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Distribution of the Digestive Enzymes in the Gut of Arenicola Marina

Published online by Cambridge University Press:  11 May 2009

M. R. Longbottom
M. R. Longbottom
Affiliation:
Dove Marine Laboratory, University of Newcastle upon Tyne, Cullercoats, North Shields, Northumberland1
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Extract

Investigations on the digestive enzymes of polychaetes have, in most cases, been limited to the presence or absence of protein (gelatin) digesting and starch digesting enzymes. These enzymes have been shown to be present in all the polychaetes that have been studied (Mansour-Bek, 1954; Dales, 1955; Marsden, 1963). The results for the lugworm, Arenicola marina (L.) have been varied. Recent work has indicated the presence of enzymes capable of digesting starch and gelatin in the oesophagus, oesophageal pouches and the stomach of the lugworm (Kermack, 1955). However, Brasil (1903) found that no digestion took place when secreted fluids of the oesophageal pouches were incubated with starch, though fibrin was digested both by these fluids and a water extract of the ‘caeca’. Nicol (1930) records the work of Krukenberg, who found that proteolytic enzymes were present in the gut of A. marina. Kermack (1955) noted that the stomach was slightly acidic, though Nicol (1930) records the work of Wirèn, who found that the contents of the ‘intestine’ and the ‘intestinal caeca’ of A. marina were alkaline. As there have been no detailed analyses of the digestive enzymes of the lugworm, a survey of the distribution of carbohydrases, proteases and lipases in the gut of A. marina was carried out, and the optimal range of the carbohydrases investigated.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 50 , Issue 1 , February 1970 , pp. 121 - 128
Copyright
Copyright © Marine Biological Association of the United Kingdom 1970

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References

REFERENCES

Brasil, L., 1903. Origine et rôle de la sécrétion des coecums oesophagiens de 1'Arénicole. Archs Zool. exp. gén., T. I (note III), pp. VI–XIII.Google Scholar
Dales, R. P., 1955. Feeding and digestion in terebellid polychaetes. J. mar. biol. Ass. U.K., Vol. 34, pp. 55–79Google Scholar
Davis, N. C. & Smith, E. L., 1955. Assay of proteolytic enzymes. In Methods of Biochemical Analysis, (ed. D., Glick), Vol. 2, pp. 215–57. Interscience. London: John Willey and Sons.Google Scholar
Kermack, D. M., 1955. The anatomy and physiology of the gut of the polychaete Arenicola marina (L.). Proc. zool. Soc. Lond., Vol. 125, pp. 347–81.Google Scholar
Mansour-Bek, J. J., 1954. The digestive enzymes in invertebrata and protochordata. Tabul. biol., Vol. 21, pp. 75–367.Google Scholar
Marsden, J. R., 1963. A preliminary report on digestive enzymes of Hermodice carunculata. Can. J. Zool., Vol. 41, pp. 159–64.CrossRefGoogle Scholar
Marsden, J. R., 1966. The coelomocytes of Hermodice carunculata (Polychaeta: Amphinomidae) in relation to digestion and excretion. Can. J. Zool., Vol. 44, PP- 377–89CrossRefGoogle Scholar
Nachlas, M. M. & Saligman, A. M., 1949. Evidence for the specificity of esterase and lipase by the use of three chromogenic substrates. J. biol. Chem., Vol. 181, PP. 343–55CrossRefGoogle ScholarPubMed
Nicol, E. A. T., 1930. The feeding mechanism, formation of the tube, and physiology of digestion in Sabella pavonina. Trans. R. Soc. Edinb., Vol. 56, pp. 537–98.Google Scholar
Somogyi, M., 1952. Notes on sugar determination. J. biol. Chem., Vol. 195, pp. 19–23.CrossRefGoogle Scholar