Two varieties of Rhizophydium sphaerocarpum (Chytridiales)
- 1 June 1970
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Botany
- Vol. 48 (6) , 1067-1071
- https://doi.org/10.1139/b70-154
Abstract
Two varieties of Rhizophydium sphaerocarpum (Zopf) Fischer are proposed: var. sphaerocarpum, saprophytic on algae, nematodes, and pine pollen; and var. spirogyrae, a parasite of Spirogyra spp. The varieties differ morphologically only in colony color and texture. Variety sphaerocarpum grew best at (10–) 15–20 C and used inorganic nitrogen as ammonium chloride, ammonium nitrate, and sodium nitrate when the inoculum contained actively growing thalli, whereas var. spirogyrae grew best at (25–) 30 C and did not use inorganic nitrogen. Results of pH range tests and carbon nutrition were very similar for the two varieties and both required exogenous thiamine.Keywords
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