Open AccessPhytophthora cinnamomi and other fine root pathogens in north temperate pine forests
Author(s) -
Chavarriaga Didier,
Bodles William J.A.,
Leifert Carlo,
Belbahri Lassaad,
Woodward Steve
Publication year - 2007
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.2007.00914.x
Subject(s) - phytophthora cinnamomi , pythium ultimum , biology , pythium , root rot , botany , phytophthora , scots pine , phycomycetes , damping off , horticulture , biological pest control , inoculation , pinus <genus>
A number of fine root pathogens, including Phytophthora cinnamomi , Pythium ultimum var. ultimum , Pythium undulatum , Pythium violae , Fusarium sp., and two incompletely identified Verticillium species, were isolated from soils taken from under Scots pine trees at five sites in north Scotland, including semi‐natural forests and plantations. At least two root pathogens were recovered from each forest. Morphological and molecular data supported the identification of Phytophthora cinnamomi from three of the sites investigated. Isolates of Phytophthora cinnamomi , Pythium ultimum var. ultimum and an incompletely identified Fusarium sp. caused growth reductions of Scots pine seedlings, as determined by dry weight; the most virulent species were Phytophthora cinnamomi and Fusarium sp. The most severe disease symptoms were caused by a mixed inoculum containing Phytophthora cinnamomi , Pythium ultimum var. ultimum and Fusarium sp., or by the Fusarium isolate alone. These nonspecific pathogens may persist on the roots of understorey and herbaceous plants in the pine forests.