10.5061/DRYAD.8PB0B1F
Masini, Laura
Swedish University of Agricultural Sciences
Grenville-Briggs, Laura J.
Swedish University of Agricultural Sciences
Andreasson, Erik
Swedish University of Agricultural Sciences
Råberg, Lars
Lund University
Lankinen, Asa
Swedish University of Agricultural Sciences
Data from: Tolerance and overcompensation to infection by Phytophthora
infestans in the wild perennial climber Solanum dulcamara
Dryad
dataset
2019
Host-pathogen interactions
overcompensation
late blight
Solanum dulcamara
Phytophthora infestans
Holocene
Tolerance
2019-04-12T13:02:22Z
2019-04-12T13:02:22Z
en
https://doi.org/10.1002/ece3.5057
85000 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Studies of infection by Phytophthora infestans—the causal agent of potato
late blight—in wild species can provide novel insights into plant defense
responses, and indicate how wild plants might be influenced by recurrent
epidemics in agricultural fields. In the present study, our aim was to
investigate if different clones of Solanum dulcamara (a relative of
potato) collected in the wild differ in resistance and tolerance to
infection by a common European isolate of P. infestans. We performed
infection experiments with six S. dulcamara genotypes (clones) both in the
laboratory and in the field and measured the degree of infection and plant
performance traits. In the laboratory, the six evaluated genotypes varied
from resistant to susceptible, as measured by degree of infection 20 days
post infection. Two of the four genotypes susceptible to infection showed
a quadratic (concave downward) relationship between the degree of
infection and shoot length, with maximum shoot length at intermediate
values of infection. This result suggests overcompensation, that is, an
increase in growth in infected individuals. The number of leaves decreased
with increasing degree of infection, but at different rates in the four
susceptible genotypes, indicating genetic variation for tolerance. In the
field, the inoculated genotypes did not show any disease symptoms, but
plant biomass at the end of the growing season was higher for inoculated
plants than for controls, in‐line with the overcompensation detected in
the laboratory. We conclude that in S. dulcamara there are indications of
genetic variation for both resistance and tolerance to P. infestans
infection. Moreover, some genotypes displayed overcompensation. Learning
about plant tolerance and overcompensation to infection by pathogens can
help broaden our understanding of plant defense in natural populations and
help develop more sustainable plant protection strategies for economically
important crop diseases.
Correlations with plant weight in S. dulcamara 20 dpi in the
laboratoryCorrelations between plant weight, total shoot length and number
of leaves at 20 dpi in Solanum dulcamara genotypes infected by
Phytophthora infestans in the laboratory. A subset of plants was used to
test these correlations at one occasion. Plants were infected with high
levels of inoculum.Correlations plant weight_S. dulcamara_Masini et al.
.xlsxResistance to P. infestans in S. dulcamara genotypes in the
laboratoryResistance to Phytophthora infestans in Solanum dulcamara
genotypes evaluated in the laboratory 20 dpi when infected with high and
low levels of inoculum. Experiments were repeated 13 times involving two
batches with three genotypes each. Percent infection was scored at 20 dpi.
Plant traits – total shoot length and number of leaves - were estimated at
0 and 20 dpi. The difference between 0 and 20 dpi was calculated for each
trait and then used to evaluate the relationship between degree of
infection and plant traits as an indication of tolerance.Resistance_S.
dulcamara_Masini et al..xlsxTolerance to P. infestans in susceptible S.
dulcamara genotypes in the laboratoryTolerance to Phytophthora infestans
in susceptible Solanum dulcamara genotypes evaluated in the laboratory 20
dpi when infected with high and low levels of inoculum. Experiments were
repeated 13 times involving two batches with three genotypes each. Two
genotypes per batch were susceptible. Percent infection was scored at 20
dpi. Plant traits – total shoot length and number of leaves - were
estimated at 0 and 20 dpi. The difference between 0 and 20 dpi was
calculated for each trait and then used to evaluate the relationship
between degree of infection and plant traits as an indication of
tolerance.Tolerance_S.dulcamara_susceptible genotypes_Masini et al.
.xlsxField performance in S. dulcamara genotypes in relation to infection
by P. infestansField performance in Solanum dulcamara genotypes infected
with Phytophthora infestans. Plants were grown in six experimental blocks.
Estimated plant traits included the difference in total shoot length and
number of leaves between 0 and 20 dpi, total flower production and plant
weight at harvest.Field data_S. dulcamara_Masini et al..xlsx
South Sweden