Maturation-related loss in rooting competence by loblolly pine stem cuttings: The role of auxin transport, metabolism and tissue sensitivity

aia auxinas auxine auxins bouture cuttings enracinement enraizamiento epicotilos epicotyls esquejes hipocotilos hypocotyle hypocotyls iaa maturation metabolism metabolisme metabolismo pinus taeda plant growth substances rooting stems sustancias de crecimiento vegetal tallo tejido vascular tige tissu vasculaire vascular tissues