This correspondence provides evidence for a positive interaction of Piriformo-spora indica, a symbiotic fungus with several members of Cruciferae. The evidence is based on in vitro and in vivo studies. P. indica was characterized by Verma et al and subsequently reported for its various positive relations with plants and also being opted as a bio-fertilizer, -protector, -regulator, -fungicide and -pesticide. This fungus also serves as an agent for biological hardening of tissue-culture-raised plants. Interaction with the terrestrial orchids was also demonstrated. 18s rDNA and 28s-rDNA analysis assigned this fungus to Basidiomycetes. P. indica is cultivable on several defined synthetic media and can colonize the root of a large number of hosts. Earlier, we have reported a non-interaction of the fungus with myc~ mutants of soyabean (Glycine max) and pea (Pisum sativum).
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