%0 Journal Article %A FISHER, D. J. %A RICHMOND, D. V. %T The Electrokinetic Properties of Some Fungal Spores %D 1969 %J Microbiology, %V 57 %N 1 %P 51-60 %@ 1465-2080 %R https://doi.org/10.1099/00221287-57-1-51 %I Microbiology Society, %X SUMMARY The electrophoretic mobilities of conidia of Alternaria tenuis, Botrytis fabae, Penicillium expansum, Erysiphe graminis, Podosphaera leucotricha and Venturia inaequalis, basidiospores of Stereum purpureum, sporangia and encysted zoospores of Phytophthora infestans were determined in solution at various pH values. The spores all had characteristic and distinct pH-mobility curves. The zero mobility of P. infestans sporangia over the range pH 2 to 11 is consistent with a cellulose surface free from ionizable groups. The mobility of basidiospores of S. purpureum depended entirely on the presence of carboxyl groups. Chemical and enzymic treatments showed both amino and carboxyl groups on A. tenuis and B. fabae; phosphate was present in addition on P. expansum. The amino groups of ϵ-lysine, histidine and leucine contributed to the surface charge of B. fabae; amino acids and tyrosine were detected on A. tenuis. The surface of P. expansum was protein-free and the amino groups present were probably derived from a glucosamine or galactosamine polymer. Washed cell walls and intact conidia of B. fabae were electrophoretically similar but cell walls of P. expansum, unlike normal conidia, were phosphate-free. Mycelial ‘protoplasts’ of A. tenuis and Neurospora crassa and conidial ‘protoplasts’ of B. fabae had pH-mobility curves characteristic of a protein surface. %U https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-57-1-51