A Ralstonia solanacearum Strain from Guatemala Infects Diverse Flower Crops, Including New Asymptomatic Hosts Vinca and Sutera, and Causes Symptoms in Geranium, Mandevilla Vine, and New Host African Daisy (Osteospermum ecklonis)
| Autor: | Tuan Minh Tran, A. M. Bocsanczy, Caitilyn Allen, Margery L. Daughtrey, David J. Norman, Luis C. Mejía, Jordan Weibel |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Ralstonia solanacearum biology Host (biology) food and beverages Wilting Plant Science biochemical phenomena metabolism and nutrition Horticulture biology.organism_classification 01 natural sciences 03 medical and health sciences Cutting 030104 developmental biology Geranium Botany Mandevilla Blight Osteospermum ecklonis 010606 plant biology & botany |
| Zdroj: | Plant Health Progress. 17:114-121 |
| ISSN: | 1535-1025 |
| DOI: | 10.1094/php-rs-16-0001 |
| Popis: | A strain of Ralstonia solanacearum was associated with wilting and blight of flowering ornamentals grown from cuttings that originated in Guatemala. This isolate, UW757, could wilt geranium, Osteospermum spp., and mandevilla, but was more aggressively virulent on tomato. Although it rarely caused symptoms, after inoculation UW757 colonized the stems of 11 widely grown ornamental species, reaching mean populations as high as 109 CFU/g stem at the common tropical highland production temperature of 24°C. UW757 belongs to phylotype I, sequevar 14 of the R. solanacearum species complex, not to the Race 3 biovar 2 Select Agent group that also infects geraniums. Whole genome sequencing revealed that UW757 is closely related to several Asian R. solanacearum strains and also to P781, a mandevilla-infecting strain established in Florida. Strains similar to UW757 were isolated from tomato in Guatemala in 2006 and 2015, indicating that this group is common and persistent. This finding enlarges the known host range of R. solanacearum, which was not previously known to infect Osteospermum, Vinca, or Sutera spp. Growers should be aware that a broad range of ornamental plants, including previously unknown hosts, can be latently infected by non-Race 3 biovar 2 strains of R. solanacearum that are also highly virulent on tomato. Accepted for publication 28 April 2016. Published 26 May 2016. |
| Databáze: | OpenAIRE |
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