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. Author manuscript; available in PMC: 2018 Jul 18.
Published in final edited form as: Curr Opin Microbiol. 2018 Jan 12;43:108–116. doi: 10.1016/j.mib.2017.12.013

Figure 2.

Figure 2

Distinct molecular cues from environmental Bacteroidetes and Gammaproteobacteria regulate developmental transitions in diverse marine eukaryotes. The Bacteroidetes bacteria Algoriphagus and Zobellia uliginosa regulate morphogenesis in organisms as diverse as algae and choanoflagellates. (1) Uncharacterized factors produced by Algoriphagus induce morphogenesis in the macroalgae Ulva mutabilis. (2) Algoriphagus machipongonensis lipids [sulfonolipids, lysophosphatidylethanolamines, and a capnine] regulate rosette development in the choanoflagellate Salpingoeca rosetta. (3) Thallusin, an amino acid derivative produced by Zobellia uliginosa, induces morphogenesis in the macroalgae Monostroma oxyspermum. (4) Uncharacterized molecules from Zobellia uliginosa induce rosette development in the choanoflagellate Salpinogeca rosetta. Gammaproteobacteria can likewise elicit developmental responses in diverse animals and choanoflagellates. (5) Tetrabromopyrrole produced by Pseudoalteromonas spp. induces larval metamorphosis in corals Acropora millepora and Acropora willisae, and larval settlement (attachment and metamorphosis) in the coral Porites astreoides. (6) Uncharacterized cues from Pseudoalteromonas bacteria induce larval settlement in the sea urchin Heliocidaris erythrogramma. (7) Pseudoalteromonas luteoviolacea produces arrays of contractile phage tail-like structures (MACs) that trigger metamorphosis of the tubeworm Hydroides elegans. (8) A chondroitinase (EroS) secreted by Vibrio fischeri induces mating in the choanoflagellate S. rosetta. (9) Unknown cues secreted by Vibrio alginolyticus induce larval metamorphosis in the jellyfish Cassiopea andromeda.