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首页> 外文期刊>Ecological research >Relationship between the timing of vessel formation and leaf phenology in ten ring-porous and diffuse-porous deciduous tree species
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Relationship between the timing of vessel formation and leaf phenology in ten ring-porous and diffuse-porous deciduous tree species

机译：10种环状多孔和分散多孔落叶树种的血管形成时间与叶片物候的关系

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摘要

The goal of this study is to clarify how different aspects of plant function are coordinated developmen-tally for species of ring-porous versus diffuse-porous deciduous trees, comparing the timing of leaf phenology and vessel formation in twigs and stems from an eco-physiological viewpoint. Cylindrical stem cores and twigs were collected at intervals from early spring through summer from five ring-porous and five diffuse-porous species in a cool temperate forest, and leaf and vessel formation were observed simultaneously. We found that the first-formed vessels of the year were lig-nified in twigs around the time of leaf appearance and at or before full leaf expansion of each tree in both groups of species with flush-leaves. Vessels in stems were ligni-fied 2 weeks before to 4 weeks after leaf appearance and before or around full leaf expansion of the tree in ring-porous species. This was significantly earlier than in diffuse-porous species, in which stem vessel lignification was 2-8 weeks after leaf appearance and at or after full leaf expansion of the tree. The timing of vessel formation in twigs compared to stems was significantly earlier in ring-porous species than in diffuse-porous species. Lignification of vessels in stems occurred within 2 weeks of lignification in the twigs of ring-porous species and 2-8 weeks after lignification in twigs of diffuse-porous species. These results indicate the order and time-lag of leaf and vessel formation. Ring-porous species showed intensive leaf/vessel production, whereas diffuse-porous species showed less intensive leaf/vessel production.
机译：这项研究的目的是通过比较生态生理学中树枝和茎的叶片物候和脉管形成的时间，以阐明环孔和散孔落叶树种的植物功能的不同方面是如何协调发展的。观点。从早春到夏季，从凉爽的温带森林中的五个环状多孔物种和五个分散多孔物种中采集圆柱茎核和细枝，同时观察到叶片和容器的形成。我们发现，在两组出现潮叶的物种中，当年叶片的出现时间以及在每棵树的全叶展开之前或之后，今年的第一批容器在树枝中被木质化。在叶片出现前2周至4周后，以及在环状多孔物种的全叶展开之前或周围，对茎中的容器进行木质化处理。这明显早于散孔性物种，在后者中，叶片出现后以及树木全叶扩张时或之后，干血管木质化时间为2-8周。与细枝相比，在细孔中，细枝形成血管的时间要早​​于在细孔中。环状多孔物种的树枝在木质化的两周内发生茎中血管的木质化，而分散多孔物种的树枝在木质化后的2-8周发生木质化。这些结果表明叶片和容器形成的顺序和时滞。环孔菌种显示出密集的叶/血管生成，而散孔菌种显示出密集的叶/血管生成。

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  • 来源
    《Ecological research》 |2013年第4期|615-624|共10页
  • 作者

    Sayaka Takahashi; Naoki Okada; Tadashi Nobuchi;

  • 作者单位

    Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Oiwake-cho, Kitashirakawa,Sakyo-ku, Kyoto 606-8502, Japan;

    Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Oiwake-cho, Kitashirakawa,Sakyo-ku, Kyoto 606-8502, Japan;

    Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Oiwake-cho, Kitashirakawa,Sakyo-ku, Kyoto 606-8502, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Porosity; Leaf-emergence pattern; Vessel phenology; Functional ecology;

    机译：孔隙率叶出芽模式;血管物候功能生态学;

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