Site‐specific profiles of biochemical properties in the larval digestive tract of Japanese rhinoceros beetle, Trypoxylus dichotomus (Coleoptera: Scarabaeidae)

The larvae of Japanese rhinoceros beetle, Trypoxylus dichotomus, feed on dead plant material in forest soils that are derived from fallen leaves broken down by basidiomycete fungi. Our previous work provided an understanding of the degradation of polysaccharides in dead plant material by T. dichotom...

Full description

Saved in:
Bibliographic Details
Published in:Entomological science 2020-03, Vol.23 (1), p.33-43
Main Authors: Wada, Noriko, Iwabuchi, Noriyuki, Sunairi, Michio, Nakajima, Mutsuyasu, Iwata, Ryûtarô, Anzai, Hirosi
Format: Article
Language:English
Subjects:
Acetic acid
Biochemistry
Biodegradation
Coleoptera
Degradation
Digestive system
Entomology
Forest soils
Fungi
Gastrointestinal tract
Ion concentration
Larvae
litter transformer
Metabolites
pH effects
polysaccharide digestion
Polysaccharides
Potassium
Profiles
Properties
Saccharides
Scarabaeidae
site‐specific environment
Soil
Trypoxylus dichotomus
Trypoxylus dichotomus larvae
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The larvae of Japanese rhinoceros beetle, Trypoxylus dichotomus, feed on dead plant material in forest soils that are derived from fallen leaves broken down by basidiomycete fungi. Our previous work provided an understanding of the degradation of polysaccharides in dead plant material by T. dichotomus larvae and reported the complexity of the physicochemical and biochemical environment of the larval gut. Here, we examined ten divisions of the digestive tract of T. dichotomus larvae for physicochemical and biochemical conditions to elucidate site‐specifically functional properties along the tract. The distribution of potassium ions, pH, and acetic acid differed markedly along the length of the digestive tract with the potassium ion concentration profile closely reflecting that of pH along the length of the digestive tract. Distinct physicochemical environments were maintained in the digestive tract along with site‐specific polysaccharide degradation. Based on these findings, we suggest that there are metabolic relationships between the activities of the enzymes involved in polysaccharide degradation, the presence of intermediate metabolites and location along the digestive tract. Furthermore, we revealed that the anterior region of the gut plays an important role in the degradation of polysaccharides in the digestive tract of T. dichotomus larvae. Analysis of various biochemical properties in ten dissected sections of the digestive tract of Trypoxylus dichotomus larvae revealed that the anterior region of the gut plays an important role in polysaccharide metabolism.
ISSN:1343-8786
1479-8298
DOI:10.1111/ens.12394