筛胞

但与被子植物的伴胞不同，它们不和筛胞起源于一个共同的母细胞。

Unlike the companion cells of angiosperms , they are not derived from the same mother cell as the sieve cell .

根的次生韧皮部则由筛胞和韧皮薄壁细胞组成。

The secondary phloem consisted of sieve cells and phloem parenchymas .

裸子植物筛胞的结构和发育四川裸子植物区系研究

THE STRUCTURE AND DEVELOPMENT OF SIEVE & CELL IN GYMNOSPERMS A floristic analysis on the gymnosperms of Sichuan

韧皮部各种细胞间存在发达的胞间连丝，有利于光合产物由叶肉细胞共质体运输至筛胞分子；

Numerous plasmodesmata connected the cells in the phloem and may facilitate sugar transfer from mesophyll cells into phloem cells .

轴向系统的主要成分为筛胞、韧皮薄壁组织细胞、含晶细胞和径向片；

The main constituents of the axial system are sieve cells , phloem parenchyma cells , crystalliferous cells and radial plates .

结论南方红豆杉根的次生构造与其他裸子植物和双子叶植物一致，但次生木质部由管胞，次生韧皮部由筛胞组成。

Conclusions The secondary structure of the root of Taxus chinensis var. mairei accords with that of other gymnosperms and dicotyledons , although its secondary xylem is constituted with tracheids and sieve cells .

轴向系统由筛胞、韧皮薄壁组织细胞、蛋白细胞和韧皮纤维组成，径向系统由韧皮射线组成。

In the axial systems , the phloem consists of sieve cells , phloem parenchyma cells , albuminous cell and phloem fibers . In the radial systems , it consists of phloem rays .