1 Present address: Assistant Plant Physiologist, R.A.R.S., Lam, Guntur 522034
* Part of the Ph. D. Thesis of the first author.
Experiments were carried to study the effect of an auxin, IAA and antiauxin, TIBA and their interaction on the flowering of Cuseuta a short day plant, using in vitro technique. IAA had a pronounced effect on flowering under inductive conditions. At lower concentrations viz., 0.25 and 0,5 mg/l, IAA promoted flowering while at higher concentrations viz., 0.75, 1.0 and 5.0 mg/l, it inhibited flowering. In the basal medium containing no IAA, flowering was around 53 per cent under an inductive dark period. TIBA at 5 or 10 mg/1 produced cent percent flowering. TIBA when wed in combination with IAA reversed the inhibitory effect of the latter on flowering to some extent.
