橡胶三合树树冠与树干间的相互影响──茎的生长和组织分化

Interaction Between Trunk and Crown Components of the Three-Part Rubber Trees: Trunk Growth and Tissue Differentiation

以ＲＲＩＭ６００等巴西橡胶无性系为树干（中间砧），以光亮橡胶变种（ＨｅｖｅａｎｉｔｉｄａＭａｒｔｖａｒ．ｔｏｘｉｃｏｄｅｎｄｒｏｉｄｅｓ）为树冠（接穗）组成的橡胶三合树，茎的生长仍保持着供体的特性，但受供体生势的明显影响。在接合部，茎的结构发生了较大变化，其中值得注意的是：（１）生势较强的树干的结构在生势较弱的树冠影响下，其多数结构指标不是变小而是变大；（２）接合部茎的一些结构（如筛管）的指标近于一致，且其结构变化足逐渐发生的。

The three-part rubber trees with Hevea brasiliensis clone as interstock and Heveanitida Mart. var. toxicodendroides as crown (scion) showed similar characteristics of the girthgrowth to their donors (the trunk and crown components), but were found affected by thevigor of donors. The stem structure was changed at the union, and it was interesting to notethat most parameters of the trunk (interstock) structure with higher vigor of the donor werehigher under the crown of low vigor and that some structures (such as sieve vessels) at theunion were found nearly identical in parameters which changed gradually..