An Auxin-Mediated Shift toward Growth Isotropy Promotes Organ Formation at the Shoot Meristem in Arabidopsis (Record no. 49761)

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fixed length control field 02201nam a2200325Ia 4500
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control field MX-MdCICY
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control field 20250625160135.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-15581
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Title An Auxin-Mediated Shift toward Growth Isotropy Promotes Organ Formation at the Shoot Meristem in Arabidopsis
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Volume/sequential designation Current Biology, 24(6), p.2335-2342, 2014
520 3# - SUMMARY, ETC.
Summary, etc. To control morphogenesis, molecular regulatory networks have to interfere with the mechanical properties of the individual cells of developing organs and tissues, but how this is achieved is not well known. We study this issue here in the shoot meristem of higher plants, a group of undifferentiated cells where complex changes in growth rates and directions lead to the continuous formation of new organs [1, 2]. Here, we show that the plant hormone auxin plays an important role in this process via a dual, local effect on the extracellular matrix, the cell wall, which determines cell shape. Our study reveals that auxin not only causes a limited reduction in wall stiffness but also directly interferes with wall anisotropy via the regulation of cortical microtubule dynamics. We further show that to induce growth isotropy and organ outgrowth, auxin somehow interferes with the cortical microtubule-ordering activity of a network of proteins, including AUXIN BINDING PROTEIN 1 and KATANIN 1. Numerical simulations further indicate that the induced isotropy is sufficient to amplify the effects of the relatively minor changes in wall stiffness to promote organogenesis and the establishment of new growth axes in a robust manner.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Sassi, M.
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Personal name Ali, O.
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Personal name Boudon, F.
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Personal name Closrec, G.
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Personal name Abad, U.
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Personal name Cellier, C.
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Personal name Chen, X.
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Personal name Chen, X.
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Personal name Milani, P.
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Personal name Friml, J.
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Personal name Vernoux, T.
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Personal name Goding, C.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Hamant, O.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Trass, J.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1MnJvS6IfcAaF7fb20k26MICkMedzhV86/view?usp=drivesdk">https://drive.google.com/file/d/1MnJvS6IfcAaF7fb20k26MICkMedzhV86/view?usp=drivesdk</a>
Public note Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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Source of classification or shelving scheme Clasificación local
Koha item type Documentos solicitados
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-15581 25.06.2025 25.06.2025 Documentos solicitados