Fusarium oxysporum f. sp. palmarum, a novel forma specialis causing a lethal disease of syagrus romanzoffiana and Washingtonia robusta in Florida

M. L. Elliott, E. A. Des Jardin, K. O'Donnell, David Michael Geiser, N. A. Harrison, T. K. Broschat

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Elliott, M. L., Des Jardin, E. A., O'Donnell, K., Geiser, D. M., Harrison, N. A., and Broschat, T. K. 2010. Fusarium oxysporum f. sp. palmarum, a novel forma specialis causing a lethal disease of Syagrus romanzoffiana and Washingtonia robusta in Florida. Plant Dis. 94:31-38. A new disease of Syagrus romanzoffiana (queen palm) and Washingtonia robusta (Mexican fan palm) has spread across the southern half of Florida during the past 5 years. The initial foliar symptom is a one-sided chlorosis or necrosis of older leaf blades, with a distinct reddish-brown stripe along the petiole and rachis and an associated discoloration of internal tissue. Within 2 to 3 months after onset of symptoms, the entire canopy becomes desiccated and necrotic but the leaves do not droop or hang down around the trunk. Based on pathogenicity and morphological and molecular characterization, the etiological agent has been identified as a new forma specialis of Fusarium oxysporum, designated f. sp. palmarum. Sequence analysis of a portion of the translation elongation factor 1-α gene (EF-1α) separated 27 representative isolates into two EF-1α groups, which differed by two transition mutations. Members of both EF-1α groups are pathogenic on both species of palm. A phylogenetic analysis inferred from partial EF-1α sequences from a genetically diverse set of F. oxysporum isolates, including three other formae speciales pathogenic on palm (i.e., f. sp. albedinis, f. sp. canariensis, and f. sp. elaeidis), suggested that f. sp. palmarum and f. sp. albedinis may be more closely related to one another than either is to the two other palm pathogens.

Original languageEnglish (US)
Pages (from-to)31-38
Number of pages8
JournalPlant disease
Volume94
Issue number1
DOIs
StatePublished - Jan 1 2010

Fingerprint

Washingtonia robusta
Syagrus romanzoffiana
lethal genes
signs and symptoms (plants)
genes
etiological agents
chlorosis
discoloration
Fusarium oxysporum
leaf blade
translation (genetics)
tree trunk
necrosis
pathogenicity
sequence analysis
canopy
mutation
nucleotide sequences
pathogens
phylogeny

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science
  • Plant Science

Cite this

Elliott, M. L. ; Des Jardin, E. A. ; O'Donnell, K. ; Geiser, David Michael ; Harrison, N. A. ; Broschat, T. K. / Fusarium oxysporum f. sp. palmarum, a novel forma specialis causing a lethal disease of syagrus romanzoffiana and Washingtonia robusta in Florida. In: Plant disease. 2010 ; Vol. 94, No. 1. pp. 31-38.
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abstract = "Elliott, M. L., Des Jardin, E. A., O'Donnell, K., Geiser, D. M., Harrison, N. A., and Broschat, T. K. 2010. Fusarium oxysporum f. sp. palmarum, a novel forma specialis causing a lethal disease of Syagrus romanzoffiana and Washingtonia robusta in Florida. Plant Dis. 94:31-38. A new disease of Syagrus romanzoffiana (queen palm) and Washingtonia robusta (Mexican fan palm) has spread across the southern half of Florida during the past 5 years. The initial foliar symptom is a one-sided chlorosis or necrosis of older leaf blades, with a distinct reddish-brown stripe along the petiole and rachis and an associated discoloration of internal tissue. Within 2 to 3 months after onset of symptoms, the entire canopy becomes desiccated and necrotic but the leaves do not droop or hang down around the trunk. Based on pathogenicity and morphological and molecular characterization, the etiological agent has been identified as a new forma specialis of Fusarium oxysporum, designated f. sp. palmarum. Sequence analysis of a portion of the translation elongation factor 1-α gene (EF-1α) separated 27 representative isolates into two EF-1α groups, which differed by two transition mutations. Members of both EF-1α groups are pathogenic on both species of palm. A phylogenetic analysis inferred from partial EF-1α sequences from a genetically diverse set of F. oxysporum isolates, including three other formae speciales pathogenic on palm (i.e., f. sp. albedinis, f. sp. canariensis, and f. sp. elaeidis), suggested that f. sp. palmarum and f. sp. albedinis may be more closely related to one another than either is to the two other palm pathogens.",
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Fusarium oxysporum f. sp. palmarum, a novel forma specialis causing a lethal disease of syagrus romanzoffiana and Washingtonia robusta in Florida. / Elliott, M. L.; Des Jardin, E. A.; O'Donnell, K.; Geiser, David Michael; Harrison, N. A.; Broschat, T. K.

In: Plant disease, Vol. 94, No. 1, 01.01.2010, p. 31-38.

Research output: Contribution to journalArticle

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