Research article2014Peer reviewedOpen access
Directional Auxin Transport Mechanisms in Early Diverging Land Plants
Viaene, Tom; Landberg, Katarina; Thelander, Mattias; Medvecka, Eva; Pederson, Eric; Feraru, Elena; Cooper, Endymion D.; Sundberg, Eva; Ljung, Karin; Friml, Jiří
Abstract
The emergence and radiation of multicellular land plants was driven by crucial innovations to their body plans [1]. The directional transport of the phytohormone auxin represents a key, plant-specific mechanism for polarization and patterning in complex seed plants [2-5]. Here, we show that already in the early diverging land plant lineage, as exemplified by the moss Physcomitrella patens, auxin transport by PIN transporters is operational and diversified into ER-localized and plasma membrane-localized PIN proteins. Gain-of-function and loss-of-function analyses revealed that PIN-dependent intercellular auxin transport in Physcomitrella mediates crucial developmental transitions in tip-growing filaments and waves of polarization and differentiation in leaf-like structures. Plasma membrane PIN proteins localize in a polar manner to the tips of moss filaments, revealing an unexpected relation between polarization mechanisms in moss tip-growing cells and multicellular tissues of seed plants. Our results trace the origins of polarization and auxin-mediated patterning mechanisms and highlight the crucial role of polarized auxin transport during the evolution of multicellular land plants.
Published in
Current Biology
2014, volume: 24, number: 23, pages: 2786-2791
Publisher: CELL PRESS
SLU Authors
Landberg, Katarina
- Department of Plant Biology, Swedish University of Agricultural Sciences
- Department of Plant Biology, Swedish University of Agricultural Sciences
Thelander, Mattias
- Department of Plant Biology, Swedish University of Agricultural Sciences
- Department of Plant Biology, Swedish University of Agricultural Sciences
Pederson, Eric
- Department of Plant Biology, Swedish University of Agricultural Sciences
- Department of Plant Biology, Swedish University of Agricultural Sciences
Sundberg, Eva
- Department of Plant Biology, Swedish University of Agricultural Sciences
- Department of Plant Biology, Swedish University of Agricultural Sciences
Ljung, Karin
- Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences
- Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences
UKÄ Subject classification
Evolutionary Biology
Developmental Biology
Publication identifier
- DOI: https://doi.org/10.1016/j.cub.2014.09.056
Permanent link to this page (URI)
https://res.slu.se/id/publ/66841