Pseudomonas viridiflava Causing Necrotic Leaf Spots and Defoliation on Hebe spp. in Northern Spain
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چکیده
منابع مشابه
Identification and Characterization of Pseudocercospora pyricola Causing Leaf Spots on Aronia melanocarpa
Leaf spot disease on black chokeberry (Aronia melanocarpa) was observed at several locations in Korea during 2014-2015. Leaf spots were distinct, scattered over the leaf surface and along the leaf border, subcircular to irregular and brown surrounded by a distinct dark color, and were expanded and coalesced into irregularly shaped lesions. Severely infected leaves became dry and fell off eventu...
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During searches for pathogens to be used as classical biocontrol agents for Miconia calvescens (velvet tree), a devastating plant invader of Hawaii and French Polynesia, damaging angular leaf spots were found repeatedly. The etiological agent of this disease was identified as the nematode Ditylenchus drepanocercus. This nematode has a distinctive falciform appendage at the apex of the tail on b...
متن کاملIdentification of an emergent and atypical Pseudomonas viridiflava lineage causing bacteriosis in plants of agronomic importance in a Spanish region.
Pseudomonas strains with an atypical LOPAT profile (where LOPAT is a series of determinative tests: L, levan production; O, oxidase production; P, pectinolitic activity; A, arginine dihydrolase production; and T, tobacco hypersensibility) can be regarded as emergent pathogens in the Principality of Asturias (Spain), where they have been causing, since 1999, severe damage in at least three taxon...
متن کاملMolecular evolution of pathogenicity-island genes in Pseudomonas viridiflava.
The bacterial pathogen Pseudomonas viridiflava possesses two pathogenicity islands (PAIs) that share many gene homologs, but are structurally and phenotypically differentiated (T-PAI and S-PAI). These PAIs are paralogous, but only one is present in each isolate. While this dual presence/absence polymorphism has been shown to be maintained by balancing selection, little is known about the molecu...
متن کاملOn Some Mutants for Physiological Leaf Spots
Nine of the physiological leaf spot mutants were described and investigated linkage relation with marker genes. All of them were governed by single recessive genes respectively and the causal genes were designated as a series of spl (spotted leaves) as spl,, spl,......sf&. With eight of them except for sPZ~, the linkage groups were determined as follows: sj+-a linkage group corresponding to A t...
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ژورنال
عنوان ژورنال: Plant Disease
سال: 2006
ISSN: 0191-2917,1943-7692
DOI: 10.1094/pd-90-0830a