Interaction between Meristem Tissue Layers Controls Phyllotaxis
Data(s) |
30/09/2013
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Resumo |
Phyllotaxis and vein formation are among the most conspicuous patterning processes in plants. The expression and polarization of the auxin efflux carrier PIN1 is the earliest marker for both processes, with mathematical models indicating that PIN1 can respond to auxin gradients and/or auxin flux. Here, we use cell-layer-specific PIN1 knockouts and partial complementation of auxin transport mutants to examine the interaction between phyllotactic patterning, which occurs primarily in the L1 surface layer of the meristem, and midvein specification in the inner tissues. We show that PIN1 expression in the L1 is sufficient for correct organ positioning, as long as the L1-specific influx carriers are present. Thus, differentiation of inner tissues can proceed without PIN1 or any of the known polar transporters. On theoretical grounds, we suggest that canalization of auxin flux between an auxin source and an auxin sink may involve facilitated diffusion rather than polar transport. |
Formato |
application/pdf |
Identificador |
http://boris.unibe.ch/40917/1/Interaction%20neristem.pdf Kierzkowski, Daniel; Lenhard, Michael; Smith, Richard; Kuhlemeier, Cris (2013). Interaction between Meristem Tissue Layers Controls Phyllotaxis. Developmental cell, 26(6), pp. 616-628. Cell Press 10.1016/j.devcel.2013.08.017 <http://dx.doi.org/10.1016/j.devcel.2013.08.017> doi:10.7892/boris.40917 info:doi:10.1016/j.devcel.2013.08.017 info:pmid:24091013 urn:issn:1534-5807 |
Idioma(s) |
eng |
Publicador |
Cell Press |
Relação |
http://boris.unibe.ch/40917/ |
Direitos |
info:eu-repo/semantics/restrictedAccess |
Fonte |
Kierzkowski, Daniel; Lenhard, Michael; Smith, Richard; Kuhlemeier, Cris (2013). Interaction between Meristem Tissue Layers Controls Phyllotaxis. Developmental cell, 26(6), pp. 616-628. Cell Press 10.1016/j.devcel.2013.08.017 <http://dx.doi.org/10.1016/j.devcel.2013.08.017> |
Palavras-Chave | #580 Plants (Botany) |
Tipo |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed |