Effect of hyperosmotic stress on hemolymph protein, muscle ninhydrin-positive substances and free amino acids in Macrobrachium rosenbergii (de man)
1. Acclimation of M. rosenberqii by gradual transfer from dilute to more concentrated media caused a significant decrease in the hemolymph protein content. 2. This phenomenon is related with a concomittant increase in muscle ninhydrin-positive substances (NPS) and free amino acids (FAA). The hemo...
| Main Authors: | , |
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| Format: | Article |
| Language: | English English |
| Published: |
Elsevier
1981
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| Online Access: | http://psasir.upm.edu.my/id/eprint/33851/ http://psasir.upm.edu.my/id/eprint/33851/1/33851%20effect%20of%20hyperosmotic.pdf http://psasir.upm.edu.my/id/eprint/33851/7/1-s2.0-0300962981925597-main.pdf |
| Summary: | 1. Acclimation of M. rosenberqii by gradual transfer from dilute to more concentrated media caused a significant decrease in the hemolymph protein content.
2. This phenomenon is related with a concomittant increase in muscle ninhydrin-positive substances (NPS) and free amino acids (FAA). The hemolymph NPS is, however, independent of salinity.
3. Glutamic acid, proline, glycine, alanine and arginine constitute 70-80% of the total muscle free amino acids, and their concentrations were elevated by as much as 300% during acclimation to seawater.
4. The results indicate the involvement of FAA in intracellular osmotic adjustments to hyper osmotic stress. |
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