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Comparison of Gremmeniella abietina isolates from Pinus sylvestris and Pinus contorta in terms of conidial morphology and host colonization
Author(s) -
Hellgren M.
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.tb00331.x
Subject(s) - pinus contorta , biology , colonization , pinus <genus> , inoculation , conidium , botany , host (biology) , mycelium , shoot , seedling , fungus , horticulture , ecology
Summary Gremmeniella abietina isolates from Pinus contorta in northern Sweden produced, in vitro, shorter conidia with fewer septa compared with isolates from Pinus sylvestris in the southern part of the country. After mycelial inoculation of shoots with G. abietina isolates from both host species, the resulting necroses were longer in P. sylvestris than in P. contorta . Keeping seedlings in artificial mild winter climate or detaching shoots from the seedling before inoculation caused longer necroses. No host specificity in colonization was found. Isolates from P. sylvestris caused longer necroses than did isolates from P. contorta , and both types of isolates caused longer necroses in P. sylvestris than in P. contorta . The differences found between the two G. abietina populations probably reflect regional variation in the fungus.