The microbiota of Idaea inquinata developing on dry herbs

Author:

Magoga Giulia12ORCID,Piombo Chiara3,Locatelli Daria Patrizia3,Limonta Lidia3,Montagna Matteo24ORCID

Affiliation:

1. Department of Agricultural and Environmental Sciences Università degli Studi di Milano via Celoria 2, 20133 Milano Italy

2. Department of Agricultural Sciences University of Naples Federico II Via Università 100, 80055 Portici Italy

3. Department of Food, Environmental and Nutritional Sciences Università degli Studi di Milano Milano Italy

4. Interuniversity Center for Studies on Bioinspired Agro‐Environmental Technology (BAT Center) University of Naples Federico II Via Università 100, 80055 Portici Italy

Abstract

AbstractIdaea inquinata (Scopoli) (Lepidoptera: Geometridae, Idaeini) is a potential pest of stored food, mainly dry herbs. In this study, the role of diet in the shaping of the I. inquinata‐associated bacterial community was investigated and its impact on insect performance (i.e., proportion of adult emergence and duration of postembryonic development). Larvae were reared on three diets with different nutritional compositions: (1) Matricaria chamomilla L. flowers, (2) Angelica archangelica L. roots, and (3) artificial diet. A DNA metabarcoding approach targeting V1‐V2 and V4 regions of the bacterial 16S rRNA was adopted to characterize the bacterial communities associated with adults and larvae reared on different diets, and estimate their composition and diversity. The core microbiota of this species was found to include some bacterial genera commonly associated with Lepidoptera. When a coverage‐based integration of rarefaction and extrapolation of Hill numbers was used to compare groups of samples, the microbial diversity (estimated as phylogenetic diversity) differed among individuals reared on different diets, and also between larvae vs. adults. The lowest taxon diversity was found associated with individuals reared on M. chamomilla. Larvae fed with this fiber‐rich diet had also a significantly slower development. The composition of the microbial community varied among individuals with different diets, but not between adults vs. larvae. This study highlights the important role of diet in shaping I. inquinata microbiota, but also suggests that the microbiota of non‐feeding adult moths could be partially inherited from larvae.

Publisher

Wiley

Subject

Insect Science,Ecology, Evolution, Behavior and Systematics

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