Articles
INTERSTEMS BUT NOT GRAFTING HEIGHT CONTROL VEGETATIVE GROWTH OF YOUNG ‘REDHAVEN’ PEACH TREES
Article number
903_71
Pages
513 – 519
Language
English
Abstract
Interstem and rootstock grafting heights are practices used in apple to restrict excessive scion vigor.
The objectives of this study were to evaluate the effect of interstems and grafting heights on the vegetative growth of young Redhaven peach trees grown near Clemson, South Carolina, and to determine if a dwarfing mechanism independent of the root system was involved.
In October 2005, Redhaven peach was chip budded on Lovell seedling rootstock, Pumiselect® and Krymsk® 1 clonal rootstocks, and Pumiselect®/Lovell and Krymsk® 1/Lovell interstem trees.
In another experiment, Lovell, Pumiselect® and Krymsk® 1 rootstocks were budded with Redhaven at 5, 25 and 45 cm from the ground.
Trunk cross-sectional area (TCA), number of shoot tip growing points, tree height, fresh and dry weight, and midday stem water potential were evaluated during the period 2006-2007. Pumiselect® and Krymsk® 1 interstem trees were 81 and 88%, respectively, the size of trees grafted on Lovell at the end of the first year, while Krymsk® 1 interstem trees were almost 50% smaller than those trees on Lovell at the end of the second year.
Height and fresh and dry weight of whole trees were also reduced by interstems, compared to Lovell.
In the second experiment, graft height did not affect the vegetative parameters of Redhaven trees.
Differences in growth were due to rootstocks where trees on Krymsk® 1 were significantly smaller than both Lovell and Pumiselect® independent of grafting height.
Midday stem water potential reduction followed a similar pattern observed in most of the measured growth parameters.
Interstem genotype but not grafting height affected the size of Redhaven trees in the studied combinations.
These data suggest the dwarfing mechanism in some Prunus rootstocks involves both the root system and other plant tissues.
The objectives of this study were to evaluate the effect of interstems and grafting heights on the vegetative growth of young Redhaven peach trees grown near Clemson, South Carolina, and to determine if a dwarfing mechanism independent of the root system was involved.
In October 2005, Redhaven peach was chip budded on Lovell seedling rootstock, Pumiselect® and Krymsk® 1 clonal rootstocks, and Pumiselect®/Lovell and Krymsk® 1/Lovell interstem trees.
In another experiment, Lovell, Pumiselect® and Krymsk® 1 rootstocks were budded with Redhaven at 5, 25 and 45 cm from the ground.
Trunk cross-sectional area (TCA), number of shoot tip growing points, tree height, fresh and dry weight, and midday stem water potential were evaluated during the period 2006-2007. Pumiselect® and Krymsk® 1 interstem trees were 81 and 88%, respectively, the size of trees grafted on Lovell at the end of the first year, while Krymsk® 1 interstem trees were almost 50% smaller than those trees on Lovell at the end of the second year.
Height and fresh and dry weight of whole trees were also reduced by interstems, compared to Lovell.
In the second experiment, graft height did not affect the vegetative parameters of Redhaven trees.
Differences in growth were due to rootstocks where trees on Krymsk® 1 were significantly smaller than both Lovell and Pumiselect® independent of grafting height.
Midday stem water potential reduction followed a similar pattern observed in most of the measured growth parameters.
Interstem genotype but not grafting height affected the size of Redhaven trees in the studied combinations.
These data suggest the dwarfing mechanism in some Prunus rootstocks involves both the root system and other plant tissues.
Publication
Authors
A.M. Weibel, G.L. Reighard
Keywords
Prunus persica, rootstock, interstock, budding
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