具缘纹孔

具缘纹孔的发生和次生壁的构建；

The forming of pit bordered and secondary cell wall ;

具缘纹孔的闭塞率较低以及部分具缘纹孔周缘破裂是高频真空干燥后木材浸注性提高的主要原因。

Low pit aspiration ratio and cracks of some bordered pits are the main reasons for increasing liquid impregnation after radio-frequency vacuum drying treatment .

其中有10种（隶8属、4科）木材维管间具缘纹孔膜具纹孔塞，其余不具纹孔塞。

Intervascular pit membranes with torns were found to be present in 10 species from 8 genera belonging to 4 families , but pit membranes were flat in the remainder .

A型是指纹孔室内瘤状层缺乏或罕见，B型则具明显的瘤状层。并对具缘纹孔在系统发育中的变化进行了讨论。

In type A , the warty layer is absent or rare in pit chamber and in type B , the warty layer is present , in this paper , the variation in phylogeny of the pit membrane in bordered pits is also discussed .