Development of Aster Yellows on Crop and Noncrop Species from the Canadian Prairies
Date
2023-04-03
Authors
Romero, Berenice
Dumonceaux, Tim
Olivier, Chrystel
Wist, Tyler
Prager, Sean
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The American Phytopathological Society
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Abstract
Aster yellows phytoplasmas (AYp) are a group of obligate parasites that infect
a wide range of plant species, including crops such as canola and cereals and
noncrops such as dandelion and wild mustard. In the Canadian Prairies, these
microorganisms are mainly transmitted by a migratory species of leafhopper
(Macrosteles quadrilineatus Forbes). Although a low incidence of the disease
associated with this pathogen has been reported for most years in canola fields,
several outbreaks have been documented in this region. A selection of crop
and noncrop species commonly found in the Canadian Prairies and Arabidopsis
thaliana were used to assess the suitability of these plant species as hosts for
AYp (16SrI-B). Symptom expression and phytoplasma levels were examined at
different time points following exposure to infective insects.A. thaliana,barley,and
canola were susceptible to infection with AYp,yet symptoms differed among these
plant species. A. thaliana and canola exhibited symptoms of infection as early as
2 weeks following exposure to infected insects,whereas symptoms in barley were
observed at 5 weeks. A lower incidence rate was observed in wheat, and levels
of AYp in phytoplasma-infected wheat plants were low.Dandelion and sowthistle
tested negative for the presence of AYp at all time points, suggesting that these
are unsuitable hosts for these microorganisms. Moreover, we observed a partial
disassociation between the plant species that were suitable hosts for AYp and
those that had been characterized as more suitable or suitable hosts for aster
leafhopper oviposition and nymphal development in previous studies.
Description
Keywords
Aster yellows, Disease development, Macrosteles quadrilineatus, Phytoplasmas, Pathogen-host interaction
Citation
Romero, B., Dumonceaux, T., Olivier, C., Wist, T., & Prager, S. M. (2023). Development of Aster Yellows on crop and non-crop species from the Canadian Prairies, Phytofrontiers. https://doi.org/10.1094/PHYTOFR-01-23-0008-R
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DOI
10.1094/PHYTOFR-01-23-0008-R