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. 2008 May 20;55(2):175–187. doi: 10.1111/j.1365-313X.2008.03495.x

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© The Authors Journal compilation © 2008 Blackwell Publishing Ltd

Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation.

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Exogenous indole-3-acetic acid (IAA) can reverse the negative effect of 1-aminocyclopropane-1-carboxylic acid (ACC) on lateral root formation. Col, ein2-5 and eto1-1 seedlings were grown on control media, and after 5 days were transferred to media containing 1 μm ACC, 1 μm IAA or both. (a) At the time of transfer, the plate was marked with a dot at the position of the root tip. After 5 days of growth in the presence of the indicated treatments, images of roots were captured. (b) The number of lateral roots was quantified. The average and SE of 30 seedlings and significant differences within genotypes are reported; *P< 0.001.