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Fungi colonizing Scots‐pine cone scales and seeds and their pathogenicity
Author(s) -
Lilja A.,
Hallaksela A. M.,
Hein R.
Publication year - 1995
Publication title -
european journal of forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 0300-1237
DOI - 10.1111/j.1439-0329.1995.tb01070.x
Subject(s) - biology , alternaria alternata , botany , scots pine , hypha , pathogenicity , agar , agar plate , fusarium , microbiology and biotechnology , horticulture , bacteria , pinus <genus> , genetics
Summary Fungi were isolated from the cone scales and seeds of Scots pine using plating on malt‐extract agar and/or the standard blotter method in a Jacobsen's apparatus. Alternaria alternata, Epicoccum purpurascens and Ulocladium atrum were isolated from damping‐off seedlings germinating on agar or filter paper, but, in pathogenicity tests with peat‐sand (1:3) growth substrate, they were not pathogenic. All the Fusarium species isolated were pathogenic in growth substrate. Some F. avenaceum colonies formed no aerial hyphae and they proved to be a mixed culture of the fungus, a fluorescent Pseudomonas sp., and a gram‐negative bacterium. The bacterial associates appeared to increase the pathogenicity of F. avenaceum . All the micro‐organisms tested were more pathogenic in sterilized than in unsterilized peat‐sand substrate.