PHB PHV and CNA restrict meristem size.

<p>(A) <i>phb phv cna</i> triple mutants displaying tricotyledon phenotype (left) and inflorescence stem fasciation (right) are shown. (B) Mean numbers of floral organs per flower with standard error of the mean for wild-type and various mutants are shown. (C) Semi-quantitative RT-PCR measuring the accumulation of <i>WUS</i>, <i>CLV3</i> and control <i>TUBULIN</i> transcripts in wild-type (WT), <i>clv3-2</i> and <i>phb phv cna</i> (ppc) 5 days-old seedlings. (D) A comparison of <i>PCLV3</i>:<i>GUS</i> and <i>PWUS</i>:<i>GUS</i> reporter line activity of wild-type (left) and <i>phb phv cna</i> (right) seedlings.