Influence of Calcium and Manganese on Dechaining of Lactobacillus bulgaricus†
AUTOR(ES)
Wright, Catherine T.
RESUMO
The events responsible for the transition of Lactobacillus bulgaricus 1243-F from long filamentous chains to short bacilloid rods were examined in a cation-depleted liquid medium. In the presence of magnesium only, cells grew as long chains of unseparated cells. The addition of 100 μM to 1 mM calcium or manganese to this medium resulted in the dechaining of these cells to short bacilloid rods. Fe2+, Zn2+, Co2+, and Cu2+ failed to induce dechaining. Induction of calcium and manganese dechaining functioned under controlled pH maintained at 5.0 and 6.0 but not at pH 7.0. This was consistent with a previous report showing failure in synthesis of dechaining enzymes by L. bulgaricus under pH conditions approaching alkalinity (S. K. Rhee and M. Y. Pack, J. Bacteriol. 144:865-868, 1980). We conclude that under pH conditions which permit synthesis of dechaining enzymes, calcium and manganese are necessary for dechaining activity.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=239468Documentos Relacionados
- Influence of Calcium and Magnesium on Manganese Absorption 1
- Studies on Lactobacillus acidophilus and Lactobacillus bulgaricus: II. Electrophoresis Studies
- Comparative Study of Lactobacillus acidophilus and Lactobacillus bulgaricus
- THE INHIBITING EFFECT OF STREPTOCOCCUS LACTIS ON LACTOBACILLUS BULGARICUS
- BIOAUTOGRAPHIC STUDIES ON THE LACTOBACILLUS BULGARICUS FACTORS1
