Handling of ferric iron by branchial and intestinal epithelia of climbing perch (Anabas testudineus Bloch).

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dc.contributor.authorPeter, M C Sen_US
dc.contributor.authorRejitha, Ven_US
dc.contributor.authorDilip, D Gen_US
dc.date.accessioned2009-05-28T16:27:16Z
dc.date.available2009-05-28T16:27:16Z
dc.date.issued2007-10-24en_US
dc.description.abstractWith a view to test how the branchial and intestinal tissues of fish, the two sites of metal acquisition, utilize the water-borne ferric [Fe(III)] iron and whether the accumulation of this form of iron influences cellular Na/K gradient in these tissues, the gills and intestines of climbing perch adapted to freshwater (FW) and acclimated to dilute seawater (20 ppt; SW) were analyzed for ouabain-sensitive Na+, K+-ATPase activity, Fe and electrolyte contents after loading a low (8.95 microM) or high dose (89.5 microM) of Fe(III) iron in the water. The SW gills showed higher levels of total Fe after treating with 8.95 microM of Fe(III) iron which was not seen in the FW gills. Na+, K+-ATPase activity, reflecting Na/K pump activity, showed an increase in the FW gills and not in the SW gills. Substantial increase in the branchial Na and K content was observed in the SW gills, but the FW gills failed to show such effects after Fe(III) loading. The total Fe content was declined in the FW intestine but not in the SW intestine. Water-borne Fe(III) iron decreased the activity of Na+, K+-ATPase in the SW intestine while not changing its activity in the FW intestine. The Na and K content in the FW intestine did not respond to Fe(III) iron exposure but showed a reduction in its Na levels in the SW intestine. The moisture content in the gills and intestines of both the FW and SW perch remained unaffected after Fe(III) loading. In FW fish, the plasma Na levels were decreased by a low dose of Fe(III) iron, though a high dose of Fe(III) iron was required in the SW fish for such an effect. Overall, the results for the first time provide evidence that gills act as a major site for Fe(III) iron absorption and accumulation during salinity acclimation which depends on a high cellular Na/K gradient.en_US
dc.description.affiliationDepartment of Zoology, University of Kerala, Kariavattom, Thiruvananthapuram 695 581, India. subashpeter@yahoo.comen_US
dc.identifier.citationPeter MC, Rejitha V, Dilip DG. Handling of ferric iron by branchial and intestinal epithelia of climbing perch (Anabas testudineus Bloch). Indian Journal of Experimental Biology. 2007 Oct; 45(10): 896-900en_US
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/63253
dc.language.isoengen_US
dc.source.urihttps://www.niscair.res.in/ScienceCommunication/ResearchJournals/rejour/ijeb/ijeb0.aspen_US
dc.source.urihttps://nopr.niscair.res.in/bitstream/123456789/5347/1/IJEB%2045%2810%29%20896-900.pdfen_US
dc.subject.meshAnimalsen_US
dc.subject.meshBronchi --metabolismen_US
dc.subject.meshEpithelium --metabolismen_US
dc.subject.meshFerric Compounds --metabolismen_US
dc.subject.meshFresh Wateren_US
dc.subject.meshIntestines --metabolismen_US
dc.subject.meshPerciformes --metabolismen_US
dc.subject.meshSeawateren_US
dc.titleHandling of ferric iron by branchial and intestinal epithelia of climbing perch (Anabas testudineus Bloch).en_US
dc.typeJournal Articleen_US
dc.typeResearch Support, Non-U.S. Gov'ten_US
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