New Zealand Journal of Crop and Horticultural Science
abstracts
Effects of auxins and cytokinins on graft union of grapevine (Vitis vinifera)
Cafer Köse
Muharrem Güleryüz
Department of Horticulture
Faculty of Agriculture
Atatürk University
25240 Erzurum, Turkey
email: ckose@atauni.edu.tr
Abstract The aim of this study was to determine the effects
of some auxins and cytokinins on graft union and root formation of grafted
cuttings of four different grapevine (Vitis vinifera) graft combinations
(41B-Erenköy
Beyazi, 41B-Italia, Rupestris du Lot-Erenköy Beyazi, and Rupestris du Lot-Italia).
The cut grafting surfaces of both the scion and rootstock were first dipped into
either 1-naphthaleneacetic acid (NAA), indole-3-butryic acid (IBA), benzyladenine
(BA), or kinetin (Ki) for 20 s. NAA and IBA were applied at concentrations of
500, 1000, and 2000 mg/litre and BA and Ki were applied at rates of 250, 500,
and 1000 mg/litre. Following this treatment the cuttings were grafted, stratified,
and hardened. Control group cuttings were grafted without any application. Results
showed that the physiological effects of cytokinins differed from auxins. In
general, Ki and BA stimulated rapid proliferation of callus between the scion
and rootstock whereas NAA and IBA increased root formation at the basal end of
grafted cuttings compared with the control. The best results were obtained from
treating the graft cut-surfaces of graft combinations with 250 and 500 mg/litre
Ki or BA. Except for the 1000 mg/litre concentrations, Ki and BA showed better
callusing rate and callusing degree at grafting point of all tested graft combinations
compared with the control, whereas rooting rate and rooting degree were enhanced
by application of IBA and NAA compared with the control. In all graft combinations,
the highest success rate (100%) was obtained from 250 mg/litre Ki application.
Significant increases in success rate and callus formation as callusing rate
and callusing degree at the grafting zone indicated that the Ki and BA may have
the potential to improve graft union formation.
Keywords auxins; callusing; cytokinins; grafting; grapevine
New Zealand Journal of Crop and Horticultural Science, 2006, Vol. 34:
145–150
0014–0671/06/3402–0145 © The Royal
Society of New Zealand 2006
H04108; Online publication date 12 April 2006. Received 9 December
2004; accepted 16 February 2006
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