The cell content and secretion of water-soluble vitamins by several freshwater algae

Abstract

Three green algae, Chlamydomonas reinhardii, Chlorella vulgaris and Scenedesmus obliquus, and one blue-green alga, Anabaena cyclindrica, were grown in chemically defined media. All the algae examined contained folates, beta-carotene and vitamins C and E; several of the B-vitamins and vitamin A were found in varying amounts in some but not in all the algae examined. All the green algae secreted significant amounts of folate and biotin and all but Scenedesmus secreted pantothenate into their growth medium; Anabaena secreted folate and pantothenate.

Potential use of the astaxanthin-producing microalga, Monoraphidium sp. GK12, as a functional aquafeed for prawns

“…Furthermore, feed-G also contained chlorophyll derived from GK12 cells, which may have repressed AXA photodegradation. Kobayashi et al (1991) b Lorenz (1999) c Aaronson et al (1977) d Kay (1991) e Becker (1994) f Fabregas & Herrero (1990) g Thomasa et al (1984) h Annapurna et al (1991) Lorenz (1999) b Becker (1994) Feeds-S and -H did not contain constituents such as β-carotene or chlorophyll, and AXA might therefore have been degraded more easily, causing significant loss of AXA in these feeds. Since a bioavailability of AXA increases when it is mixed with oil (Clark et al 2000), the high lipid content of GK12 cells may contribute to the efficient ingestion of AXA by animals.…”

Organic matter characterization in Barents Sea and eastern Arctic Ocean during summer

“…The detected DOC concentrations (Table 2) Folic acid is found in seawater and could be regarded as biomarker compound as it is a product of metabolism of some microorganisms (green algae and cyanobacteria) (Aaronson et al, 1977;Plavšić et al, 2002), while other microorganisms e.g. the diatom Phaeodactylum tricornutum (Plavšić et al, 1997) are FA consumers.…”

Organic matter characterization and fate in the sub-arctic Norwegian fjords during the late spring/summer period

“…This result implies POM fractionation during remineralization in fjord waters (Shaffer, Bendtsen, & Ulloa, 1999) Folic acid (FA) is widely spread in seawater as it is produced there by some microorganisms. Up to now it is known that FA producers are green algae and cyanobacteria (Aaronson et al, 1977;Plavšić, Terzić, Ahel, & van den Berg, 2002). FA could be regarded as biomarker for these phytoplankton species.…”