Sugars, Lipids and More: New Insights Into Plant Carbon Sources During Plant-Microbe Interactions.

Summary

This review, published in Plant, Cell & Environment (2025), synthesises emerging evidence on the diversity of carbon sources — beyond simple sugars — that plants allocate to microbial partners during both mutualistic and antagonistic interactions. The authors likely highlight lipids and other metabolites as increasingly recognised components of plant carbon investment in associations such as arbuscular mycorrhizal symbioses and pathogen interactions. The paper contributes to a refined understanding of how plants regulate carbon economy at the plant-microbe interface, with implications for soil carbon cycling and microbiome management.

UK applicability

Although this is a fundamental molecular-biological review with no specific geographic focus, its findings are broadly applicable to UK arable and horticultural systems where mycorrhizal inoculants and rhizosphere management are of growing agronomic and policy interest. Understanding plant carbon allocation to soil microbes underpins sustainable soil health strategies relevant to UK agricultural transition.

Key measures

Carbon compound types (sugars, lipids, organic acids, amino acids); plant-microbe interaction categories (symbiotic, pathogenic); molecular transport mechanisms; metabolic flux at the rhizosphere or symbiotic interface

Outcomes reported

The review examines the range of carbon compounds — including sugars, lipids, and other metabolites — that plants supply to microbial partners or pathogens, and how these carbon sources differ across interaction types. It likely synthesises recent molecular and biochemical evidence on the mechanisms and regulation of carbon transfer at the plant-microbe interface.

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