Abstract:
:Gut bacteria influence the development of different pathologies caused by bacteria, fungi and parasitoids in insects. Wax moth larvae became more susceptible to fungal infections after envenomation by the ectoparasitoid Habrobracon hebetor. In addition, spontaneous bacterioses occurred more often in envenomated larvae. We analyzed alterations in the midgut microbiota and immunity of the wax moth in response to H. hebetor envenomation and topical fungal infection (Beauveria bassiana) alone or in combination using 16S rRNA sequencing, an analysis of cultivable bacteria and a qPCR analysis of immunity- and stress-related genes. Envenomation led to a predominance shift from enterococci to enterobacteria, an increase in CFUs and the upregulation of AMPs in wax moth midguts. Furthermore, mycosis nonsignificantly increased the abundance of enterobacteria and the expression of AMPs in the midgut. Combined treatment led to a significant increase in the abundance of Serratia and a greater upregulation of gloverin. The oral administration of predominant bacteria (Enterococcus faecalis, Enterobacter sp. and Serratia marcescens) to wax moth larvae synergistically increased fungal susceptibility. Thus, the activation of midgut immunity might prevent the bacterial decomposition of envenomated larvae, thus permitting the development of fungal infections. Moreover, changes in the midgut bacterial community may promote fungal killing.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Polenogova OV,Kabilov MR,Tyurin MV,Rotskaya UN,Krivopalov AV,Morozova VV,Mozhaitseva K,Kryukova NA,Alikina T,Kryukov VY,Glupov VVdoi
10.1038/s41598-019-40301-6subject
Has Abstractpub_date
2019-03-08 00:00:00pages
4012issue
1issn
2045-2322pii
10.1038/s41598-019-40301-6journal_volume
9pub_type
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