Abstract
A method for micropropagation ofDalbergia sissoo has been developed. Single node segments obtained from coppice shoots of a mature tree (20 - 25 year old) produced 3-4 shoots per explant on Murashige and Skoog (MS) medium containing 4.4 x 10-6 M benzylaminopurine (BAP) and 4.4 Ă 10-7 M of Β-naphthoxy acetic acid (NOA) (shoot multiplication medium) within 4 weeks. Thein vitro regenerated shoots were 3 - 4 cm in length and provided 2 to 3 culturable nodal segments which on shoot multiplication medium again produced 3-4 shoots. Following this procedure 18-24 shoots were produced from single nodal segment within 60 d. 80 % of the shoots directly produced five roots when they were firstly treated with MS medium supplemented with 10-5 M indole-3-butyric acid (IBA) and subsequently transferred to half strength liquid MS medium containing 1 % activated charcoal followed by half strength liquid MS free hormones, vitamins and activated charcoal. Thein vitro raised plants were hardened for survival after transplantation to soil by exposing them to various humidity conditions, gradually from higher to low, with nearly 100 % transplant success.
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