A GENETIC MARKER TO SEPARATEEMILIANIA HUXLEYI(PRYMNESIOPHYCEAE) MORPHOTYPES1

Declan C. Schroeder*, Gaia F. Biggi, Matthew Hall, Joanne Davy, JM Martínez, Anthony J. Richardson, Gillian Malin, William H. Wilson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

<jats:p><jats:italic>Emiliania huxleyi</jats:italic>(Lohm.) Hay and Mohler is a ubiquitous unicellular marine alga surrounded by an elaborate covering of calcite platelets called coccoliths. It is an important primary producer involved in oceanic biogeochemistry and climate regulation. Currently,<jats:italic>E. huxleyi</jats:italic>is separated into five morphotypes based on morphometric, physiological, biochemical, and immunological differences. However, a genetic marker has yet to be found to characterize these morphotypes. With the use of sequence analysis and denaturing gradient gel electrophoresis, we discovered a genetic marker that correlates significantly with the separation of the most widely recognized A and B morphotypes. Furthermore, we reveal that the A morphotype is composed of a number of distinct genotypes. This marker lies within the 3′ untranslated region of a coccolith associated protein mRNA, which is implicated in regulating coccolith calcification. Consequently, we tentatively termed this marker the coccolith morphology motif.</jats:p>
Original languageEnglish
Pages (from-to)874-879
Number of pages0
JournalJournal of Phycology
Volume41
Issue number4
DOIs
Publication statusPublished - Aug 2005

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