ISHS Acta Horticulturae 424: II International Rose Symposium
ANALYSIS OF THE BEHAVIOUR OF VARIOUS ROOTSTOCKS AND BOTANICAL SPECIES OF THE GENUS ROSA TOWARDS AGROBACTERIUM TUMEFACIENS |
| Authors: | S. Reynders-Aloisi, G. Pelloli, A. Bettachini |
| Abstract:
Agrobacterium tumefaciens is the pathogenic agent responsible for crown-gall. This soil disease causes serious damage to the rose trees. That is why a collection of rootstocks and botanical species of the genus Rosa were tested for their behaviour towards Agrobacterium tumefaciens. Distinctive cuttings were rooted in rockwool and inoculated by injury with a strain of Agrobacterium tumefaciens of strong or medium virulence. The controls were only injured. 36 plants by cultivar/strain combination were spread out in a block-plot under controlled conditions. Notations about gall presence/absence, gall size and dimensions of shoots were performed. The results show a great variability in the response to inoculation. Some rootstocks have an interesting behaviour that justifies the setting up of a rootstock selection program. | |
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