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PLANT PHYSIOLOGY , Vol 103, Issue 2 485-491, Copyright © 1993 by American Society of Plant Biologists

ENVIRONMENTAL AND STRESS PHYSIOLOGY

Floridoside, L-Isofloridoside, and D-Isofloridoside in the Red Alga Porphyra columbina (Seasonal and Osmotic Effects)

U. Karsten, K. D. Barrow and R. J. King
School of Biological Science (U.K., R.J.K.) and School of Biochemistry and Molecular Genetics (K.D.B.), University of New South Wales, Kensington 2033, Australia

The quantitative heteroside distribution in Porphyra columbina Montagne and Bangia atropurpurea (Roth) C. Agardh (Bangiales, Rhodophyta) has been measured using 13C-nuclear magnetic resonance spectroscopy and gas-liquid chromatography. In P. columbina, floridoside and both D- and L-isofloridoside were recorded, with concentrations of L-isofloridoside exceeding those of floridoside. All three compounds were also measured in B. atropurpurea. Marked changes in the relative amounts of the heterosides were recorded throughout the season. The role of L-isofloridoside in the osmotic acclimation of P. columbina has been demonstrated.


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G. Barbier, C. Oesterhelt, M. D. Larson, R. G. Halgren, C. Wilkerson, R. M. Garavito, C. Benning, and A. P.M. Weber
Comparative Genomics of Two Closely Related Unicellular Thermo-Acidophilic Red Algae, Galdieria sulphuraria and Cyanidioschyzon merolae, Reveals the Molecular Basis of the Metabolic Flexibility of Galdieria sulphuraria and Significant Differences in Carbohydrate Metabolism of Both Algae
Plant Physiology, February 1, 2005; 137(2): 460 - 474.
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Copyright © 1993 by the American Society of Plant Biologists