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- Title
Infection of roots of <em> Dieffenbachia maculata</em> by the foliar blight and soft rot pathogen, <em>Erwinia chrysanthemi</em>.
- Authors
Nieves-Brun, Carmen
- Abstract
Erwinia chrysanthemi, the organism causing foliage, blight, leaf spotting, basal stem rot and root rot of Dieffenbachia muculata, was shown to be capable of infecting via roots. Inoculated plants were sectioned and internal spread of the pathogen determined by 'sandwich' plating between two layers of Miller's selective medium. Light microscopy and SEM confirmed that the pathogen was present throughout the plant in the xylem. Resin ducts, previously claimed as being the route for systemic infection, were not found. Initially confined to the xylem, the pathogen spread intercellarly to the neighbouring parenchyma and, after about 8 days, pockets of infection, often surrounded by periderm-like tissues, were seen.
- Subjects
DIEFFENBACHIA; ERWINIA; ROOT rots; XYLEM; PHYTOPATHOGENIC microorganisms; PLANT diseases; PLANT parenchyma
- Publication
Plant Pathology, 1985, Vol 34, Issue 1, p139
- ISSN
0032-0862
- Publication type
Article
- DOI
10.1111/j.1365-3059.1985.tb02770.x