Ecological wood anatomy of NepaleseRhododendron (Ericaceae). 1. Interspecific variation |
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Authors: | Shuichi Noshiro Mitsuo Suzuki Hideaki Ohba |
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Institution: | (1) Forestry and Forest Products Research Institute, Tsukuba Norin P.O. Box 16, 305 Ibaraki, Japan;(2) Faculty of Science, Tohoku University, 980-77 Sendai, Aoba, Japan;(3) Department of Botany, University Museum, University of Tokyo, Hongo, 113 Tokyo, Japan |
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Abstract: | The relationship of selected wood anatomical characters of NepaleseRhododendron with stem diameter, plant height, altitude, and plant form was investigated. We studied one to three specimens each of 26
species: five species each of trees and subtrees I, three species of subtrees II, and 13 species of shrubs. Multiple regression
analysis and actual distribution of character values show that pore characters and multiseriate ray ratio have a stronger
correlation with stem diameter than altitude; that pore density, vessel element length, fiber-tracheid length, and multiseriate
ray density and width are equally related to altitude and stem diameter, or to altitude and plant height; and that bar number,
and multiseriate ray area and height have a stronger connection with altitude. Among the characters, average pore area is
most strongly correlated with stem diameter and increases exponentially as diameter increases. For wood structure of NepaleseRhododendron, 17 to 63 % of the variation is affected by non-anatomical factors. The general trends in wood structure of NepaleseRhododendron show that trees and subtrees form one continuous unit whereas shrubs form another that often has wider ranges of variation. |
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Keywords: | Altitude Nepal Plant height Rhododendron Stem diameter Wood anatomy |
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