[A comparison of the amount of DNA in the sporoplasm nuclei of the myxosporidian and actinosporidian phases of the life cycle of the parasitic protozoan Zschokkella nova--a representative of the Myxozoa type]. / Sravnenie kolichestva DNK v iadrakh sporoplazm miksosporeinoi i aktinosporeinoi faz zhiznennogo tsikla paraziticheskogo prosteishego Zschokkella nova--predstavitelia tipa Myxozoa.

Average DNA amounts in sporoplasm nuclei of the actinosporean and myxosporean developmental phases of Z. nova were compared. The average DNA amount per one, presumably diploid, sporoplasm nucleus of the actinosporean phase spores was twice as large as the average summarized DNA amount in two, presumably haploid, nuclei of the myxospsorean phase spores of Z. nova. It is suggested that sporoplasm nuclei in the actinosporean phase spores of Z. nova are diploid postsynthetic, whereas sporoplasm nuclei of the myxosporean phase spores are haploid. The data do not contradict the earlier supposition (Uspenskaya, 1955a, 1955b), that the investigated spores may be developmental stages of the same organism. The data support the idea of haploidy of the myxosporean phase spores (Uspenskaya, 1984) and diploidy of the actinosporean phase spores (Marques, 1984) in Myxozoa.