<i>ERF</i> genes are required for the <i>eto1</i> vascular phenotype.

<p>(A) Graph showing cells per vascular bundle at the base of the inflorescence stem of 10 week Col, <i>eto1</i>, <i>eto1 erf109</i>, <i>eto1 erf1</i> and <i>eto1 erf109 erf1</i> plants. <i>eto1 erf109 erf1</i> plants are significantly smaller than <i>eto1</i> single mutants. (B) Graph showing hypocotyl diameter (mm) of Col, <i>eto1 erf109</i>, <i>eto1 erf1</i> and <i>eto1 erf109 erf1</i> plants at 10 weeks. <i>ERF109</i> and <i>ERF1</i> are required for increases in hypocotyl diameter observed in <i>eto1</i>. (A and B) * significantly smaller than <i>eto1</i> (<i>p</i><0.05); error bars are standard error.