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Published on: May 14, 2020
PIN-driven auxin transport emerged early in streptophyte evolution
Roman Skokan1,2, Eva Medvecká3, Tom Viaene4
1Department of Experimental Plant Biology, Faculty of Science, Charles University, Prague, Czech Republic.
Abstract:
PIN-FORMED (PIN) transporters mediate directional, intercellular movement of the phytohormone auxin in land plants. To elucidate the evolutionary origins of this developmentally crucial mechanism, we analysed the single PIN homologue of a simple green alga Klebsormidium flaccidum. KfPIN functions as a plasma membrane-localized auxin exporter in land plants and heterologous models. While its role in algae remains unclear, PIN-driven auxin export is probably an ancient and conserved trait within streptophytes.
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