GROWTH YIELD OF AN ORANGE-COLORED STREPTOCOCCUS BOVIS NO. 148

[摘要] The growth yield of orange-colored Streptococcus bovis No. 148 isolated from bovine rumen was investigated. The high growth yield of S. bovis occurred in the presence of CO2 under batch culture conditions, and the maximum value for YATP (the gram dry weight of organism produced per mol of ATP) was about 18. The growth yield was decreased by the addition of NaHCO3 or Na2CO3 which are commonly used as neutralizing agents for the culture of ordinary rumen bacteria. The growth-promoting effect of CO2 could be partially replaced by some unsaturated fatty acids and oleate-containing compounds. It is suggested that lipid synthesis from CO2 may be a rate-limiting step in the growth of S. bovis.

[学科分类] 微生物学和免疫学