Root development of Phaius tankervilliae
In vitro rooting of regenerated shoots was achieved on ¾ MS medium equipped with 0.1mg l-1NAA (α-naphthalene acetic acid), though the other concentrations (1/2 and standard MS media) were also tested. NAA as a key hormone in inducing roots are also reported in several established micro-propagation protocols like M. pruriens var. (Chattopadhyay et al. 1995), Jatropha curcas (Rajore et al. 2002), Hyptis suaveolens (Britto et al. 2001), Pisonia alba (Jagadish et al. 1999 ) and M. pruriens var. Utilis (Sathyanarayana et al. 2008). We observed extensive root development in the presence of NAA within one month. Whereas, in control plant no NAA was added, root development was comparatively negligible. It proved the potential of NAA in root development of Phaius tankervilliae