Collective electrical oscillations of a diatom population induced by dark stress

Paulo Rocha, Alexandra D. Silva, Lia Godinho, Willem Dane, Pedro Estrela, Lode K J Vandamme, Jose Pereira-Leal, Dago M. De Leeuw, Ricardo B. Leite

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Diatoms are photosynthetic microalgae, a group with a major environmental role on the planet due to the biogeochemical cycling of silica and global fixation of carbon. However, they can evolve into harmful blooms through a resourceful communication mechanism, not yet fully understood. Here, we demonstrate that a population of diatoms under darkness show quasi-periodic electrical oscillations, or intercellular waves. The origin is paracrine signaling, which is a feedback, or survival, mechanism that counteracts changes in the physicochemical environment. The intracellular messenger is related to Ca2+ ions since spatiotemporal changes in their concentration match the characteristics of the intercellular waves. Our conclusion is supported by using a Ca2+ channel inhibitor. The transport of Ca2+ ions through the membrane to the extracellular medium is blocked and the intercellular waves disappear. The translation of microalgae cooperative signaling paves the way for early detection and prevention of harmful blooms and an extensive range of stress-induced alterations in the aquatic ecosystem.
Original languageEnglish
Article number5484 (2018)
Pages (from-to)1-8
Number of pages8
JournalScientific Reports
Issue number1
Early online date3 Apr 2018
Publication statusPublished - 1 Dec 2018

ASJC Scopus subject areas

  • General


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