TY - JOUR T1 - Tumor Formation by <em>Agrobacterium tumefaciens</em> Is Suppressed by <em>Agrobacterium radiobacter</em> HLB-2 on Grape Plants JF - American Journal of Enology and Viticulture JO - Am J Enol Vitic. SP - 249 LP - 254 DO - 10.5344/ajev.1993.44.3.249 VL - 44 IS - 3 AU - XIN-AN PU AU - R. N. GOODMAN Y1 - 1993/01/01 UR - http://www.ajevonline.org/content/44/3/249.abstract N2 - 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. ER -