{"title":"Denitrifying and photoheterotrophic growth of Rhodobacter sphaeroides S under anaerobic-dark and -light conditions","authors":"Ken Sasaki , Hiroyuki Morii , Yoshinori Nishizawa , Shiro Nagai","doi":"10.1016/0385-6380(88)90125-2","DOIUrl":null,"url":null,"abstract":"<div><p>Denitrifying growth characteristics of <em>Rhodobacter shaeroides</em> S were examined in batch and continuous cultures under anaerobic-dark and -light conditions. Growth yield based on the electron equivalent, <em>Y</em><sub>eq.</sub>, in anaerobic-dark conditions was 2–3 times lower than that in aerobic-dark conditions (aerobic-heterotropic growth). Under anaerobic-light conditions, denitrifying growth was observed with photosynthetic growth, but decreased with the increase of light intensity. The value of <em>Y</em><sub>eq.</sub> in anaerobic-light conditions increased with the increase of light intensity. This phenomenon could be explained as the change of the fraction of cell mass grown by denitrification and photosynthesis in the total cell mass from the energetic analysis.</p></div>","PeriodicalId":15702,"journal":{"name":"Journal of Fermentation Technology","volume":"66 1","pages":"Pages 27-32"},"PeriodicalIF":0.0000,"publicationDate":"1988-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0385-6380(88)90125-2","citationCount":"15","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Fermentation Technology","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0385638088901252","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 15
Abstract
Denitrifying growth characteristics of Rhodobacter shaeroides S were examined in batch and continuous cultures under anaerobic-dark and -light conditions. Growth yield based on the electron equivalent, Yeq., in anaerobic-dark conditions was 2–3 times lower than that in aerobic-dark conditions (aerobic-heterotropic growth). Under anaerobic-light conditions, denitrifying growth was observed with photosynthetic growth, but decreased with the increase of light intensity. The value of Yeq. in anaerobic-light conditions increased with the increase of light intensity. This phenomenon could be explained as the change of the fraction of cell mass grown by denitrification and photosynthesis in the total cell mass from the energetic analysis.
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