Function of the crystalline style and first detection of laminarinase activity in freshwater mussels of the genus Anodonta.

Michl, Stephanie C., Windisch, Wilhelm and Geist, Juergen (2014) Function of the crystalline style and first detection of laminarinase activity in freshwater mussels of the genus Anodonta. Journal of Molluscan Studies, 80 (2). pp. 198-200. DOI 10.1093/mollus/eyt053.

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Abstract

Knowledge of the digestive physiology of molluscs is essential for understanding their ecological niches, as well as for their conservation and aquaculture. Freshwater mussels are primarily filter feeders and the complex mechanism of filtration has been studied intensively (Ward et al., 1998; Urrutia et al., 2001; Garrido et al., 2012). However, less is known concerning the physiological mechanisms following ingestion, in particular how food particles are processed in the digestive tract. In bivalves, energy is mostly stored in the form of glycogen, which accounts for 5–14% of the dry weight in Anodonta cygnea (Gäde & Wilps, 1975). For the digestion of various carbohydrates, the crystalline style, a transparent rod composed in part of glycoside hydrolases, is known to be a key component of digestion in the stomach of many snails and marine bivalves. Previous studies (e.g. Alyakrinskaya, 2001) have shown the ability of crystalline style to break down starch in Pseudanodonta complanata and cellulose in Mytilus. Moreover, it has been suggested that crystalline style material not only releases digestive enzymes, but also provides an optimal digestion milieu by buffering ambient pH. Its physiological characteristics, including pH and dissolution, have been described by Hameed (1985) and Warren (1987).

This study evaluates the ability of crystalline styles excised from Anodonta anatina to break down different carbohydrate sources and tests the buffering capacity of style material for providing optimal conditions for digestion.

Document Type: Article
Additional Information: WOS:000335915300012
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EV Marine Evolutionary Ecology
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1093/mollus/eyt053
ISSN: 0260-1230
Projects: HOSST
Date Deposited: 17 Jun 2014 11:37
Last Modified: 03 Apr 2018 12:07
URI: http://oceanrep.geomar.de/id/eprint/24756

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