Morphogenesis and differentiation in Rhodomicrobium vannielii and other budding and prosthecate bacteria.

Whittenbury, R; Dow, Crawford S.

doi:10.1128/mmbr.41.3.754-808.1977

Cited by 79 publications

(65 citation statements)

References 54 publications

(75 reference statements)

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“…It is considered that an increase in the culture age induces some physiological changes in the parent cell to affect negatively the rate of growth initiation of the parent population. The attachment of the chromosome to the cytoplasmic membrane at the cell growth point is the physio-logical event which controls initiation of DNA replication [11][12][13][14] and thus the rate of the attachment is assumed to be given by the parameter )~.…”

Section: Discussionmentioning

confidence: 99%

Kinetics of microcolony formation of a soil oligotrophic bacterium, Agromonas sp.

Mochizuki

1986

FEMS Microbiology Letters

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The kinetics of budding/dividing of parent cells at different culture ages, spread on a fresh medium, was formulated by the following model Nt = N~ [I -exp{ -?~(t -tr)}] where N t is the number of budding/dividing cells in the parent population at time t, N~ is the expected number of budding/dividing cells at infinite time, ~ is the rate of budding/dividing of parent cells, and t r is the retardation time. The rate of budding/dividing ~. decreased with the increase in the culture age of the parent cell population. INTRODUCTIONIn studies on bacterial ecology, the plate count technique has been a valuable tool for quantitative estimation of the viable cell number in natural environments [1]. However, the number of colonies usually increases continuously over several weeks alad, consequently, it is difficult to estimate the final number of colonies from a single observation.Recently, Hattori [2-4} proposed a kinetic model of colony formation, which was, in form, the same as that of a first order chemical reaction.It was therefore called the first order reaction (FOR) model. The application of plate count data to the FOR model gives three parameters, N~, ~., and t r. The first parameter, N~, is the final colony number which is estimated by the least squares method [5] from 3 or more sets of counting data at various incubation times for the same plate. Therefore, the final colony number can be estimated by using the FOR model with observed data during an incubation of 1 or 2 weeks. The second parameter, ~., is the rate of colony appearance per unit time. The third parameter, t,, is the retardation time, and is considered to be divided into two parts [3,4,6]; the time lag (L) before the parent population initiates cell growth; and the time lapse (G) during which a growing cell produces its visible colony. In the FOR model, the landmark event which determines the value of the parameter ~. for the formation of visible colonies was assumed to be growth initiation of parent cells [2][3][4]. In this study, therefore, we examined this assumption using cells of Agromonas sp. isolated from a paddy soil. Since the organism first produces a bud and then divides, we observed both bud emergence and microcolony formation and discussed their 0168-6496/86/$03.50

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Section: Discussionmentioning

confidence: 99%

Kinetics of microcolony formation of a soil oligotrophic bacterium, Agromonas sp.

Mochizuki

1986

FEMS Microbiology Letters

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“…Yeast extract (1 g. 1-1) was used to enhance colony formation on PM agar plates (PM/YE); it had little effect on growth in liquid. Swarmer-cell synchronies were carried out as described by Whittenbury and Dow [1] and growth measurements were made as in Scott and Dow [8].…”

Section: Organisms and Culture Conditionsmentioning

confidence: 99%

“…tinct cell types that exhibit differences in the rates of macromolecular synthesis (RNA, DNA, protein) and contain cell-specific components [1][2][3][4].…”

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confidence: 99%

“…Changes in rates of polymerase subunit synthesis or in the type o[ o subunit could play an important role in regulating both RNA and protein content in R. vannielii, as they do in other organisms [5][6][7]. To explore the RNA polymerase and its role in regulating RNA and protein synthesis, several different approaches have been used, including probing the cell cycle with growth inhibitors [1] and analysing RNA polymerase activity in toluene-treated cells [9]. This paper discusses another approach used to gain information on the properties of RNA polymerase: the use of temperature stress to influence protein synthesis in rifampicin-resistant mutants of R. vannielii.…”

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confidence: 99%

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The influence of temperature stress on protein synthesis in the Rhodomicrobium vannielii (RM5) and in a rifampicin-resistant mutant R82

Scott

1987

FEMS Microbiology Letters

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“…The cell wall of the budding phototrophic bacterium Rhodomicrobiurn vannielii is of the Gram-negative type [1,2] and contains lipopolysaccharide (LPS) in the outer membrane. It has been shown recently, that the LPS of R. vannielii is lipophilic [3] and, thus, can be obtained by the phenol-chloroform-petroleum ether (PCP) extraction method [4].…”

Section: Introductionmentioning

confidence: 99%

Co-extraction of lipopolysaccharide and an ornithine-containing lipid from Rhodomicrobium vannielii

Holst

1983

FEMS Microbiology Letters

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Morphogenesis and differentiation in Rhodomicrobium vannielii and other budding and prosthecate bacteria.

Cited by 79 publications

References 54 publications

Kinetics of microcolony formation of a soil oligotrophic bacterium, Agromonas sp.

Kinetics of microcolony formation of a soil oligotrophic bacterium, Agromonas sp.

The influence of temperature stress on protein synthesis in the Rhodomicrobium vannielii (RM5) and in a rifampicin-resistant mutant R82

Co-extraction of lipopolysaccharide and an ornithine-containing lipid from Rhodomicrobium vannielii

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