AI Article Synopsis
- The paper examines the detailed structure of zoospores from the marine organism Maullinia ectocarpii, which infects the algae Ectocarpus siliculosus.
- It finds that these zoospores closely resemble those of other species like Polymyxa graminis and Phagomyxa sp.
- The study reveals that M. ectocarpii has a complete life cycle with two types of plasmodia, producing primary and secondary zoospores that differ in their flagella orientation and the thickness of their sporangial walls.
Article Abstract
The present paper deals with the ultrastructure of zoospores produced by the plasmodiophorid Maullinia ectocarpii, living in the marine algal host Ectocarpus siliculosus. The zoospores described here are very similar to secondary zoospores of Polymyxa graminis and Phagomyxa sp. (the latter an algal endoparasite, also). Our results indicate that M. ectocarpii produces two types of plasmodia, and suggest that is a species with a complete life cycle, as it is known for all the Plasmodiophormycota that have been studied. Sporogenic and sporangial plasmodia produce, respectively, primary zoospores with parallel flagella within thick walled resting sporangia, and secondary zoospores with opposite flagella within thin walled sporangia.
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