In vitro mass multiplication of economically endangered forest plant Chironji (Buchanania lanzan Spreng.)

A protocol was developed for organogenesis and in vitro multiplication of chironji using young leaf and nodal segments. Maximum 41 callus were induced in MS containing 2.5mg/l 2,4-D after 3 weeks of inoculations of leaf explants. Further, callus and nodal segments were inoculated alone and combination of Thidiazuron (TDZ), BAP, and Kinetin and the maximum shoot induction was obtained in a wood plant medium 2.5mg/L TDZ alone enriched with 0.1% of activated charcoal. In comparison, the maximum shoot proliferation (78%) was observed in ½WPM containing 2.5mg/L TDZ and 0.5mg/L GA₃ with 5.7 shoots per explants. Maximum 8 roots were observed in vitro regenerated shoots with WPM supplemented with 2.0 mg/l IBA enriched with 0.2% activated charcoal. Plants with 3-4cm in root length were acclimatized and transferred to pots containing an autoclaved mixture of soil, sand and manure in 2:1:1 ratio. Approximately 70% survival rate was recorded from in vitro grown plantlets on transfer to pots.