Fig. 5

Light micrographs of interaction between Polydomus karssenii and wheat roots. a, b Formation of microsclerotia (arrows) inside the plant cells. c Formation of callus tissues/papillae (arrowheads) assumingly as a plant response to fungal colonisation. d En face view of a callosic papilla-like structure formed between two adjacent root cells; the sample was stained with cotton blue. Plants grown on MS medium. Bars = 30 µm