Phyllotaxy: Beyond the Meristem and Auxin Comes the miRNA.
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.
Peaucelle
Alexis
A
Laboratoire de Biologie Cellulaire; Institut J.P. Bourgin; INRA, UR501; Versailles, France.
Laufs
Patrick
P
Dev Biol. 2003 Feb 15;254(2):215-25
12591242
Curr Biol. 2004 Jun 22;14(12):1035-46
15202996
Plant Cell. 2001 Jun;13(6):1263-79
11402159
Cell. 2002 Aug 23;110(4):513-20
12202040
Plant Cell. 2003 Jul;15(7):1563-77
12837947
EMBO Rep. 2006 Oct;7(10):1052-8
16977334
Int J Dev Biol. 2005;49(5-6):539-46
16096963
Plant J. 2006 Sep;47(6):841-50
16889646
Plant Cell Physiol. 2002 Mar;43(3):298-306
11917084
Science. 2005 Feb 11;307(5711):932-5
15705854
Development. 2007 Mar;134(6):1045-50
17251269
Development. 2007 Mar;134(6):1051-60
17287247
Development. 2001 Apr;128(7):1127-35
11245578
Plant Cell. 2000 Dec;12(12):2351-2366
11148283
Curr Biol. 2005 Feb 22;15(4):303-15
15723790
Development. 2002 Mar;129(5):1085-94
11874905
Development. 1993 Oct;119(2):397-418
8287795
Dev Cell. 2003 Feb;4(2):205-17
12586064
Plant Cell. 2006 Nov;18(11):2929-45
17098808
Plant Mol Biol. 2006 Apr;60(6):811-26
16724254
Curr Biol. 2004 Feb 17;14(4):346-51
14972688
Development. 1999 Dec;126(23):5231-43
10556049
Plant J. 2004 Apr;38(1):182-92
15053771
EMBO J. 1998 Mar 16;17(6):1799-809
9501101
Development. 2004 Sep;131(17):4311-22
15294871
Plant Cell. 1997 Jun;9(6):841-57
9212461