Abstract
Agrobacterium radiobacter HLB-2 inhibits Agrobacterium tumefaciens in vitro and tumor development on grape stem explants. The suppression of tumor formation was more effective when HLB-2 was inoculated either prior to a virulent strain or simultaneously, and at a higher cell concentration. Grape explants were transformed 0 to 48 hours after wounding (conditioning). Both A. radiobacter strains HLB-2 and K84, and A. tumefaciens strains are able to multiply similarly in grape explants. The ability of HLB-2 to suppress tumors does not appear to be merely a result of competition for nutrients.
- Received July 1992.
- Copyright 1993 by the American Society for Enology and Viticulture