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Electrostatic Charges on Freshly Discharged Lichen Ascospores

Researches by BuUer (1909) on Agaricus campestris and Polyporus sqiiamosus and Gregory (1967) on Ganoderma applanatum have illustrated that fungal spores bear electric charges when shed into the air. Gregory notes that there is a predominance of positively charged spores in Agaricus campestris, Pholiota squarrosa and Flammula carbonaria and of negatively charged spores in Coprinus micaceus, C. hiascens and Polyporus squamosus, all of which are non-lichenized basidiomycetes. Whilst working on the liberation and dispersal of lichen spores, tests were performed to determine the existence and nature of such charges on freshly ejected ascopores. In conjunction with this and following the observations of Bailey (1970, p. 256) that spiders' webs might form efficient trapping surfaces for airborne soredia, studies were performed to ascertain the role of freshly spun gossamer in spore dispersal.