Microbial cross-feedings hold great significance for microbial survival and growth,which are commonly considered to be determined by functional complementarity.Here we demonstrated landform-dependent cross-feedings be...Microbial cross-feedings hold great significance for microbial survival and growth,which are commonly considered to be determined by functional complementarity.Here we demonstrated landform-dependent cross-feedings between comammox Nitrospira for complete ammonia oxidizing and symbiotic bacteria in the Yangtze River.Although 2 metabolites between co-mammox Nitrospira and symbiotic bacteria were inferred by functional complementarity,a total of 71 metabolites were ex-changed indicated by the newly developed flux balance analysis and optimization algorithm.Comammox Nitrospira served as an amino acid donor in plain regions,but functioned as an amino acid recipient in mountain-foothill regions by modifying cross-feeding modes to adapt to harsh conditions.Large grain sizes in mountain-foothill regions help microbial aggrega-tion.This process benefits comammox Nitrospira with metabolic deficiencies to absorb metabolites from others,to increase their survival capacity.This study highlights the important role of cross-feedings in the microbial community assembly and nitrogen cycling in the Yangtze River.展开更多
文摘Microbial cross-feedings hold great significance for microbial survival and growth,which are commonly considered to be determined by functional complementarity.Here we demonstrated landform-dependent cross-feedings between comammox Nitrospira for complete ammonia oxidizing and symbiotic bacteria in the Yangtze River.Although 2 metabolites between co-mammox Nitrospira and symbiotic bacteria were inferred by functional complementarity,a total of 71 metabolites were ex-changed indicated by the newly developed flux balance analysis and optimization algorithm.Comammox Nitrospira served as an amino acid donor in plain regions,but functioned as an amino acid recipient in mountain-foothill regions by modifying cross-feeding modes to adapt to harsh conditions.Large grain sizes in mountain-foothill regions help microbial aggrega-tion.This process benefits comammox Nitrospira with metabolic deficiencies to absorb metabolites from others,to increase their survival capacity.This study highlights the important role of cross-feedings in the microbial community assembly and nitrogen cycling in the Yangtze River.
