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Symbiotic marine bacteria chemically defend crustacean embryos from a pathogenic fungus


Science (Washington D C) 246(4926): 116-118
Symbiotic marine bacteria chemically defend crustacean embryos from a pathogenic fungus
Embryos of the shrimp Palaemon macrodactylus are remarkably resistant to infection by the fungus Lagnidium callinectes, a recognized pathogen of many crustaceans. An Alteromonas sp. bacterial strain consistently isolated from the surface of the embryos, produces 2,3-indolinedione (isatin), a compound that inhibits the pathogenic fungus. If exposed to the fungus, bacteria-free embryos quickly die, whereas similar embryos reinoculated with the bacteria or treated only with 2,3-indolinedione live well. The commensal Alteromonas sp. bacteria protect shrimp embryos from fungal infection by producing and liberating the antifungal metabolite 2,3-indolinedione.

Accession: 001962116

PMID: 2781297

DOI: 10.1126/science.2781297

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