某些热带树木韧皮部筛管的比例。

The proportion of sieve elements in the phloem of some tropical trees.

机构信息

Botany Department, Monash University, Clayton, Victoria, Australia.

出版信息

Planta. 1970 Dec;95(4):351-4. doi: 10.1007/BF00384707.

Abstract

Measurements have been made of the proportion of the area of sieve elements in the cross-sectional area of the secondary phloem of trees of two tropical genera in which the presence of storied sieve plates makes the recognition of sieve elements particularly easy. This proportion, often accepted as one fifth in the literature on phloem and translocation, rises as high as three quarters in one of the trees measured.

摘要

已经测量了两个热带属树木中次生韧皮部横截面积中筛管面积的比例，这两个属的树木中存在有层理的筛板，使得筛管的识别特别容易。这个比例在关于韧皮部和物质转运的文献中通常被接受为五分之一，但在其中一棵被测量的树中，这个比例高达四分之三。