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首页> 外文期刊>Journal of Arboriculture >Evidence for the downward movement of materials injected into trees
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Evidence for the downward movement of materials injected into trees

机译：注入树木的材料向下运动的证据

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摘要

Movement of xylem-mobile dyes (acid fuchsin, safranin O, and gentian violet) after injecting them into lower stem or root flares was found to occur both upward into the xylem of stems, twigs, and leaves and downward into the xylem of woody roots, atmost times of year when soil temperatures equalled or exceeded 5deg C. Similar patterns of movement of xylem-mobile dyes were observed on the following species tested: American chestnut (Castanea dentata), black birch (Betula lenta), eastern hemlock (Tsugacanadensis), eastern white pine (Pinus strobus), red maple (Acer rubrum), red oak (Quercus rubra), weeping willow (Salix babylonica), white ash (Fraxinus americana), and white birch (Betula alba). Downward movement of dye into root systems involved allages of xylem tissues present within a root, while upward movement was confined to the most recently formed xylem growth ring. Evidence is presented of initial downward dye movement followed by later upward movement within a 12-hour period. The results suggest that xylem-mobile materials injected into trees may be distributed into stem, leaf and root tissues under most growing conditions.
机译：发现将木质部移动性染料（酸性品红，藏红素O和龙胆紫）注入下部茎或根火炬后，其运动既发生在茎，嫩枝和叶片的木质部中，又发生在木质根的木质部中。 ，一年中的大部分时间都是在土壤温度等于或超过5摄氏度时发生的。在以下测试的物种上观察到木质部移动染料的运动方式相似：美洲板栗（Castanea dentata），黑桦木（Betula lenta），东部铁杉（Tsugacanadensis） ，东部白松（Pinus strobus），红枫（Acer rubrum），红橡树（Quercus rubra），垂柳（Salix babylonica），白灰（Fraxinus americana）和白桦（Betula alba）。染料向根系统的向下移动涉及根中存在的木质部组织的所有结节，而向上移动则限于最近形成的木质部生长环。出现的证据是染料在12小时内开始向下移动，随后向上移动。结果表明，在大多数生长条件下，注入树木的木质部可移动材料可能分布在茎，叶和根组织中。

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