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99177C

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Image #   99177C
Name:   Green alga (Haematococcus pluvialis)
Copyright:   Copyright 2004 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Green alga (chlorophyte) vegetative stage (Haematococcus pluvialis). A unicellular, microscopic green alga that has two flagella. It contains a single, cup-shaped chloroplast, with several pyrenoids. This alga occurs in many different aquatic environments including fresh and brackish water. It is believed to be the world's richest known source of astaxanthin. Astaxanthin is a natural carotenoid pigment and a biological antioxidant. When environmental conditions become adverse (i.e. when nutrients start becoming scarce, the water environment starts to dry out and the algae are increasingly exposed to direct sunlight), they enter a resting phase (cyst phase) that allows them to survive for prolonged periods, until the environment becomes much more favorable for growth. In the resting phase the alga accumulates high amounts of astaxanthin. Companies grow Haematococcus and harvest the astaxanthin for commercial antioxidant supplements, as well as a color additive for farm raised salmon.
Magnification*: x600
Type: SEM
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   alga algae antioxidant aquatic astaxanthin brackish water carotenoid carotenoid pigment Chlorophyta chlorophyte cyst phase cyst stage eukaryote flagella flagellum fresh water green alga Haematococcus phytoplankton plankton protista protozoa protozoan resting stage vegetative phase vegetative stage SEM green algae Haematococcus pluvialis 03.01.09 99177C

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