Direct and indirect influence of sulfur availability on phytoplankton evolutionary trajectories.

摘要: The sulfate facilitation hypothesis suggests that changes in ocean concentration influenced the rise to dominance of phytoplankton species red lineage. mechanistic reasons for this phenomenon are not yet understood. We started address question by investigating differences S utilization algae green and lineages cyanobacteria cultured presence either 5 mmol · L-1 (approximately equivalent Paleozoic concentrations) or 30 mmol · L-1 (corresponding post-Mesozoic/extant sulfate. activities main enzymes involved SO42- assimilation changed response growth concentration. ATP sulfurylase showed different kinetics various taxa, with an especially odd behavior dinoflagellate. Sulfate availability had a modest effect on cell organic composition. Species-specific use some elements were instead obvious grown concentrations, overall confirming lineage do better at high than increase may thus have impact radiation both through their enzymatic machinery indirect repercussion elemental usage.