-Acetyl-d-Glucosamine-Binding Lectin in Attracts Specific Symbiodiniaceae Cell Culture Strains.

Many corals establish symbiosis with Symbiodiniaceae cells from surrounding environments, but very few Symbiodiniaceae cells exist in the water column. Given that the -acetyl-d-glucosamine-binding lectin ActL attracts Symbiodiniaceae cells, we hypothesized that corals must attract Symbiodiniaceae cells using ActL to acquire them. Anti-ActL antibody inhibited acquisition of Symbiodiniaceae cells, and rearing seawater for juvenile contained ActL, suggesting that juvenile discharge ActL to attract these cells.