Bacteria associated with internal breakdown of onion bulbs and their possible role in disease expression
Article first published online: 5 APR 2007
Volume 35, Issue 3, pages 329–336, September 1986
How to Cite
COTHER, E. J. and DOWLING, V. (1986), Bacteria associated with internal breakdown of onion bulbs and their possible role in disease expression. Plant Pathology, 35: 329–336. doi: 10.1111/j.1365-3059.1986.tb02023.x
- Issue published online: 5 APR 2007
- Article first published online: 5 APR 2007
Bacteria of the genera Pseudomonas. Erwinia. Klebsiella, Enterobacter and Escherichia were isolated from internal swollen leaf bases of naturally infected onion bulbs and were pathogenic to onion tissue on reinoculation. In pathogenicity tests, inoculation of slices from symptomless bulbs with one bacterium or with a sterile needle often resulted in isolation of P. aeruginosa, Serratia marcesvens and Bacillus cereus. It is postulated that the bacteria isolated form part of the endophytic microflora of an onion bulb, and that they may become opportunistic pathogens when changes in host physiology are triggered by high temperatures at bulb maturity.