杜仲节区结构与输水功能的研究  

Node Architecture and Hydraulic Function of Eucommia ulmoides Oliv

作　　者：孙永林[1] 沈繁宜[1] 

机构地区：[1]北京林业大学理学院,北京100083

出　　处：《现代农业科学》2008年第2期12-13,共2页

基　　金：国家自然科学30270343

摘　　要：以杜仲(散孔材)为试材,以一年生枝条为样本,对节和节间木质部进行解剖,用冲洗法测节和节间导水率损失的百分数。结果表明,对于杜仲枝条的各个部位,单位面积节间导管的数量总高于节区的数量;节间木质部单位面积导管的平均内径均大于节区导管的内径,其中在中部区别较为明显;节间导水率损失的百分数大于节区。The paper tried to study the anatomical basis of the hydraulic properties of nodes and internodes of one - year - old twigs of Eucommia ulmoides Oliv（diffuse- porous tree） and Robinia Pseudoacacial Linn. （ ring-porous tree）. Percentage loss of hydraulic conductivity of nodes and internodes were measured in flushing method . As far as Eucommia ulmoides, a comparison be- tween nodes and internodes showed that in the internodes there were more vessels per mm2 and wider average inside diameter than nodes, especially at the middle segment.

关 键 词：杜仲 节 输水功能 

分 类 号：S567.19[农业科学—中草药栽培] TV213[农业科学—作物学]