𝔖 Bobbio Scriptorium
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Heteroxanthin in Euglena gracilis

✍ Scribed by Nitsche, Helfried

Publisher
Springer-Verlag
Year
1973
Weight
269 KB
Volume
90
Category
Article
ISSN
0003-9276

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✦ Synopsis

  1. From a large scale preparation of Euglena gracilis, strain Z, besides the acetylenic pigments diatoxanthin and diadinoxanthin and the allene neoxanthin, an additional acetylenie xanthophyll has been isolated. 2. Mass and II~ spectra and chemical reactions showed typical patterns of heteroxanthin from Vaucheria. 3. The pigment was transformed into diadinochrome-isomers with acidified acetone. 4. A partial synthesis of heteroxanthin from diadinoxanthin by LiA1H~-reduetion is described, confirming the structure proposed by Strain. 5. The identity of heteroxanthin with the trollein--like pigment described for Euglena is discussed.

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## Abstract In phototrophic culture of __Euglena gracilis__, good synchrony was found only under rather restricted programs of light‐dark cycles, and rather narrow ranges of temperature and light intensity, when cultures were flushed with air fortified with adequate amounts of CO~2~. When flushed w