A sex-inducing pheromone triggers cell cycle arrest and mate attraction in the diatom Seminavis robusta

Scientific Reports
Sara MoeysWim Vyverman

Abstract

Although sexual reproduction is believed to play a major role in the high diversification rates and species richness of diatoms, a mechanistic understanding of diatom life cycle control is virtually lacking. Diatom sexual signalling is controlled by a complex, yet largely unknown, pheromone system. Here, a sex-inducing pheromone (SIP(+)) of the benthic pennate diatom Seminavis robusta was identified by comparative metabolomics, subsequently purified, and physicochemically characterized. Transcriptome analysis revealed that SIP(+) triggers the switch from mitosis-to-meiosis in the opposing mating type, coupled with the transcriptional induction of proline biosynthesis genes, and the release of the proline-derived attraction pheromone. The induction of cell cycle arrest by a pheromone, chemically distinct from the one used to attract the opposite mating type, highlights the existence of a sophisticated mechanism to increase chances of mate finding, while keeping the metabolic losses associated with the release of an attraction pheromone to a minimum.

Associated Datasets

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Citations

Sep 14, 2016·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Zena Hadjivasiliou, Andrew Pomiankowski
Mar 23, 2017·The New Phytologist·Marianna VenuleoMario Giordano
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Apr 30, 2021·Journal of Chemical Ecology·Franziska KlapperGeorg Pohnert
Jun 13, 2021·Science Advances·Alexander AndersVictor Sourjik

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Datasets Mentioned

BETA
E-MTAB-4056

Methods Mentioned

BETA
PCR
RNA-seq

Software Mentioned

qbase +
GMAP
BioConductor package edgeR
MarkerLynx
GSNAP
XCMS
R
PSI
Biogazelle
TRAPID

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