Cytological Study of the Zoospores of Blastocladia

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Abstract
A technique for killing and staining zoospores is described. Plants of Blastocladia prings-heimii and B. globosa are studied while forming zoo-spores under controlled temp. relations. The optimum degrees of temp. for the formation of zoospores are established for these species. The uniciliate condition of the zoospores is shown to be typical for these plants. Biciliate and triciliate zoospores are the result of incomplete cleavage in the sporangium resulting from unfavorable environmental conditions, especially temperature, during the process of zoospore formation. The de-tailed structure of these zoospores is shown. The cilium is inserted in a definite blepharoplast which is attached by a strand to the tip of the nucleus.

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