TABLE 1.
Results of pathogenicity tests and host range assays of the type strains of Clavibacter michiganensis subsp. phaseoli and C. michiganensis subsp. chilensis, as well as two atypical peach-colored Clavibacter sp. strains, on different annual crops under greenhouse conditionsa
| Taxon | Strain | Pathogenicityb
on: |
|||||||
|---|---|---|---|---|---|---|---|---|---|
| Pepper |
Common bean |
Cowpea | Mung bean | Tomato | |||||
| cv. Sereno | cv. Aziz | cv. Red kidney | cv. Pinto | cv. Navy | |||||
| C. michiganensis subsp. phaseoli | CFBP 8627T | − | − | − | − | − | − | − | − |
| C. michiganensis subsp. chilensis | CFBP 8217T | − | − | − | − | − | − | − | − |
| Clavibacter sp. | CFBP 8615 | − | − | − | − | − | − | − | − |
| Clavibacter sp. | CFBP 8616 | − | − | − | − | −c | − | − | − |
| C. michiganensis sensu stricto | ICMP 22049 | +d | +d | − | − | − | − | − | + |
a
None of the evaluated bacterial strains was pathogenic on the tested plants, while the nonpathogenic strain CFBP 8616 was reisolated from common bean cv. Navy tissues.
b
−, negative; +, positive.
c
The inoculated bacterial strain was reisolated from the asymptomatic leaf tissues of the test plants.
d
These plants showed only stem canker symptoms on the site of inoculation, with no systemic wilting and plant death.