Endogenous indol-3yl-acetic acid in stele and cortex of gravistimulated maize roots

Abstract

In primary maize roots (cv. LG 11) endogenous indol-3yl-acetic acid (IAA), measured by gas chromatography-mass spectrometry (GC-MS) technique, was predominantly located in the stele. When these roots were placed for 2 h in horizontal position and in white light, the IAA level was slightly but significantly enhanced in the lower part of the cortex of the elongation zone.