Evolutionary adaptation of anaerobic and aerobic metabolism to high sulfide and hypoxic hydrothermal vent crab, Xenograpsus testudinatus.

ABSTRACT: The vent crab, Xenograpsus testudinatus (xtcrab), is adapted to inhabit shallow-water, high sulfide and hypoxic hydrothermal vent. Our previous study revealed sulfide tolerance of vent xtcrabs which sulfide: quinone oxidoreductase (xtSQR) paralogs aid in sulfide detoxification. However, the mechanisms of how xtcrab adapts to high sulfide-hypoxic conditions in the vent area remain to be explored. In the present study, we tested the tolerance of xtcrab to sulfide-induced hypoxia, and investigated their aerobic and anaerobic responses in situ and in the laboratory. Comparisons were made to a non-vent, intertidal species, Thranita danae (tdcrab). We analyzed the several factors related to aerobic metabolism (SQR, cytochrome c [CYTC], complex IV [COXIV]), the product of anaerobic metabolism (he

SUBMITTER: Chen C 

PROVIDER: S-EPMC12808302 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature