No abstract

Clonal zsolates of Peridinium volzii Lemmermzn were analyzed morphologicall) and bzochemzcall) Morphologzcal obsertutzons at the light microscope lezlel shoul the clones to be diferent varzetzes a n d forms of the same speczes. Bzochemical analqsis bj enzjme electrophoresis and jloul cjtornetrzc deterrninatzon of nuclear D N A quantzttes zndicates that these zsolates ure geneticall) heterogeneous without an) clear correlatzon exzstzng between morphologzcal varzatzon and bzochemzcal zlarzatzon. Isozjme anal)sis, however, zndzcates that strazns from the same locatzon are generall) more related to each other than the) are to zsolates wzth other geographical origins. I n general, our results suggest the presence of genetzc redundanc) and a multiclonal orzgznfor zndzzuduals of the same speczes present zn the same locale

Although two clonal isolates of two different binucleate dinoflagellates Peridinium balticum (Levander) Letnmermann and Glcnodinium foliaceum Stein share a number of unique biochemical and ultrastructural attributes, comparative analysis for sixteen isozyme systems shows that these isolates are quite distinct from each other. Of the 129 different isozyme bands observed, only 28 were common to both organisms. These results support the contention based on plate tabulations that these two isolates should be placed in different genera and suggest that despite certain general biochemical and ultrastructural similarities that the isolates differ significantly at the biochemical and genetic levels and perhaps exhibit different adaptations between host and endosymbiont.