Enxertia recíproca e AIB como fatores indutores do enraizamento de estacas lenhosas dos porta-enxertos de pessegueiro 'Okinawa' e umezeiro

Abstract

Rootstock rooting potential may be influenced by the graft because auxin down movement and cofactors. The objective was to verify the reciprocal grafting effects between peach tree rootstock: Japanese apricot (A) and 'Okinawa' (B), IBA at the 0 and 4.000 mg L-1 concentrations upon both woody cutting rooting. The following grafting combinations were used on the grafted cuttings (two gems graft without leaves) in rootstock 20 cm long: A/B and B/A and woody cuttings not grafted an treated IBA as check. Later the cutting were kept in black polyethylene bags containing washed sand and maintained in greenhouse with intermittent mist during 80 days. IBA was efficient to improve the rooting, percentual, number and length primary roots of peach tree 'Okinawa' and Japanese apricot cuttings grafted or no. The reciprocal grafting between 'Okinawa' peach tree (rootstock)/Japanese apricot (graft), treated IBA, improved the rooting cuttings percentual 'Okinawa' peach tree.