Effect of stionic combinations on anatomical characteristics of graft union in nursery plants of pear

The effects of different Stionic combinations on the anatomical characteristics of the graft union in pear were studied taking four rootstocks, five scion varieties with or without Beurre Hardy as interstock. The scion varieties Red Bartlett and Max Red Bartlett when grafted on Kainth (Pyrus pashia Buck and Ham.) and Quince C rootstocks without interstocks increased the wood as well as bark thickness, while the number and size of stomata increased significantly when Flemish Beauty was grafted on Kainth whereas on Quince C the size of stomata was longer. The Stionic combination Red Bartlett worked on Kainth without interstock increased the number of primary xylem vessels, whereas, more secondary xylem were recorded in Max Red Bartlett scions on Kainth without interstock.