In the graft union of dwarfingrootstock M26, callus had the most cell layers, and vessel was in the least coaxial;
矮化砧M26的嫁接口内愈伤组织细胞层数最多，导管不同轴程度最高；
2
This essay studied the effect of shading fruit by bagging in the dry matter production in apple trees from M26 DwarfingRootstock.
用果实套袋（光处理）方法，研究了6年生M26矮化砧苹果树果实套袋对干物质生产能力的影响。
3
The technical system of tissue culture and rapid propagation of the S series dwarfingrootstock of pear was further perfected through the micrografting.