MICROPROPAGATION OF STRYCHNOS HENINGSII FOR SUSTAINABLE CONSERVATION

Abstract

Strychnos henningsii is an important medicinal herb of the family Logoniaceae common name Muteta (Kikuyu andKamba), Muchimbi (Meru). It is an endangered plant that is facing threat of extinction owing to indiscriminate andunsustainable harvesting in the wild. Conventional breeding is difficult in this plant, and in-vitro multiplication isimportant to conservation and propagation. Tissue culture techniques are useful for ex-situ conservation of rareendemic or threatened plant species. An efficient protocol for rapid production of micro shoots was established.Multiple shoots were obtained using nodal segments with two auxiliary buds as explants on Ms mediumsupplemented with various concentrations of Cytokinins (Kinetin, Benzyl Amino Purine) and/or GA3, atconcentrations ranging from 0.5 to 10 mg/l. High frequency bud break 74.67% and multiple shoot formation wereinduced from nodal segments cultured on MS medium supplemented with 2.0mg/l BAP. Faster bud break coupledwith enhanced frequency of shoot development 87.53% and internode elongation were dependent on thesynergistic effect of GA3 (0.2 mg/l).