title: Phyllotaxy: Beyond the Meristem and Auxin Comes the miRNA.
abstract: Phyllotaxy, the arrangement of organs along the stem, has puzzled scientists for centuries. The shoot apical meristem plays a crucial role in the formation of this pattern, by initiating organ primordia on its flanks in a temporally and spatially controlled manner. Recent studies have shown that primordium position at the meristem is governed by local auxin gradients, but little is known about the subsequent events leading to the phyllotaxy along the mature stem.In a recent report we showed that deviation from the initial phyllotaxy set-up in the meristem is generated during stem growth of transgenic lines affected in miR164-mediated regulation of CUC2 and, to a smaller extent, of wild-type Arabidopsis. This underlines the requirement of maintaining the pattern initiated at the meristem during stem development. In this addendum, we discuss the importance of this mechanism in different mutants and at different stages of Arabidopsis development.
authors.affiliation: Laboratoire de Biologie Cellulaire; Institut J.P. Bourgin; INRA, UR501; Versailles, France.
authors.forename: Alexis
authors.initials: A
authors.lastname: Peaucelle
authors.forename: Patrick
authors.initials: P
authors.lastname: Laufs
references.citation: Dev Biol. 2003 Feb 15;254(2):215-25
references.pmid: 12591242
references.citation: Curr Biol. 2004 Jun 22;14(12):1035-46
references.pmid: 15202996
references.citation: Plant Cell. 2001 Jun;13(6):1263-79
references.pmid: 11402159
references.citation: Cell. 2002 Aug 23;110(4):513-20
references.pmid: 12202040
references.citation: Plant Cell. 2003 Jul;15(7):1563-77
references.pmid: 12837947
references.citation: EMBO Rep. 2006 Oct;7(10):1052-8
references.pmid: 16977334
references.citation: Int J Dev Biol. 2005;49(5-6):539-46
references.pmid: 16096963
references.citation: Plant J. 2006 Sep;47(6):841-50
references.pmid: 16889646
references.citation: Plant Cell Physiol. 2002 Mar;43(3):298-306
references.pmid: 11917084
references.citation: Science. 2005 Feb 11;307(5711):932-5
references.pmid: 15705854
references.citation: Development. 2007 Mar;134(6):1045-50
references.pmid: 17251269
references.citation: Development. 2007 Mar;134(6):1051-60
references.pmid: 17287247
references.citation: Development. 2001 Apr;128(7):1127-35
references.pmid: 11245578
references.citation: Plant Cell. 2000 Dec;12(12):2351-2366
references.pmid: 11148283
references.citation: Curr Biol. 2005 Feb 22;15(4):303-15
references.pmid: 15723790
references.citation: Development. 2002 Mar;129(5):1085-94
references.pmid: 11874905
references.citation: Development. 1993 Oct;119(2):397-418
references.pmid: 8287795
references.citation: Dev Cell. 2003 Feb;4(2):205-17
references.pmid: 12586064
references.citation: Plant Cell. 2006 Nov;18(11):2929-45
references.pmid: 17098808
references.citation: Plant Mol Biol. 2006 Apr;60(6):811-26
references.pmid: 16724254
references.citation: Curr Biol. 2004 Feb 17;14(4):346-51
references.pmid: 14972688
references.citation: Development. 1999 Dec;126(23):5231-43
references.pmid: 10556049
references.citation: Plant J. 2004 Apr;38(1):182-92
references.pmid: 15053771
references.citation: EMBO J. 1998 Mar 16;17(6):1799-809
references.pmid: 9501101
references.citation: Development. 2004 Sep;131(17):4311-22
references.pmid: 15294871
references.citation: Plant Cell. 1997 Jun;9(6):841-57
references.pmid: 9212461