Rooting rate mainly depends among others on: cultivars and genetic variation
among individuals within a cultivar [Tsay et al. 1980; Shi et al. 1995; Gonzalez Castanon
2002], type of explants [Shen et al. 1995], the history of pre-culture before subcultivating
plantlets on the last rooting medium [Yakuwa et al. 1982], rooting medium
with different growth regulators [Inagaki et al. 1981; Lin et al. 2008; Saharan 2010] as
well as subculture conditions [Inagaki et al. 1983; Mamiya and Sakamoto 2000].