Abstract
The requirement for thiamine was examined in eleven marine protists of littoral, supra-littoral or neritic origin. Six were found to have an absolute requirement for the vitamin. The thiamine-requiring Chrysophyta responded to the pyrimidine half of the vitamin, whereas the two thiamine-requiring Pyrrophyta responded to the thiazole half. All the species requiring thiamine were auxotrophic with respect to at least one other factor (usually vitamin B12). For half-maximal growth, species responding to pyrimidine required 100–300 mμg/1. pyrimidine or thiamine and species responding to thiazole 2000 mμg/1. thiazole or thiamine.
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Publication Info
- Year
- 1958
- Type
- article
- Volume
- 37
- Issue
- 2
- Pages
- 323-329
- Citations
- 66
- Access
- Closed
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Identifiers
- DOI
- 10.1017/s0025315400023729