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The intracellular fluid isosmotic regulation in yellow clam <i>Sunetta scripta </i>L. <span style="font-size:14.0pt;line-height:115%;font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";color:black;mso-ansi-language:EN-IN; mso-fareast-language:EN-IN;mso-bidi-language:HI" lang="EN-IN">(Mollusca: Bivalvia) acclimated to different salnities</span>

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Title The intracellular fluid isosmotic regulation in yellow clam Sunetta scripta L. (Mollusca: Bivalvia) acclimated to different salnities
 
Creator George, P. J.
Damodaran, R.
 
Description 83-86
Sunetta
scripta is an osmoconformer and relies heavily on intracellular fluid
isosmotic regulation. A conspicuous reduction in the intracellular ninhydrin
positive substances (NPS) is noticed in the bivalves exposed to hypoosmotic
stress. The role of NPS in the hemolymph osmolarity is negligible whereas it
contributes substantially to the intracellular medium. Taurine, glycine,
proline, alanine, glutamate and aspartate are not only the dominant solutes in
the cytoplasm but also the most varied ones in the isosmotic regulation. The
nitrogenous osmolytes acts as compatible over wide variations in their
concentration and hence the euryhalinity of the bivalve depends upon these
osmoprotectants. The presence of arginine, lysine, serine and threonine

is observed but they seem to
have comparatively limited role in the process. Significant qualitative
difference is noticed between tissues but the variation is quantitative among
size groups. The principal osmolyte is glycine in adductor muscle whereas it is
taurine in mantle tissue and foot muscle. Overall taurine is found to be the
most abundant and varied osmolyte. Consequently, S. scripta subjected to
hyperosmotic stress is a potential source of taurine.
 
Date 2014-01-14T14:32:30Z
2014-01-14T14:32:30Z
1999-03
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/25614
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.28(1) [March 1999]