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A Physiological Comparison of the Symbiotic Alga Platymonas Convolutae and its Free-Living Relatives

Published online by Cambridge University Press:  11 May 2009

G. W. Gooday
G. W. Gooday
Affiliation:
Department of Botany, Leeds University1
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Extract

Platymonas convolutae Parke et Manton is the natural algal partner of the symbiotic worm Convoluta roscoffensis Graff (Parke & Manton 1967). Recent work by Provasoli, Yamasu & Manton (1968) has shown that although several algae can form a symbiotic relationship with the worm if supplied in unialgal culture, the natural symbiont is the most effective and is able to eliminate competitors. The alga can be cultured in a denned medium away from its partner, and this paper presents some physiological characteristics of the alga in pure culture in comparison with some of its free-living relatives, in particular the type species of the genus Platymonas, P. tetrathele G. S. West. The present investigation has been concerned mainly with the uptake of carbohydrates and the utilization of organic nitrogen. Other aspects that are included are the excretion of metabolites into the medium and the soluble carbohydrates found within the algae. In addition, culturing the algae has revealed a difference in behaviour of possible relevance to the symbiotic relationship.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 50 , Issue 1 , February 1970 , pp. 199 - 208
Copyright
Copyright © Marine Biological Association of the United Kingdom 1970

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