Xanthomonas campestris pv. asclepiadis, pv. nov., causative agent of bacterial blight of milkweed (Asclepias spp.)

Milkweed (Asclepias spp.) is currently grown in Nebraska as an alternative crop, principally for its floss. Plants with symptoms of leaf blight were observed in commercial milkweed fields and field plots from 1987 to 1993. A yellow-pigmented, gram-negative bacterium was consistently isolated from le...

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Bibliographic Details
Published inPlant disease Vol. 79; no. 11
Main Authors Flynn, P. (Iowa State University, Ames.), Vidaver, A.K
Format Journal Article
LanguageEnglish
Published 01.11.1995
Subjects
ASCLEPIADACEAE
BACTERIOSE
BACTERIOSIS
DEPERISSEMENT
ESPECE
ESPECE NOUVELLE
ESPECIES
ESPECIES NUEVAS
ETIOLOGIA
ETIOLOGIE
HOTE
HUESPEDES
TIZON
XANTHOMONAS CAMPESTRIS
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Summary:Milkweed (Asclepias spp.) is currently grown in Nebraska as an alternative crop, principally for its floss. Plants with symptoms of leaf blight were observed in commercial milkweed fields and field plots from 1987 to 1993. A yellow-pigmented, gram-negative bacterium was consistently isolated from leaves and also from infected or infested seed, stems, roots, and flowers. The pathogen was identified using polypeptide and substrate-utilization profiles, fatty acid and pigment analysis, and growth on a semiselective medium. Host range tests on members of the milkweed family and on plants representing various commercial crops grown in Nebraska showed the pathogenic specificity of the bacterium for five of six Asclepias species tested. The pathogen appears to be a new pathovar of Xanthomonas campestris. The name proposed for this bacterium is Xanthomonas campestris pv. asclepiadis
Bibliography:9567822
H20
ISSN:0191-2917
1943-7692
DOI:10.1094/PD-79-1176