The objective of this work was to evaluate the dormancy dynamic of 'Niagara Branca' grape and 'Bruno' kiwi tree buds in a region of low chill occurrence. The experiments were carried out in 2007 and 2008 through cut branches every two weeks in orchards in Pinhais-PR. In the last date, an additional group of stems was collected and maintained in a refrigerator at temperature of 4 to 7º C by 1440 hours. The evaluation of dormancy was observed by the biological test of single node cuttings into a growth room with temperature of 25º C and photoperiod of 16 hours. The chilling hours (CH) and chilling units (CU) were estimated from the region. The two species were analyzed individually. The entirely randomized experimental design was used with 12 treatments in 2007 and 11 treatments in 2008, both with four replications and ten cutting per plot. The endodormancy of buds of quivizeiro 'Bruno' install is from April and reached higher intensity of the end of May to the second half of June. The end of endodormancy can naturally occur by the end of August, but with variations among years. The endodormancy of buds of grapevine 'Niagara Branca' installed in April and remains strong until May. The end of natural endodormancy occurs half of August to early September.
Vitis labrusca; Actinidia deliciosa; budburst; endodormancy
