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Differences in the virulence of Sphaeropsis sapinea strains originating from Scots pine and non‐pine hosts
Author(s) -
Bußkamp Johanna,
Blumenstein Kathrin,
Terhonen Eeva,
Langer Gitta Jutta
Publication year - 2021
Publication title -
forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 1437-4781
DOI - 10.1111/efp.12712
Subject(s) - biology , scots pine , botany , inoculation , mycelium , fagus sylvatica , pinus <genus> , fungus , virulence , beech , plant use of endophytic fungi in defense , endophyte , horticulture , gene , biochemistry
The virulence of 15 endophytic and pathogenic Sphaeropsis sapinea strains was tested towards Scots pine ( Pinus sylvestris ). Two‐thirds of the strains had been isolated from Scots pines with varying health status: five isolates originated from healthy tissue (endophytic fungal stage) and five from diseased tissue (pathogenic stage). One‐third of the strains were isolated from symptomatic tissues of non‐pine hosts: black alder ( Alnus glutinosa ), European beech ( Fagus sylvatica ), European larch ( Larix decidua ), Norway spruce ( Picea abies ) and Douglas fir ( Pseudotsuga menziesii ). The S . sapinea strain isolated from black alder is the first proof that this fungus can form associations with alder species. On four‐year‐old P . sylvestris , one isolate per plant was inoculated on three side‐shoots of seven plants in a greenhouse (21 inoculations/strain). Differences in necrosis size caused by the isolates were measured 55 days after inoculation. The pathogenic S . sapinea isolates originating from diseased Scots pine and from non‐pine hosts were found to cause significantly longer necroses when compared to the endophytic isolates of S . sapinea from symptomless pines.