Abstract
An efficient protocol for micropropagation and in vitro flowering of Trichodesma indicum (Linn) R. Br. was developed using shoot tip explants. The physiological role of cytokinin and its combination with auxins on micropropagation and in vitro flowering was investigated. The highest number of shoots (9.94 ± 0.10) and the maximum average shoot length (5.56 ± 0.35 cm) were recorded on Murashige and Skoog (MS) medium supplemented with benzylaminopurine (BAP) (4.44 μM) and naphthaleneacetic acid (NAA) (2.69 μM). The effect of sucrose concentration on in vitro floral development was studied in plantlets cultured on MS medium supplemented with gibberellic acid (GA3) and BAP. The highest percentage of flowering (93.2%) was obtained on MS medium supplemented with GA3 (1.44 μM), BAP (1.33 μM) and sucrose (30 g l−1). Root formation from the adventitious shoots was easily achieved on MS medium containing indole-3-butyric acid (IBA) (2.46 μM). The regenerated plantlets showed 86% survival rate and were phenotypically normal. The described method can be successfully employed for large-scale multiplication and in vitro flowering of T. indicum.
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