Molecular insights into the evolution of woody plant decay in the gut of termites

文献类型： 外文期刊

第一作者： Li, Hongjie

作者： Li, Hongjie;Kang, Xue;Zhao, Yufen;Yang, Mengyi;Kasseney, Boris Dodji;Zhou, Xuguo;Liang, Shiyou;Zhang, Xiaojie;Wen, Jia-Long;Yu, Baoting;Liu, Ning;Ralph, John;Yelle, Daniel J.

作者机构：

期刊名称：SCIENCE ADVANCES （ 影响因子：13.6； 五年影响因子：15.4 ）

ISSN： 2375-2548

年卷期： 2023 年 9 卷 21 期

页码：

收录情况： SCI

摘要： Plant cell walls represent the most abundant pool of organic carbon in terrestrial ecosystems but are highly recalcitrant to utilization by microbes and herbivores owing to the physical and chemical barrier provided by lignin biopolymers. Termites are a paradigmatic example of an organism's having evolved the ability to sub-stantially degrade lignified woody plants, yet atomic-scale characterization of lignin depolymerization by ter-mites remains elusive. We report that the phylogenetically derived termite Nasutitermes sp. efficiently degrades lignin via substantial depletion of major interunit linkages and methoxyls by combining isotope-labeled feeding experiments and solution-state and solid-state nuclear magnetic resonance spectroscopy. Exploring the evolutionary origin of lignin depolymerization in termites, we reveal that the early-diverging woodroach Cryptocercus darwini has limited capability in degrading lignocellulose, leaving most polysaccharides intact. Conversely, the phylogenetically basal lineages of "lower" termites are able to disrupt the lignin-polysaccharide inter-and intramolecular bonding while leaving lignin largely intact. These findings advance knowledge on the elusive but efficient delignification in natural systems with implications for next-generation ligninolytic agents.

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