PHOTOSYNTHETIC PIGMENT AND GENETIC DIFFERENCES BETWEEN TWO SOUTHERN OCEAN MORPHOTYPES OF EMILIANIA HUXLEYI (HAPTOPHYTA)

The widespread coccolithophorid Emiliania huxleyi (Lohmann) W. W. Hay et H. Mohler plays a pivotal role in the carbon pump and is known to exhibit significant morphological, genetic, and physiological diversity. In this study, we compared photosynthetic pigments and morphology of triplicate strains...

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Bibliographic Details
Published in:Journal of phycology 2011-06, Vol.47 (3), p.615-626
Main Authors: Cook, Suellen S, Whittock, Lucy, Wright, Simon W, Hallegraeff, Gustaaf M
Format: Article
Language:English
Subjects:
alleles
carbon
carotenoids
Coccolithus huxleyi
Emiliania huxleyi
Haptophyta
pigments
sequence analysis
single nucleotide polymorphism
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Summary:The widespread coccolithophorid Emiliania huxleyi (Lohmann) W. W. Hay et H. Mohler plays a pivotal role in the carbon pump and is known to exhibit significant morphological, genetic, and physiological diversity. In this study, we compared photosynthetic pigments and morphology of triplicate strains of Southern Ocean types A and B/C. The two morphotypes differed in width of coccolith distal shield elements (0.11-0.24 μm, type A; 0.06-0.12 μm, type B/C) and morphology of distal shield central area (grill of curved rods in type A; thin plain plate in type B/C) and showed differences in carotenoid composition. The mean 19′-hexanoyloxyfucoxanthin (Hex):chl a ratio in type B/C was >1, whereas the type A ratio was
ISSN:0022-3646
1529-8817
DOI:10.1111/j.1529-8817.2011.00992.x