Control of cell length in Bacillus subtilis.
AUTOR(ES)
Sargent, M G
RESUMO
During inhibition of deoxyribonucleic acid synthesis in Bacillus subtilis 168 Thy-minus Tryp-minus, the rate of length extension is constant. A nutritional shift-up during thymine starvation causes an acceleration in the linear rate of length extension. During a nutritional shift-up in the presence of thymine, the rate of length extension gradually increases, reaching a new steady state at about 50 min before the new steady-state rate of cell division is reached. The steady-state rates of nuclear division and length extension are reached at approximately the same time. The ratio of average cell length to numbers of nuclei per cell in exponential cultures is constant over a fourfold range of growth rates. These observations are consistent with: (i) surface growth zones which operate at a constant rate of length extension under any one growth condition, but which operate at an absolute rate proportional to the growth rate of the culture, (ii) a doubling in number of growth zones at nuclear segregation, and (iii) a requirement for deoxyribonucleic acid replication for the doubling in a number of sites.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=235685Documentos Relacionados
- Generation of linear multigenome-length plasmid molecules in Bacillus subtilis.
- Extracellular control of spore formation in Bacillus subtilis.
- Control of intracellular serine protease expression in Bacillus subtilis.
- Genetic control of the glp system in Bacillus subtilis.
- Cell wall-DNA association in Bacillus subtilis.