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Lysosomes and the Response by Mytilus edulis L. to an Increase in Salinity
Bayne, B.L.; Moore, M.N.; Koehn, R.K. (1981). Lysosomes and the Response by Mytilus edulis L. to an Increase in Salinity. Mar. biol. lett. 2(4): 193-204
In: Marine Biology Letters. Elsevier/North-Holland Biomedical Press: Amsterdam. ISSN 0165-859X, more
Peer reviewed article  

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Keywords
    Lysosomes; Ninhydrin; Salinity; Mytilus edulis Linnaeus, 1758 [WoRMS]; Marine

Authors  Top 
  • Bayne, B.L.
  • Moore, M.N.
  • Koehn, R.K.

Abstract
    Cytochemical observations and measurements on cell-free suspensions of lysosomes from the digestive gland of Mytilus edulis showed a reduced latency of the lysosomal enzyme beta -N-acetyl-hexosaminidase 12h after mussels were transferred from 21 to 35%o salinity, but showed no change up to 6 h after transfer. There was a transient alteration in the form of the latency curve after 6 h at high salinity, signifying a gradual change in membrane integrity. Free hexosaminidase activity increased, 12 h after the salinity rise. The lysosomes were permeable to amino acids when ATP was present; permeability increased following the rise in salinity. The concentration of ninhydrin-positive substances in the lysosomes increased 6 h after transfer and then, between 6 and 12 h, the concentration declined. The results are consistent with the hypothesis that lysosomal hydrolysis is a source of free amino acids during the adaptation of mussels to increased salinity.

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