Interactive Effect of Auxin and Etiolation on Adventitious Root formation in Cuttings of <I>Tectona grandis</I> Linn. F.

Abstract

The effects of stock plant etiolation on rooting behaviour of stem cuttings taken from one-year-old seedling of Teak (Tectona grandis Linn. F.) were investigated. Except mean shoot diameter, etiolation significantly increased mean shoot length, internodal length, number of coppice shoot, number of leaves, number of nodes and total sugar content of branches. Etiolation increased total soluble sugar content of branches. Studies have shown that etiolation had pronounced effect on per cent sprouting, rooting, mean number of root length and mean number of root per cutting. Etiolated cutting have shown 100 per cent rooting, while nonetiolated (control) cutting under similar condition have given 46.60 per cent rooting. Application of NAA has significantly decreased rooting potential of even etiolated cuttings. Stock plant etiolation and NAA have not shown significant interaction on adventitious root formation.