OPENAIRE OpenAire Publikationer från Stockholms universitet Sygma Digitala Vetenskapliga Arkivet - Academic Archive On-line Crossref Europe PubMed Central European Union Open Data Portal https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.19572 https://doi.org/10.1111/nph.19572 New Phytologist Open Access 2024-02-12 Summary<p> <p>A large fraction of plant litter comprises recalcitrant aromatic compounds (lignin and other phenolics). Quantifying the fate of aromatic compounds is difficult, because oxidative degradation of aromatic carbon (C) is a costly but necessary endeavor for microorganisms, and we do not know when gains from the decomposition of aromatic C outweigh energetic costs.</p> <p>To evaluate these tradeoffs, we developed a litter decomposition model in which the aromatic C decomposition rate is optimized dynamically to maximize microbial growth for the given costs of maintaining ligninolytic activity. We tested model performance against &gt;￢ﾀﾉ200 litter decomposition datasets collected from published literature and assessed the effects of climate and litter chemistry on litter decomposition.</p> <p>The model predicted a time￢ﾀﾐvarying ligninolytic oxidation rate, which was used to calculate the lag time before the decomposition of aromatic C is initiated. Warmer conditions increased decomposition rates, shortened the lag time of aromatic C oxidation, and improved microbial C￢ﾀﾐuse efficiency by decreasing the costs of oxidation. Moreover, a higher initial content of aromatic C promoted an earlier start of aromatic C decomposition under any climate.</p> <p>With this contribution, we highlight the application of eco￢ﾀﾐevolutionary approaches based on optimized microbial life strategies as an alternative parametrization scheme for litter decomposition models.</p> </p 0106 biological sciences Naturgeografi aromatic Climate lignin metabolic tradeoff litter decomposition 04 agricultural and veterinary sciences Plants 15. Life on land eco-evolutionary dynamics Lignin Models, Biological 01 natural sciences Carbon Plant Leaves optimal control Biodegradation, Environmental Physical Geography 13. Climate action 0401 agriculture, forestry, and fisheries Oxidation-Reduction Chakrawal, Arjun, Lindahl, Björn D., Manzoni, Stefano, 2024-02-11 journalpaper Summary<p> <p>A large fraction of plant litter comprises recalcitrant aromatic compounds (lignin and other phenolics). Quantifying the fate of aromatic compounds is difficult, because oxidative degradation of aromatic carbon (C) is a costly but necessary endeavor for microorganisms, and we do not know when gains from the decomposition of aromatic C outweigh energetic costs.</p> <p>To evaluate these tradeoffs, we developed a litter decomposition model in which the aromatic C decomposition rate is optimized dynamically to maximize microbial growth for the given costs of maintaining ligninolytic activity. We tested model performance against &gt;￢ﾀﾉ200 litter decomposition datasets collected from published literature and assessed the effects of climate and litter chemistry on litter decomposition.</p> <p>The model predicted a time￢ﾀﾐvarying ligninolytic oxidation rate, which was used to calculate the lag time before the decomposition of aromatic C is initiated. Warmer conditions increased decomposition rates, shortened the lag time of aromatic C oxidation, and improved microbial C￢ﾀﾐuse efficiency by decreasing the costs of oxidation. Moreover, a higher initial content of aromatic C promoted an earlier start of aromatic C decomposition under any climate.</p> <p>With this contribution, we highlight the application of eco￢ﾀﾐevolutionary approaches based on optimized microbial life strategies as an alternative parametrization scheme for litter decomposition models.</p> </p Modelling optimal ligninolytic activity during plant litter decomposition 10.1111/nph.19572 101001608