Polyamine effects on the endogenous polyamine contents, nitirc oxide release, growth and differentiation of embryogenic suspension cultures of Araucaria angustifolia (Bert.) O. Ktze - Silveira, Vanildo; Santa-Catarina, Claudete; Tun, Ni Ni; Scherer, Günther F. E; Handro, Walter; Guerra, Miguel Pedro; Floh, Eny Iochevet Segal (Plant Science, 2006)