Germination and a-amylase Activity in the Grains of Wheat, Treated with Chloroindole Acetic Acids

The grains of Triticum aestivum (L.), c.v. HD-2204, were imbibed in 10^-6 or 10^-8 M aqueous solutions of IAA; 4-CIIAA; 5-CIIAA; 6-Cl IAA; 7-CIIAA; 4,6Cl2AA or 4,7-Cl2lAA for 6, 12 or 24 hours and transferred to distilled water for germination up to 96 hours. Monochloroindole-3-acetic acids, irrespective of their concentration and duration of soaking, improved germination (%) and the activity of a-amylase, noted at three durations of soaking. Dichloroindole-3-acetic acids were as effective as IAA. Twelve hours soaking in 4Cl IAA proved best but was closely followed by 7-CI IAA.