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Variation in sensitivity of Western Australian isolates of Phytophthora cinnamomi to phosphite in vitro
Author(s) -
Wilkinson C. J.,
Shearer B. L.,
Jackson T. J.,
Hardy G. E. St J.
Publication year - 2001
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1046/j.1365-3059.2001.00539.x
Subject(s) - phytophthora cinnamomi , biology , mating type , botany , phycomycetes , in vitro , horticulture , phytophthora , microbiology and biotechnology , inoculation , genetics , gene
Seventy‐one Australian isolates of Phytophthora cinnamomi (68 from Western Australia) were tested for sensitivity to phosphite on Ribeiro's modified medium. Isolates formed a continuum in their response to phosphite, but could be divided into sensitive (9% of isolates), intermediate (82%) and tolerant (9%) groups. Sensitivity varied between isolates, with EC 50 values ranging from 4 to 148 µ g phosphite mL −1 . Phytophthora cinnamomi A1 mating‐type isolates were at the upper end of the range of tolerance shown by the A2 mating‐type isolates.