phloem词根词缀

The secondary phloem mother cell were divided and differentiated into sieve tube, companion cell, libriform fibre, parenchyma cell, and a few sclereid cells, The sieve tube and companion cell was originated from inequality mitosis of sieve mother cell.

维管形成层韧皮部母细胞分裂分化形成筛管、伴胞、韧皮薄壁细胞、韧皮纤维和少量的石细胞，筛管和伴胞来源于筛管母细胞的不均等有丝分裂。

In type ⅰ, as seen in 5 species of Euonymus, the sieve tube elements have more inclined end walls and numerous sieve areas ( compound sieve plates), phloem rays are almost uniseriate.

类型Ⅰ：筛管分子端壁倾斜，筛域数多，都为复筛板，韧皮射线大多为单列。卫矛属（Euonymus）的5种植物属于这一类型；

They had fearfully marked negative correlation between the ratio of phloem area/ transect area and length of node; fearfully marked positive correlation between sieve tube density and length of node;

韧皮部面积/横断面积比值和筛管密度与节间长度分别呈极显著负相关和正相关；