The most popular root-promoting hormones are the auxins
indoleacetic acid (IAA), indolebutyric acid (IBA), and napthaleneacetic acid (NAA).
A number of natural substances do same as auxin activity, but
indoleacetic acid (IAA) is the first extracted and well-known growth regulator [5].
Production of phytohormones, such as the
indoleacetic acid (IAA), is possibly the main mechanism of plant growth promotion by rhizobia.
Indoles include indoxyl sulfate and
indoleacetic acid [9].
The endogenous hormone concentrations (
indoleacetic acid (IAA), abscisic acid (ABA), gibberellins 3 ([GA.sub.3]), and zeatin (ZT)) of the initial explants and calluses were determined by means of high pressure liquid chromatography (HPLC).
Effect of hormone treatment on callus formation and endogenous
indoleacetic acid and polyamine contents of soybean hypocotyl cultivated in vitro.
Amide-linked
indoleacetic acid conjugates may control levels of indoleacetic in germinating seedlings of Phaseolus vulgaris.