Crown gall of walnut (Juglans sp.), caused by the bacterium Agrobacterium tumefaciens, greatly impacts the CA walnut industry. To determine the genetic diversity of A. tumefaciens throughout the Central Valley of CA, we collected isolates from 12 walnut growing counties. A total of 340 A. tumefaciens biovar 1 isolates were collected and tested for the presence of the Ti plasmid by PCR; 267 isol...

Rabbits were injected with cell walls obtained from crown-gall tumor tissue or the corresponding cell walls from normal potato tissue. The serum obtained from rabbits 53 days after they were injected with tumor cell walls contained immunoglobins that reacted with both tumor and normal cell walls as well as with the cells from the inciting strain of Agrobacterium tumefaciens. When this serum was...

nant animal cells are distinguished from healthy or inflaznmstory cells. In emphasizing the perma nency of the cellular alteration, Kidd (6) states that “Cancercells remain such until they die . . they never turn back en masse towards the benign or normal state. . . .“The inability to accomplish a reversal of malignant to normal cells under con trolled conditions has, however, served as a s...

Crown gall of walnut (Juglans sp.), caused by the bacterium Agrobacterium tumefaciens, greatly impacts the CA walnut industry. To determine the genetic diversity of A. tumefaciens throughout the Central Valley of CA, we collected isolates from ten walnut growing counties. A total of 340 A. tumefaciens biovar 1 isolates were collected and tested for the presence of the Ti plasmid by PCR; 190 iso...

Cross-reacting antigens were found in bacteria-free crown gall tumor tissue tested with serum prepared against Agrobacterium tumefaciens (Smith and Towns.) Conn., but no such antigens were detected in callus tissue. Soluble proteins from tumor tissue, callus tissue, and the crown gall bacteria were fractionated on a DEAE-Sephadex (A-50) column. The diethylaminoethyl-Sephadex elution profile for...

Several years ago, Robison and Robison (5) reported the synthesis of some compounds of biological interest. Among these were 7-aza-indole-3-acetic acid (AIAA) and 7-aza-indole-3-propionic acid (AIPA), aza analogues of indole-3-acetic acid (IAA), and indole-3-propionic acid (IPA). It was apparent that such compounds might be anti-metabolites of auxin, in the same manner that azaguanine has prove...

objective: methanol extract of bran and unpolished grain of two traditional aromatic rice genotypes viz. kalijira and chinigura were assayed for their activity on the growth and initiation of crown-gall tumors on potato disks. materials and methods: three agrobacterium tumefaciens (a. tumefaciens) strain atsl0105, atta0112, and atac0114 were used as the tumor forming agent. collected rice was s...

Crown gall, caused by Agrobacterium tumefaciens (syn. Rhizobium radiobacter), is characterized gall formation on crowns, stems or roots many plant species. We describe the occurrence of this disease for first time cannabis (Cannabis sativa L. marijuana) plants in two licenced production facilities British Columbia. Galls were observed and several genotypes, including ‘White Rhino’, ‘Pink Kush’ ...