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An Investigation of the Purple Vacuolar Pigment of Zygogonium ericetorum and the Status of "Algal Anthocyanins" and "Phycoporphyrins"

Ralph E. Alston
American Journal of Botany
Vol. 45, No. 9 (Nov., 1958), pp. 688-692
Stable URL: http://www.jstor.org/stable/2439506
Page Count: 5
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
An Investigation of the Purple Vacuolar Pigment of Zygogonium  ericetorum and the Status of "Algal Anthocyanins" and "Phycoporphyrins"
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Abstract

A species of Zygogonium with purple cell sap was collected from a bog in south-central Texas. The response of the purple pigment to ammonium hydroxide and to HCl indicated that it was not an anthocyanin. Some of its properties suggested that it was an iron-tannin complex of some kind. When the pigment was subjected to general tests for tannins this hypothesis was reinforced, and a comparison of its properties with a synthetic "iron-tannin," produced by adding ferric chloride to a solution of gallic acid, showed striking similarity between the two products. If one compares the properties of a pigment described by Lagerheim as "phycoporphyrin," it appears that it too was an iron-tannin. It is recommended that the term "phycoporphyrin," which is apt to suggest a tetra-pyrrol, be abandoned.

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