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FINE STRUCTURE OF MYCORRHIZA FORMED BY CENOCOCCUM GEOPHILUM FR. ON TILIA CORDATA MILL
Author(s) -
PIGOTT C. D.
Publication year - 1982
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1982.tb03408.x
Subject(s) - hypha , botany , biology , mycorrhiza , arbuscular mycorrhiza , symbiosis , bacteria , genetics
SUMMARY Mycorrhizas formed by Cenococcum geophilum were collected from seedlings of Tilia cordata growing on sandy soil in which the water content was only 2 to 3 % of dry mass (equivalent to water potentials of − 18 to − 55 bars). The fine structure of the mycorrhiza shows that the majority of cells of the fungal mantle, of the bristle‐like extended hyphae and of the root contain living protoplasts with organelles of normal appearance. The mantle and Hartig net are compact tissues (synenchyma) and the outer cells of the mantle and the extended hyphae have thick walls in which the outer electron‐opaque layer has a microfibrillar structure. Hyphal septa in the Hartig net, mantle and extended hyphae are electron‐transparent and have simple pores with Woronin‐bodies. Cells of the root, adjacent to the Hartig net, contain high densities of mitochondria but there is no penetration of intracellular fungal structures (haustoria). There is a well‐defined zone of tannin‐cells.