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THE DEVELOPMENT AND ULTRASTRUCTURE OF ECTOMYCORRHIZAS
Author(s) -
DUDDRIDGE J. A.
Publication year - 1986
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.1469-8137.1986.tb02884.x
Subject(s) - fungus , biology , carbohydrate , symbiosis , botany , host (biology) , ultrastructure , ectomycorrhiza , mycorrhiza , biochemistry , ecology , bacteria , genetics
S ummary The effect of the presence of an exogenous carbon source in the synthesis medium on compatible and incompatible interactions between Suillus grevillei (Klotzsch) Sing, and a number of ectomycorrhizal hosts has been studied at the ultrastructural level. Comparisons are made with the results of the previous study in which carbohydrate was omitted. Observations suggest that the availability of an external source of carbon to the fungus upsets the balance of the symbiosis in favour of the fungal partner, even in compatible interactions, causing changes in the host cell wall and at the host‐fungus interface. The rate and degree of colonization of the root surface is also influenced by the presence of carbohydrate in the synthesis medium. These results suggest that any in vitro studies undertaken on compatibility and specificity in ectomycorrhizal associations should omit carbohydrate from the medium or use an aseptically synthesized donor host as the source of fungal inoculum.