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Infection by Peronospora somniferi and Peronospora meconopsidis from soil causing downy mildew of opium poppy
Citation
Krishnamoorthy, K and Thangavel, T and Jones, S and Scott, J and Wilson, C, Infection by Peronospora somniferi and Peronospora meconopsidis from soil causing downy mildew of opium poppy, Proceedings of the 10th Australasian Soilborne Diseases Symposium, 4-7 September 2018, Adelaide, South Australia, pp. 1-2. (2018) [Conference Extract]
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Abstract
Downy mildew of opium poppy in Australia is caused by the obligate, oomycete pathogens Peronospora somniferi or Peronospora meconopsidis. Infections from the two pathogens lead to distinct disease symptoms; P. somniferi producing systemically infected plants that are stunted and chlorotic with profuse sporulation on foliage, whilst P. meconopsidis induced angular necrotic localized lesions with sparse sporulation. Plant infections from air-borne conidia, oospores and contaminated seed have been demonstrated. It is suspected that soil-borne inoculum may also provide important inoculum source but little is known about the process of soil-borne infection for the two species. The present study investigates the infection of poppy seedlings by the two pathogens from infested soil inoculum sources and examines subsequent pathogen spread within infected plants and disease development.
Item Details
| Item Type: | Conference Extract |
|---|---|
| Keywords: | opium poppy, downy mildew, Peronospora |
| Research Division: | Biological Sciences |
| Research Group: | Plant Biology |
| Research Field: | Plant Pathology |
| Objective Division: | Plant Production and Plant Primary Products |
| Objective Group: | Industrial Crops |
| Objective Field: | Plant Extract Crops (e.g. Pyrethrum, Jojoba) |
| UTAS Author: | Krishnamoorthy, K (Mrs Krithika Krishnamoorthy) |
| UTAS Author: | Thangavel, T (Dr Tamil Thangavel) |
| UTAS Author: | Jones, S (Dr Suzie Jones) |
| UTAS Author: | Scott, J (Dr Jason Scott) |
| UTAS Author: | Wilson, C (Professor Calum Wilson) |
| ID Code: | 128984 |
| Year Published: | 2018 |
| Deposited By: | TIA - Research Institute |
| Deposited On: | 2018-10-30 |
| Last Modified: | 2018-10-31 |
| Downloads: | 0 |
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