSN	19763794
Language	English
Publisher	The Microbiological Society of Korea
Publisher Date	2012-07-21
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nomuraea rileyi Xenorhabdus nematophila Photorhabdus temperata temperata Spodoptera exigua immune eicosanoids Microbiology
Content Type	Text
Resource Type	Article
Subject	Medicine Microbiology Applied Microbiology and Biotechnology

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Phospholipase A2 inhibitors in bacterial culture broth enhance pathogenicity of a fungus Nomuraea rileyi.

Phospholipase A2 Inhibitors Synthesized by Two Entomopathogenic Bacteria, Xenorhabdus nematophila and Photorhabdus temperata subsp. temperata

Patogenitas Cendawan Entomopatogen Nomuraea Rileyi (Farl.) Sams. Terhadap Hama Spodoptera Exigua Hübner (Lepidoptera: Noctuidae)

Isolation of ergosterol peroxide from Nomuraea rileyi infected larvae of tobacco cutworm

Eicosanoids rescue Spodoptera exigua infected with Xenorhabdus nematophilus, the symbiotic bacteria to the entomopathogenic nematode Steinernema carpocapsae.

Biochemical characteristics of immune-associated phospholipase A$_{2}$ and its inhibition by an entomopathogenic bacterium, Xenorhabdus nematophila

Pathogenicity of native entomopathogenic fungus Nomuraea rileyi against Spodoptera litura.

Stability of entomopathogenic bacteria, Xenorhabdus nematophila and Photorhabdus luminescens, during in vitro culture

Sequential immunosuppressive activities of bacterial secondary metabolites from the entomopahogenic bacterium Xenorhabdus nematophila.

Phospholipase A$_{2}$ inhibitors in bacterial culture broth enhance pathogenicity of a fungus Nomuraea rileyi

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Phospholipase A2 inhibitors in bacterial culture broth enhance pathogenicity of a fungus Nomuraea rileyi.

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Phospholipase A$_{2}$ inhibitors in bacterial culture broth enhance pathogenicity of a fungus Nomuraea rileyi