Abstract

INFLUENCE OF IAA AND IBA ON ROOTING AND SHOOT FORMATION OF STEM CUTTINGS OF RHINACANTHUS NASUTUS (L). KURZ. - AN ENDANGERED MEDICINAL PLANT FROM INDIA

C. Alagesaboopathi* and G. Subramanian

Abstract

Stem cuttings of Rhinacanthus nasutus (L.) Kurz. are comfortable to root. Treatment with IAA (Indole-3-Acetic Acid and IBA (Indole-3- Butyric Acid) determined promotion of rooting and enlarged shoot development. The basal part of cuttings successful in rooting responded. Stem cuttings of Rhinacanthus nasutus were treated with various concentrations of IBA (100, 200, 300, 400 and 500 ppm). IBA treatments significantly improved rooting in stem cuttings. Among the cuttings IBA 300 ppm produced percentage of rooting (66.05), number of roots percutting (9.60) and length of roots (19.70 cm). Stem cuttings of R. nasutus were with different concentrations of IAA (100, 200, 300, 400 and 500 ppm). IAA treatments indicatively upgraded rooting in stem cuttings. Among the cuttings IAA 500 ppm caused percentage of rooting (60.10), number of roots percutting (10.12) and length of roots (10.15 cm). The most acceptable manner for vegetative propagation of R. nasutus would be cuttings soaked either in 300 ppm IBA solution or in 500 pm IAA solution.

Keywords: Medicinal Plant, Stem cutting, Rhinacanthus nasutus. Indole -3-Acetic Acid, Indole-3-Butyric Acid.