Many microorganisms are able to produce storage compounds under conditions of carbon (C) surplus. Some soil-derived bacteria can accumulate polyhydroxybutyrate (PHB) to as much as 50% of their dry biomass, while the accumulation of neutral lipid fatty acids (NLFA) is well known in eukaryotes. C and energy storage likely plays a central role in microbial physiology and survival, community stoichiometry, and carbon use efficiency, yet its importance has been neglected in experimental and theoretical studies in soil. We have experimentally confirmed the presence of native PHB in soil, and demonstrated for the first time that indigenous soil microorganisms synthesize PHB when supplied with additional carbon. Our PHB method, coupled with isotopic labelling and parallel NLFA analysis, has enabled an investigation of storage compound accumulation and degradation. This focused particularly on the role of C and N stoichiometry and the implications for measures of microbial growth and carbon use efficiency. Our findings bring to light an exciting dimension of soil microbial capabilities, with broad implications for how carbon transformations and life histories in soil are conceptualized.
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Invited by Johanna Pausch, Agroecology
BayCEER Colloquium: |
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Th. 2024-04-18 The Canvas of Change: Creative Marketing for Behaviour Change, Sustainability and Social Good |
Th. 2024-04-18 Survival, 'dormancy', and resuscitation of microorganisms in water-limited environments: insights from coastal salt flats and desert soil crusts |
BayCEER Short Courses: |
Tu. 2024-04-16 Geographical information system and R environment for conservation biology |
Ecological-Botanical Garden: |
Su. 2024-04-07 Führung | Talking Tree: Was Bäume über´s Klima erzählen |
Fr. 2024-04-19 Führung | Gesteine im Ökologisch-Botanischen Garten |