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Biol Bull 150: 47-56. (February 1976)
© 1976 Marine Biological Laboratory
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A HISTOCHEMICAL STUDY OF CEMENT SECRETION DURING THE INTERMOLT CYCLE IN BARNACLES

UNNI E. H. FYHN 1 and JOHN D. COSTLOW 1

1 Duke University Marine Laboratory, Beaufort, North Carolina 28516

1. Regions of secretion accumulation and secretion synthesis were found in the cytoplasm of cement gland cells of adult Balanus amphitrite and B. eburneus. In contact with the accumulation regions collector canals were running extracellularly in infoldings of the plasma membrane and showed increasing ramification with increasing size of the cement gland cell.

2. In B. amphitrite the secretion accumulation was at its maximum in stage B1 of the intermolt cycle, decreased during stage B2, was zero in C and increased from D1 to D2. A similar variation in B. eburneus seemed probable.

3. The histochemistry of the accumulation and synthesis areas was studied.

4. In B. amphitrite maintained in aquaria before fixation, no secretion accumulation was observed in cement gland cells irrespective of molt stage of the animal.

5. The study shows that detectable secretion accumulation in cement gland cells of adult barnacles is not necessarily a species characteristic, but may be dependent upon endogenous as well as exogenous factors.




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K. Kamino, K. Inoue, T. Maruyama, N. Takamatsu, S. Harayama, and Y. Shizuri
Barnacle Cement Proteins. IMPORTANCE OF DISULFIDE BONDS IN THEIR INSOLUBILITY
J. Biol. Chem., August 25, 2000; 275(35): 27360 - 27365.
[Abstract] [Full Text] [PDF]


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