TABLE 1.
Biochemical characteristics and pathogenicity of the Xanthomonas strains investigated in this studya
| Strain | Pectolytic activity | Amylolytic activity | Utilization of: |
Virulence on: |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Raffinose | Mannitol | Barley | Common bean | Cucumber | Maize | Melon | Squash | Sunflower | Tomato | Watermelon | Wheat | Tobacco | Geranium | |||
| Xanthomonas sp. strain FX1 | +b | + | − | + | − | − | − | − | * | * | − | * | − | − | * | * |
| Xanthomonas sp. strain FX2 | + | + | − | + | − | − | − | − | * | * | − | * | − | − | * | * |
| Xanthomonas sp. strain FX3 | + | + | − | + | − | − | − | − | * | * | − | * | − | − | * | * |
| Xanthomonas sp. strain FX4 | + | + | − | + | − | − | − | − | * | * | − | * | − | − | * | * |
| Xanthomonas sp. strain AmX2 | + | + | − | + | − | − | − | − | * | * | − | * | − | − | * | * |
| X. translucens pv. translucens ICMP 5752T | − | + | + | + | + | ND | ND | ND | ND | * | ND | * | ND | − | ND | ND |
| X. translucens pv. undulosa ICMP 11055 | − | + | + | + | + | ND | ND | ND | ND | ND | ND | ND | ND | + | ND | ND |
| X. arboricola pv. pruni ICMP 17186 | − | + | + | − | ND | ND | ND | ND | ND | ND | ND | + | ND | ND | + | + |
| X. arboricola pv. juglandis CFPB 8608 | − | + | + | − | ND | ND | ND | ND | ND | ND | ND | + | ND | ND | + | + |
| X. citri subsp. citri SU261 | − | + | + | + | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND |
| X. euvesicatoria pv. euvesicatoria ICMP 22075 | − | − | + | + | ND | ND | − | ND | ND | ND | ND | + | ND | ND | ND | ND |
| X. gardneri ICMP 16689 | − | − | + | + | ND | ND | − | ND | ND | ND | ND | + | ND | ND | ND | ND |
| X alfalfae subsp. alfalfa Xa119 | − | + | + | + | ND | + | ND | ND | ND | ND | ND | − | ND | ND | + | ND |
a
ND, not determined; *, induced an HR on these plants.
b
+, indicates positive; −, indicates negative results.