POD was mainly distributed in the radial walls of the cambial cells and expanding xylem cell, especially at the corner of cell wall and cell wall close to the primary pit field.

• ）木质部细胞分化过程中过氧化物酶 (POD) 在细胞壁上的分布，并讨论了POD的分布位置与木质素沉积之间的关系。