Auxin-associated phenotypes of SlTIR1 down-regulated lines.(A) Auxin-associated LR formation in wild type compared to SlTIR1 antisense tomato seedlings. (B) Effect of IAA and NPA treatment on the development of primary root ofwild-type (WT) and AS-TIR1 seedlings. The corresponding negative control experiments (CK) were run concomitantly. (C) Primary root length upon NPA treatment of WTand AS-TIR1-5 lines. Error bars represent mean ± standard error