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Alkaline phosphatase: An appraisal of its critical role in c-limited deep-sea sediments of central Indian Basin

DRS at CSIR-National Institute of Oceanography

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Title Alkaline phosphatase: An appraisal of its critical role in c-limited deep-sea sediments of central Indian Basin
 
Creator Biche, S.U.
Das, A.
Mascarenhas-Pereira, M.B.L.
Nath, B.N.
Naik, Sonali
Helekar, S.
Sharma, R.
Valsangkar, A.B.
LokaBharathi, P.A.
 
Subject Geology and geophysics
Geology and geophysics
Microbiology
Chemistry and biogeochemistry
 
Description Alkaline phosphatase (ALP) is a hydrolase that releases phosphate, a crucial nutrient supporting formation of many macromolecules. The oligotrophic sediments of Central Indian Basin (CIB) were examined for the extent of ALP activity in 20 cores up to 20 cm depth along with other biogeochemical parameters. Northern and southern stations distinctly clustered based on pore water phosphorus (P) concentrations. ALP appeared more active in south due to more P and organic carbon (C) limitation. Central transition profiles revealed interesting mixed diagenetic and geothermal influence. Inter- and intrazonal differences suggest that broadly established paradigms applicable to water columns may deviate in space and time in sedimentary systems. Gross differences in redox status could govern differential response in ALP activity under similar hydrostatic pressure. Hydrothermal scavenging reactions striping soluble P from pore water might be widespread in CIB albeit at extreme low intensities. ALP might redissolve the precipitated P and make it reavailable to microbes
 
Date 2017-09-27T13:09:58Z
2017-09-27T13:09:58Z
2017
 
Type Journal Article
 
Identifier Geomicrobiology Journal, vol.34(3); 2017; 274-288
http://drs.nio.org/drs/handle/2264/5196
 
Language en
 
Rights The final and definitive form of the preprint has been published in the "Geomicrobiology Journal" © 2017 Taylor & Francis; "Geomicrobiology Journal" is available online at http://www.tandfonline.com/loi/ugmb20 with open URL of article : http://www.tandfonline.com/doi/abs/10.1080/01490451.2016.1190804. The term & condition associated with this preprint is at http://www.tandfonline.com/page/terms-and-conditions
 
Publisher Taylor & Francis Group