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首页> 外文期刊>Wood Science and Technology >Comparison of wood physical and mechanical traits between major gymnosperm and angiosperm tree species in China
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Comparison of wood physical and mechanical traits between major gymnosperm and angiosperm tree species in China

机译：中国主要裸子植物和被子植物树种的木材物理机械特性比较

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摘要

Many wood physical and mechanical traits are important functional attributes for tree species, but variation in these traits among taxonomic categories such as between gymnosperms and angiosperms is still poorly documented. Here, the systematic differences in 12 traits and their allometric relationships between the two tree categories and the potential effects of phylogeny are explored based on a database for major gymnosperm and angiosperm tree species across China. The results are summarized below: (1) means of wood traits were all significantly lower in gymnosperms than in angiosperms. (2) Air-dried density (ADD) and tangential shrinkage coefficient (TSC) are key traits that summarize the correlations among wood traits for gymnosperms, while ADD and radial shrinkage coefficient (RSC) represent those for angiosperms. The allometric slopes of other traits, except for hardness of transverse section (HES), against ADD for gymnosperms were significantly steeper than or similar to the corresponding slopes for angiosperms. On the contrary, the slopes of other traits (except TSC) against RSC for gymnosperms were shallower than or similar to their counterparts for angiosperms. Generally, wood traits were positively related with each other, except that TSC was negatively related to density-related (ADD, BD) and hardness-related traits (HES, HRS and HTS) in gymnosperms. (3) Phylogeny had significant effects on some wood traits of gymnosperms, but had no effects on traits of angiosperms. The present analyses demonstrated a systematic difference in wood traits between two major plant categories, which suggests the evolutionary divergence (TSC, RSC) and convergence (ADD) in key functional traits among woody plants.
机译：许多木材的物理和机械性状是树种的重要功能属性，但是分类学类别中（例如裸子植物和被子植物之间）这些特征的变异仍然很少得到记录。在此，基于中国主要裸子植物和被子植物树种的数据库，探讨了这两种树的12个性状的系统差异及其异形关系以及系统发育的潜在影响。结果总结如下：（1）裸子植物的木材性状均显着低于被子植物。 （2）风干密度（ADD）和切向收缩系数（TSC）是关键特征，总结了裸子植物木材性状之间的相关性，而ADD和径向收缩系数（RSC）代表被子植物。对于裸子植物，除横断面硬度（HES）以外，其他性状的斜率相对于ADD的斜率明显比被子植物的相应斜率陡峭或相似。相反，裸子植物的其他性状（TSC除外）相对于RSC的斜率比被子植物的斜率浅或相似。通常，木材性状彼此呈正相关，除了TSC与裸子植物的密度相关性（ADD，BD）和硬度相关性状（HES，HRS和HTS）负相关。 （3）系统发育对裸子植物的某些木材性状有显着影响，但对被子植物的性状没有影响。目前的分析表明，两种主要植物种类之间的木材性状存在系统差异，这表明木本植物在关键功能性状上的进化差异（TSC，RSC）和趋同性（ADD）。

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  • 来源
    《Wood Science and Technology》 |2017年第6期|1405-1419|共15页
  • 作者

    Zhang Meixia; Ji Chengjun; Zhu Jiangling; Wang Xiangping; Wang Donghui; Han Wenxuan;

  • 作者单位

    China Agr Univ, Coll Resources & Environm Sci, Beijing Key Lab Biodivers & Organ Farming, 2 West Yuanmingyuan Rd, Beijing 100193, Peoples R China;

    Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Beijing 100871, Peoples R China;

    Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Beijing 100871, Peoples R China;

    Beijing Forestry Univ, Key Lab Silviculture & Conservat, Minist Educ, Beijing 10083, Peoples R China|Beijing Forestry Univ, Natl Engn Lab Forest Genet & Tree Breeding, Beijing 10083, Peoples R China;

    Peking Univ, Coll Life Sci, Beijing 100871, Peoples R China;

    China Agr Univ, Coll Resources & Environm Sci, Beijing Key Lab Biodivers & Organ Farming, 2 West Yuanmingyuan Rd, Beijing 100193, Peoples R China;

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