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The ultrastructure of the stroma of the brown rot fungi
Authors:H. J. Willetts  F. D. Calonge
Affiliation:(1) Department of Botany, University of Bristol, Bristol, UK;(2) School of Botany, University of New South Wales, Kensington, N.S.W., Australia;(3) Instituto Botanico "ldquo"A. J. Cavanilles"rdquo", C.S.I.C., Madrid, Spain
Abstract:Summary Most of the hyphae forming the medulla of the stroma of the brown rot fungi are 4–7 mgr in diameter and contain food reserves in large vacuoles and lipid bodies. Some stromatal hyphae have very thick walls and perform a protective function. Smaller hyphae (1–2 mgr in diameter) form a network through the medulla and their structure suggests that they initiate the growth of vegetative hyphae and spores after the stroma has passed through a period of rest.
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