薄壁细胞向内生长的泡状物通过纹孔伸入相邻的管胞或导管形成的结构。
Tylose a bladder like ingrowth from a parenchyma cell into an adjacent tracheid or vessel through a paired pit.
瘤组织中的薄壁细胞均增生肥大，木质部的垂直管胞发生变形且变短。
Parenchyma in gall tissues were observed to occur hypertrophy or hyperplasia, and vertical tracheids in gall xylem were short and abnormal in shape.
轴向管胞之间、轴向管胞与射线薄壁细胞之间、轴向管胞与射线管胞之间，均有不同类型的纹孔对。
There are different types of pit-pair between the axial tracheids. the axial tracheid and the ray parenchyma, the axial tracheid and the ray tracheid.
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