Lysogenicity in Xanthomonas pruni
نویسندگان
چکیده
منابع مشابه
Regulation of tryptophan pyrrolase activity in Xanthomonas pruni.
Tryptophan pyrrolase was studied in partially purified extracts of Xanthomonas pruni. The dialyzed enzyme required both heme and ascorbate for maximal activity. Other reducing agents were able to substitute for ascorbate. Protoporphyrin competed with heme for the enzyme, suggesting that the native enzyme is a hemoprotein. The enzyme exhibited sigmoid saturation kinetics. Reduced nicotinamide ad...
متن کاملThe niacin-tryptophan relationship in the metabolism of Xanthomonas pruni.
The investigations of Starr (1) demonstrated that Xunthomonas pruni requires an exogenous source of nicotinic acid when grown on a medium containing vitamin-free, acid-hydrolyzed casein, methionine, or glutamic acid to provide an organic form of nitrogen. Preliminary work in this laboratory showed that tryptophan could replace nicotinic acid for growth in a similar medium. This was the first kn...
متن کاملLysogenicity †
In studies on antibiotic susceptibility and resistance carried on in our laboratory"0' "2 l , we have found it advantageous on numerous occasions to employ auxotrophic mutants derived from Escherichia coli, strain K 12, since appropriate resistant mutants could be recombined for further analysis of genetic relationships. The demonstration8"6 that this strain is often lysogenic for a phage X has...
متن کاملLateral flow immunoassay for on-site detection of Xanthomonas arboricola pv. pruni in symptomatic field samples
Xanthomonas arboricola pv. pruni is a quarantine pathogen and the causal agent of the bacterial spot disease of stone fruits and almond, a major threat to Prunus species. Rapid and specific detection methods are essential to improve disease management, and therefore a prototype of a lateral flow immunoassay (LFIA) was designed for the detection of X. arboricola pv. pruni in symptomatic field sa...
متن کاملInfluence of agitation and aeration in xanthan production by Xanthomonas campestris pv pruni strain 101.
Production, viscosity, and chemical composition of xanthan synthesized by bacterium Xanthomonas campestris pv pruni strain 101 were evaluated in bioreactor systems. During the process, the volumetric oxygen mass transfer coefficient (k(L)a) and the biomass were determined and the pH was monitored. The cultures were grown in a 3 I bioreactor, with aeration and agitation varying as follows: condi...
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ژورنال
عنوان ژورنال: Journal of General Microbiology
سال: 1955
ISSN: 0022-1287
DOI: 10.1099/00221287-12-3-402