Phenotypic plasticity reconciles incongruous molecular and morphological taxonomies: The giant kelp, macrocystis (laminariales, phaeophyceae), is a monospecific genus

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Demes, K. W., Graham, M. H., & Suskiewicz, T. S. (2009). Phenotypic plasticity reconciles incongruous molecular and morphological taxonomies: The giant kelp, macrocystis (laminariales, phaeophyceae), is a monospecific genus. Journal of Phycology, 45(6), 1266-1269. doi:10.1111/j.1529-8817.2009.00752.x
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TitlePhenotypic plasticity reconciles incongruous molecular and morphological taxonomies: The giant kelp, macrocystis (laminariales, phaeophyceae), is a monospecific genus
AuthorsK. Demes, M. Graham, T. Suskiewicz
AbstractThe giant kelp genus Macrocystis C. Agardh (Laminariales, Phaeophyceae) is one of the world's most ecologically and economically important seaweed taxa, yet its taxonomy remains uncertain. Although the genus currently contains four accepted species based on variable holdfast and blade morphology [M. pyrifera (L.) C. Agardh, M. integrifolia Bory, M. angustifolia Bory, and M. laevis C. H. Hay], numerous recent studies on Macrocystis interfertility, genetic relatedness, and morphological plasticity all suggest that the genus is monospecific. We reviewed this evidence and present an explanation for the extreme phenotypic plasticity that results in morphological variability within Macrocystis, driven by the effects of environmental factors on early development of macroscopic sporophytes. We propose that the genus be collapsed back to a single species, with nomenclatural priority given to M. pyrifera. © 2009 Phycological Society of America.
JournalJournal of Phycology
Date2009
Volume45
Issue6
Start page1266
End page1269
ISSN00223646
SubjectsLaminariales, Macrocystis, Macrocystis angustifolia, Macrocystis integrifolia, Macrocystis laevis, Macrocystis pyrifera, Phaeophyceae
NoteCited By (since 1996):18, CODEN: JPYLA

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