摘要
以胡桃楸(Juglans mandshurica)和黄波椤(Phellodendron amurense)的根尖(典型吸收根)为材料,研究了根尖解剖特征并估计了理论导水率,以及二者之间的潜在联系。结果表明:黄波椤根尖的理论导水率(即轴向导水率)比胡桃楸高出近2倍。两树种根尖的理论导水率均与根解剖特征之间存在紧密的联系,其中导水率与平均导管直径、最大导管直径、导管数目均存在较强的正相关关系(P<0.05),但是与根直径、中柱直径相关性较弱。多元回归分析表明,解剖特征可分别解释导水率72%(胡桃楸)和83%(黄波椤)的变异。
We explored the characteristics of anatomy and their relationship to theoretical conductivity of root tips in both Juglans mandshurica and PheUodendron amurense. The theoretical hydraulic conductivity （ axial conductance ） was higher in P. amurense than that in J. manshurica. In both species, theoretical hydraulic conductivity was closely related to the anatomi- cal traits. There were strong positive correlations between root conductance and mean conduit diameter, maximum diameter of conduits, and number of conduits, but weak for stele and root diameter. By multiple linear regression, the anatomical traits could explain the variation of root hydraulic conductivity in J. rnandshurica （72%） and P. amurense （83%）.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2014年第9期6-9,22,共5页
Journal of Northeast Forestry University
基金
国家林业科技支撑计划课题(2011BAD37B02-2)
国家自然科学基金项目(31100470)
关键词
根序
根形态
根尖解剖
胡桃楸
黄波椤
Branch order
Root morphology
Anatomy
Juglans mandshurica
PheUodendron amurense
