Page 36 - 《广西植物》2020年第4期
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4 7 4                                 广  西  植  物                                         40 卷





















































    1-9. 半薄切片ꎻ 1-5. 根中中柱鞘起源的分泌道发育ꎻ 6-8. 根中韧皮部起源的分泌道发育ꎮ 1. 中柱鞘起源的原始细胞(黑色虚
    线圆圈)ꎻ 2. 分泌道形成小的腔隙(黑色虚线圆圈)ꎻ 3. 分泌道(黑色虚线圆圈)邻近细胞的插入(白色箭头)ꎻ 4. 分泌道(黑色虚
    线圆圈)腔道增大ꎬ分泌细胞分裂(黑色箭头)及邻近细胞插入(白色箭头)ꎻ 5. 皮层内成熟的分泌道(黑色箭头)ꎻ 6. 次生韧皮部
    中早期分泌道(黑色虚线圆圈)ꎻ 7. 分泌道腔道增大(黑色虚线圆圈)ꎻ 8. 次生韧皮部中成熟的分泌道(黑色虚线圆圈)ꎻ 9. 相邻
    分泌道之间联通形成大的分泌道(黑色箭头)ꎻ 标尺 = 12 μmꎮ
    1-9. Semi ̄thin sectionsꎻ 1-5. Pericycle originates from the development of the secretory canalsꎻ 6-8. Phloem originates from the development
    of the secretory canals. 1. Origin of the pericycle from the primary cells (black dotted circle)ꎻ 2. Small lumen in the secretory canals (black
    dotted circle)ꎻ 3. Secretory canals form a small lumen (black dotted circle)ꎬ the insertion of adjacent cells (white arrow)ꎻ 4. Increased lumen
    in secretory canals (black dotted circle)ꎬ the division of the secretory cells (black arrow)ꎬ the insertion of adjacent cells (white arrow)ꎻ
    5. Mature secretory canals in the cortex (black arrow)ꎻ 6. Origin of the phloem from the secretory canals in the early stage (black dotted cir ̄
    cle)ꎻ 7. Increased lumen of secretory canals (black dotted circle)ꎻ 8. Mature secretory canals in secondary phloem (black dotted circle)ꎻ
    9. Adjacent secretory canals connect to form a large secretory canal (black arrow)ꎻ Bar = 12 μm.
                                 图版 Ⅰ  杭白芷根中分泌道的发生和分布
            PlateⅠ  Occurrence and distribution of secretory canals in root of Angelica dahurica var. formosana


   此时ꎬ在皮层和次生韧皮部中都存在邻近两个或                             轮排列ꎬ中柱鞘起源的分泌道位于皮层ꎬ靠近周
   多个分泌道彼此联通形成一个大的分泌道的现象                             皮ꎬ呈间隔均匀的一圈排列ꎬ腔道较大ꎬ韧皮部起
   (图版Ⅰ:9)ꎮ 在成熟根的横切面上ꎬ分泌道呈多                          源的分泌道位于次生韧皮部ꎬ靠近中心ꎬ二到三圈
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