詞語：protophloem
protophloem的解釋
protophloem[,prəutəu'fləueml]n.【植物學】原生韌皮部
protophloem的意思
protophloem 原生韌皮部;先皮韌皮部;先成篩管部;原始韌皮部;
protophloem的參考例句
1.It consists of the PROTOPHLOEM (formed first) and METAPHLOEM. 由原生韌皮部（最早形成的）和後生韌皮部組成。
2.Protophloem The first-formed PRIMARY PHLOEM, differentiated from the procambium in the region just behind the meristem. 最早形成的初生韌皮部，由位於分生組織中的原形成層分化而來。
3.The secretory canals presenting in phloem of stem and leaf originated from two or three exterior layers of protophloem cells in the procambium bundles. 莖和葉脈韌皮部內的分泌道起源於原形成層束原生韌皮部外側的2~3層細胞；