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Expression studies on NA+/K+-ATPase in gills of Penaeus monodon (Fabricius) acclimated to different salinities.

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Title Expression studies on NA+/K+-ATPase in gills of Penaeus monodon (Fabricius) acclimated to different salinities.
 
Creator Aparna Chaudhari
Gireesh Babu Pathakota
Gayatri Tripathi
Supriya Sabnis
Dhamotharan K
Remya Varadrajan
Kavita Kumari
Subrata Dasgupta
K.V.Rajendran
 
Subject Asian tiger shrimp,Giant tiger prawn,Immunolocalization,Ion transport,osmoregulation,Salinity
 
Description Not Available
The decapod crustacean Penaeus monodon survives large fluctuations in salinity through osmoregulation in which Na+/ K+-ATPase (NKA) activity in the gills plays a central role, Adult P. monodon specimens were gradually acclimatized to 5, 25 and 35% salinities and maintained for 20 days to observe long term alterations in NKA expression. Specific NKA activity assayed in gill tissues was found to be 3 folds higher at 5% compared to 25% (isosmotic salinity) and 0.48 folds lower at 35%. The enzyme was immunolocalized in gills using mouse q-5 monoclonal antibody that cross reacts with P. monodon NKA a-subunit. At 5% the immunopositive cells were distributed on lamellar tips and basal lamellar epithelium of the secondary gill filaments and their number was visibly higher. At both 25% and 35% NKA positive cells were observed in the inter-lamellar region but the expression was more pronounced at 25% Gill architecture was normal at all salinities. However, the 1.5 fold increase in NKA a-subunit mRNA at 5% measured by quantitative RT-PCR (QRT-PCR) using EFIa as reference gene was not statistically significant. The study confirms the osmoregulating ability of P. monodon like other crustaceans at lower salinities. It is likely that significant increase in NKA transcript level happens at an earlier time point. At higher salinities all three methods record only marginal or no change from isosmotic controls confirming the hypothesis that the animal largely osmoconforms in hyperosmotic environment.
 
Date 2021-11-01T09:59:07Z
2021-11-01T09:59:07Z
2014-5-26
 
Type Research Paper
 
Identifier Chaudhari, A.*, Gireesh-Babu, P., Tripathi, G., Sabnis, S., Dhamotharan, K., Vardarajan, R., Kumari, K., Dasgupta, S. and Rajendran, K.V., 2015. Expression studies on NA+/K+-ATPase in gills of Penaeus monodon (Fabricius) acclimated to different salinities. International Journal of Experimental Biolo
Not Available
0975-1009
http://krishi.icar.gov.in/jspui/handle/123456789/66711
 
Language English
 
Publisher Not Available