INFLUENCE OF PLUM ROOTSTOCKS ON THE DYNAMIC OF DRY MATTER IN THE ANNUAL SHOOTS OF CULTIVAR 'VICTORIA'
This paper reports on rootstock influence on plum tree winter-hardiness. Dry matter dynamic during winter in one-year-old shoots of plum trees was evaluated on Prunus domestica Victoria plum (2n=6x=48) in 2008-2009, 2009-2010 and 2010-2011 in Pūre HRC, Latvia. Sixteen rootstocks (St. Julien A, Brompton, Ackermann, Pixy, GF8/1, G5/22, GF655/2, Hamyra, St. Julien INRA2, St. Julien dOrleans, St. Julien Noir, Brompton, Wangenheims Zwetche, St. Julien Wädenswill, Myrobalana, Pr. Cerasifera var. divaricate were planted in 2001 for comparison. Samples were taken 5 times over the wintering period and dry matter content (mg g-1) was determined. Dry matter content during 3 wintering periods showed significant increase during December and January. No significant effect of rootstock was recorded. The most fluctuating content of dry matter in one-year shoots was observed for trees grafted on Myrobalana (496-541 mg g-1). More stable contents were detected in trees grafted onto Prunus cerasifera (495-507 mg g-1) and Pixy (503-516 mg g-1). These results would suggest that the latter rootstocks are suitable for the more variable winter weather conditions.
Dekena, D., Alsina, I. and Lepsis, J. (2013). INFLUENCE OF PLUM ROOTSTOCKS ON THE DYNAMIC OF DRY MATTER IN THE ANNUAL SHOOTS OF CULTIVAR 'VICTORIA'. Acta Hortic. 976, 355-360
Prunus domestica, winter-hardiness, vegetative rootstock, generative rootstock, dry matter