| characteristics of ti plasmids from broad-host-range and ecologically specific biotype 2 and 3 strains of agrobacterium tumefaciens. | agrobacterium tumefaciens strains isolated from crown gall tumors on grapevines in california were consistently of the biotype 3 group. all 11 of these strains were limited in their host range and harbored ti plasmids with molecular masses between 119 and 142 megadaltons (mdal) as well as a larger cryptic plasmid of greater than 200 mdal; occasionally a smaller cryptic plasmid of 65 mdal was also present. ti plasmids o these strains have dna sequences in common with ti plasmids of octopine and n ... | 1982 | 7085561 |
| causal role of xylella fastidiosa in oleander leaf scorch disease. | abstract a lethal leaf scorch disease of oleander (nerium oleander) appeared in southern california in 1993. a bacterium, xylella fastidiosa, was detected by culturing, enzyme-linked immunoassay, and polymerase chain reaction in most symptomatic plants but not in symptomless plants or negative controls. inoculating oleanders mechanically with x. fastidiosa cultures from diseased oleanders caused oleander leaf scorch (ols) disease. the bacterium was reisolated from inoculated plants that became d ... | 1999 | 18944803 |
| inhibition of cellular transformation by berry extracts. | recent studies have examined and demonstrated the potential cancer chemopreventive activity of freeze-dried berries including strawberries and black raspberries. although ellagic acid, an abundant component in these berries, has been shown to inhibit carcinogenesis both in vivo and in vitro, several studies have reported that other compounds in the berries may also contribute to the observed inhibitory effect. in the present study, freeze-dried strawberries (fragara ananassa, fa) or black raspbe ... | 2001 | 11181460 |