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Sci Rep

Title:		Rapid Hydrogen Peroxide release from the coral Stylophora pistillata during feeding and in response to chemical and physical stimuli
Author(s):		Armoza-Zvuloni R; Schneider A; Sher D; Shaked Y;
Address:		"Interuniversity Institute for Marine Sciences, Eilat, 88103, Israel. The Fredy &Nadine Herrmann Institute of Earth Sciences, The Hebrew University, Jerusalem, 91904, Israel. Department of Marine Biology, Charney School of Marine Sciences, Haifa University, Haifa, Israel"
Journal Title:		Sci Rep
Year:		2016
Volume:		20160215
Issue:
Page Number:		21000 -
DOI:		10.1038/srep21000
ISSN/ISBN:		2045-2322 (Electronic) 2045-2322 (Linking)
Abstract:		"Corals make use of different chemical compounds during interactions with prey, predators and aggressors. Hydrogen Peroxide (H2O2) is produced and released by a wide range of organisms as part of their defense against grazers or pathogens. In coral reefs, the large fluxes and relatively long half-life of H2O2, make it a potentially important info-chemical or defense molecule. Here we describe a previously unstudied phenomenon of rapid H2O2 release from the reef-building coral Stylophora pistillata during feeding on zooplankton and in response to chemical and physical stimuli. Following stimuli, both symbiotic and bleached corals were found to rapidly release H2O2 to the surrounding water for a short period of time (few minutes). The H2O2 release was restricted to the site of stimulus, and an increase in physical stress and chemical stimuli concentration resulted in elevated H2O2 release. Omission of calcium (a key regulator of exocytotic processes) from the experimental medium inhibited H2O2 release. Hence we suggest that H2O2 is actively released in response to stimuli, rather than leaking passively from the coral tissue. We estimate that at the site of stimulus H2O2 can reach concentrations potentially high enough to deter predators or motile, potentially pathogenic, bacteria"
Keywords:		Animals Anthozoa/*metabolism/physiology Calcium/metabolism Coral Reefs Escape Reaction/*physiology Hydrogen Peroxide/*metabolism Zooplankton/metabolism;
Notes:		"MedlineArmoza-Zvuloni, Rachel Schneider, Avi Sher, Daniel Shaked, Yeala eng Research Support, Non-U.S. Gov't England 2016/02/16 Sci Rep. 2016 Feb 15; 6:21000. doi: 10.1038/srep21000"