Lineage, Temperature, and Host Species have Interacting Effects on Lesion Development in Phytophthora ramorum. Eyre, C., A., Hayden, K., J., Kozanitas, M., Grünwald, N., J., & Garbelotto, M. PLANT DISEASE, 98(12):1717-1727, 12, 2014. abstract bibtex There are four recognized clonal lineages of the pathogen Phytophthora
ramorum. The two major lineages present in North America are NA1 and
NA2. With a few exceptions, NA1 is found in natural forest ecosystems
and nurseries, and NA2 is generally restricted to nurseries. Isolates
from the NA1 and NA2 lineages were used to infect rhododendron,
camellia, and California bay laurel in detached leaf assays to study the
effects of lineage, temperature, and host on pathogenicity and host
susceptibility. Isolates within both lineages were highly variable in
their ability to form lesions on each host. There was also a tendency
toward reduced lesion size in successive trials, suggesting degeneration
of isolates over time. Temperature had a significant effect on lesion
size, with a response that varied depending on the host and isolate.
Phenotypic differences between lineages appear to be heavily influenced
by the representation of isolates used, host, and temperature. The
importance of temperature, host, and lineage are discussed with respect
to disease management, as well as future range expansions and migrations
of the pathogen.
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title = {Lineage, Temperature, and Host Species have Interacting Effects on Lesion Development in Phytophthora ramorum},
type = {article},
year = {2014},
identifiers = {[object Object]},
pages = {1717-1727},
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abstract = {There are four recognized clonal lineages of the pathogen Phytophthora
ramorum. The two major lineages present in North America are NA1 and
NA2. With a few exceptions, NA1 is found in natural forest ecosystems
and nurseries, and NA2 is generally restricted to nurseries. Isolates
from the NA1 and NA2 lineages were used to infect rhododendron,
camellia, and California bay laurel in detached leaf assays to study the
effects of lineage, temperature, and host on pathogenicity and host
susceptibility. Isolates within both lineages were highly variable in
their ability to form lesions on each host. There was also a tendency
toward reduced lesion size in successive trials, suggesting degeneration
of isolates over time. Temperature had a significant effect on lesion
size, with a response that varied depending on the host and isolate.
Phenotypic differences between lineages appear to be heavily influenced
by the representation of isolates used, host, and temperature. The
importance of temperature, host, and lineage are discussed with respect
to disease management, as well as future range expansions and migrations
of the pathogen.},
bibtype = {article},
author = {Eyre, C A and Hayden, K J and Kozanitas, M and Grünwald, Niklaus J. and Garbelotto, M},
journal = {PLANT DISEASE},
number = {12}
}
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