Lipoxygenase-induced autoxidative degradation of terrestrial particulate organic matter in estuaries: A widespread process enhanced at high and low latitude

摘要

Highlights?Increasing salinity favored lipoxygenase induction in terrestrial higher plant debris.?Lipoxygenases initiated autoxidative degradation of terrestrial POM in estuaries.?Autoxidative degradation of terrestrial POM enhanced at low and high latitude.?In temperate zones autoxidative damage of terrestrial POM more limited.AbstractThere exists a substantial amount of research on abiotic (e.g. photochemical) degradation pertaining to organic matter (OM) in the marine realm. While recent research has shown its importance in the degradation of terrestrial particulate OM (TPOM), the mechanisms involved in the induction of autoxidation in estuaries remain unclear. In this study, we propose for the first time the involvement of lipoxygenase (LOX) activity in the induction of autoxidation in mixed waters. The observation of unusual profiles of palmitoleic acid oxidation products and the presence of jasmonic acid in