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- W4385442969 abstract "Abstract Drought impacts on microbial activity can alter soil carbon fate and lead to the loss of stored carbon to the atmosphere as CO 2 and volatile organic compounds (VOCs). Here we examined drought impacts on carbon allocation by soil microbes in the Biosphere 2 artificial tropical rainforest by tracking 13 C from position-specific 13 C-pyruvate into CO 2 and VOCs in parallel with multi-omics. During drought, efflux of 13 C-enriched acetate, acetone and C 4 H 6 O 2 (diacetyl) increased. These changes represent increased production and buildup of intermediate metabolites driven by decreased carbon cycling efficiency. Simultaneously, 13 C-CO 2 efflux decreased, driven by a decrease in microbial activity. However, the microbial carbon allocation to energy gain relative to biosynthesis was unchanged, signifying maintained energy demand for biosynthesis of VOCs and other drought-stress-induced pathways. Overall, while carbon loss to the atmosphere via CO 2 decreased during drought, carbon loss via efflux of VOCs increased, indicating microbially induced shifts in soil carbon fate." @default.
- W4385442969 created "2023-08-02" @default.
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- W4385442969 date "2023-07-31" @default.
- W4385442969 modified "2023-10-14" @default.
- W4385442969 title "Drought re-routes soil microbial carbon metabolism towards emission of volatile metabolites in an artificial tropical rainforest" @default.
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