5,6-Dichloroindole-3-acetic acid and 4-chloroindole-3-acetic acid, two potent candidates for new rooting promoters without estrogenic activity
2010
Katayama, M., National Inst. of Advanced Industrial Science and Technology Chubu, Nagoya (Japan) | Saito, T. | Kanayama, K.
5,6-Dichloroindole-3-acetic acid (5,6-Cl2-IAA, 1) and 4-chloroindole-3-acetic acid (4-Cl-IAA, 2), synthesized from the corresponding chlorinated indole compounds, showed strong rooting-promoting activity in black gram cuttings. 5,6-Cl2-IAA was the most potent of all compounds examined. At a concentration of 5 x 10E-5 M, its activity was 15 times higher than that of 4-(3-indole)butyric acid (IBA), an active ingredient in commercially available rooting promoters. The activity of 4-Cl-IAA was also four times higher than that of IBA at the same concentration. 5,6-Cl2-IAA and 4-Cl-IAA had no estrogenic activity as measured using an estrogen receptor binding assay.
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