Quantification of symbiotic contributions to lower termite lignocellulose digestion using antimicrobial treatments

Insect Biochemistry and Molecular Biology
Brittany F PetersonM E Scharf

Abstract

Animal-microbe co-evolution and symbiosis are broadly distributed across the animal kingdom. Insects form a myriad of associations with microbes ranging from vectoring of pathogens to intracellular, mutualistic relationships. Lower termites are key models for insect-microbe symbiosis because of the diversity, complexity and functionality of their unique tripartite symbiosis. This collaboration allows termites to live on a diet of nitrogen-poor lignocellulose. Recent functional investigations of lignocellulose digestion in lower termites have primarily focused on the contributions of the eukaryotic members of the termite holobiont (termite and protist). Here, using multiple antimicrobial treatments, we induced differing degrees of dysbiosis in the termite gut, leading to variably altered symbiont abundance and diversity, and lignocellulolytic capacity. Although protists are clearly affected by antimicrobial treatments, our findings provide novel evidence that the removal of distinct groups of bacteria partially reduces, but does not abolish, the saccharolytic potential of the termite gut holobiont. This is specifically manifested by reductions of 23-47% and 30-52% in glucose and xylose yields respectively from complex lignocellu...Continue Reading

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Citations

Apr 20, 2016·Frontiers in Microbiology·Brittany F Peterson, Michael E Scharf
Jan 9, 2021·Annual Review of Entomology·Michael E Scharf, Brittany F Peterson
Oct 27, 2020·Frontiers in Microbiology·Alison G Blanton, Brittany F Peterson

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