Many trees succumb as a black line develops along the graft union .

沿着嫁接结合处长着一条黑线，结果许多树都死亡了。

After the graft union has sealed, the upper portion of the understock is removed.

待接口愈合之后，除去砧木的上部。

In the graft union of dwarfing rootstock 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；

The dynamic changes of plant hormone(LAA) were monitored by using ELISA technology during the formation of graft union.

本文应用植物激素间接酶联免疫技术（ELISA），第一次定量检测了嫁接植株形成过程中生长素（LAA）的动态变化。

The entire graft union process experienced forming of callus, connect of callus, connect of cambium and forming of vascular four phase.

甜杮砧穗之间的愈合过程包括愈伤组织的形成、砧穗间愈伤组织的连接愈合、形成层的形成连接、疏导组织的形成等四个阶段。