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231225s2003 xx |||||o 00| ||eng c |
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|a 10.1094/PDIS.2003.87.2.193
|2 doi
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|a DE-627
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|a eng
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| 100 |
1 |
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|a Norman, D J
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Characterization of Erwinia Populations from Nursery Retention Ponds and Lakes Infecting Ornamental Plants in Florida
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|c 2003
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| 336 |
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Revised 20.11.2019
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a Water shortages in Florida are occurring due to intense utilization of the aquifer system by municipalities and agriculture, and because of continued deficits in annual rainfall. Water districts therefore, are, recommending the use of recycled irrigation water, stormwater runoff, reclaimed municipal sewage water, and lakes for agricultural use. With recycled water, however, there is potential for both introducing and concentrating plant pathogens. In Florida, Erwinia soft-rot bacteria (synonym Pectobacterium) cause extensive crop losses in ornamental plant production. To determine Erwinia spp. population levels, samples were taken monthly for 1 year from four hypereutropic lakes and eight nursery retention ponds. Seventy-seven Erwinia strains were collected by both direct plating and by an enrichment process. With the direct plating method, 0 to 29 CFU/ml were detected on sodium polypectate medium. Significantly higher populations of Erwinia were detected in retention ponds of nurseries that were actively reutilizing their water. Erwinia strains were identified to species by fatty acid analysis and biochemical tests. Strains were further characterized by repetitive element-polymerase chain reaction (rep-PCR) and compared with 120 strains of Erwinia collected from ornamentals over a 17-year period in Florida. Using rep-PCR, most strains were clustered into two heterogeneous populations of E. chrysanthemi and E. carotovora subsp. carotovora in a 1:2 and a 1:4 ratio for isolates from ornamentals and from water, respectively. Within each population of E. chrysanthemi and E. carotovora, genetically different subpopulations could be identified that contained high percentages of Erwinia strains from water sources. Even though genetic differences exist, 99% of the strains from water sources were found to be pathogenic on dieffenbachia. Without water treatment of irrigation and stormwater runoff, there is a potential for both introducing and concentrating Erwinia populations within these water sources
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|a Journal Article
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| 650 |
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4 |
|a FAME
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| 650 |
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4 |
|a ornamental foliage
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| 650 |
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4 |
|a soft rots
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| 700 |
1 |
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|a Yuen, J M F
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Resendiz, R
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Boswell, J
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Plant disease
|d 1997
|g 87(2003), 2 vom: 20. Feb., Seite 193-196
|w (DE-627)NLM098181742
|x 0191-2917
|7 nnns
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| 773 |
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|g volume:87
|g year:2003
|g number:2
|g day:20
|g month:02
|g pages:193-196
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| 856 |
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|u http://dx.doi.org/10.1094/PDIS.2003.87.2.193
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