Effects of vascular bundle sizes of scions and stocks on graft-take and growth of grafted cactus, ruby ball.

摘要

In the grafted cactus, ruby ball (Gymnocalycium mihanovichii var. friedrichii, cv. Seolhong), the size of the vascular bundles of the scion and rootstock influenced the grafting rate and growth after grafting. The effects of scions diameter (1.56, 2.10, and 3.83 mm) and rootstocks diameter (1.66, 2.48, and 3.94 mm) on the grafting rate and growth of ruby ball were determined. The diameter of grafted scions increased upto 60 days after grafting, but there were no significant differences among the treatments. Vascular bundle size of the rootstock primarily affected the rooting of the grafted plants regardless of scion size. Graft-take percentage of all the treatments was generally higher than 96% at 90 days after grafting. These results indicated that graft-take was not related to the vascular bundle size of scion and rootstock, although the vascular bundle size of rootstock significantly affected the graft-take percentage. The chlorophyll contents of the scion were highest in the combination of the smallest stocks and scions and lowest in the largest stocks 20 days after grafting. The biomass of the grafted plants was higher when big rootstocks and scions were used..