Optimization of a Rapid Propagation System for Mass Production of High-Quality Plantlets of Trichosanthes kirilowii cv. ‘Yuelou-2’ via Organogenesis
Keywords:in vitro; morphological characterization; plant growth regulator; rapid propagation; Trichosanthes kirilowii
Trichosanthes kirilowii Maxim is a perennial plant possessing great medicinal and edible value. In this study, an efficient rapid propagation system was developed for in vitro production of high-quality plantlets of T. kirilowii cv. ‘Yuelou-2’ via organogenesis. Shoots were established from the nodal stems of this plant by cultured on Murashige and Skoog (MS) basal medium containing different concentrations of naphthalene acetic acid (NAA), indole-3-butyric acid (IBA) and 6-benzyladenine (6-BA) according to a L9 (34) orthogonal array design. MS medium supplemented with 0.5 mg l-1 6-BA alone conferred significant enhancement of shoot induction and development by variance and statistical analysis of shoot induction frequency, shoot length, as well as lateral shoot number and total node number per explant. Rooting percentage, root morphological characteristics, plantlet survival rate, as well as plantlet growth performance in vitro and ex vitro were comprehensively assessed, and results showed that the addition of 1.0 mg l-1 NAA to 1/2 MS medium was the most responsive for root induction and production of high-quality plantlets from the regenerated shoots. The in vitro propagation system described here has the potential for large-scale and rapid production of in vitro plantlets of seed variety of T. kirilowii in a sustainable manner.
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