拟南芥（Arabidopsis thaliana）种子至幼苗发育中导管分子的发生与连接
he initiation and connection of vessel elements in the seedling of Arabidopsis thaliana (Brassicaceae)
拟南芥发育早期导管分子的发生与连接至今并不十分清楚。本文应用共聚焦激光扫描显微镜观察了野生型拟南芥种子至幼苗发育中导管分子的启动与连接。结果表明：种子萌发后2 h，自第一个启动位点——子叶节区下部启动导管分子的分化，然后向下依次形成下胚轴和根的导管分子，再向上形成了子叶节区中部的导管分子。种子萌发后10 h，自第二个启动位点——子叶叶片中部偏下方启动导管分子的分化，并逐渐完成与子叶节之间的导管分子连接以及子叶叶片羽状环缘脉中导管分子的建成。种子萌发后7 d，由上胚轴-苗区形成的导管分子向下与子叶节区上部形成的导管分子发生连接，至此形成该幼苗轴向和侧向器官中导管分子的完整连接。本研究揭示了拟南芥发育早期导管分子发育的时空性，可为生长素诱导导管分子分化的研究提供佐证。
he initiation and connection of vessel elements in the seedling of Arabidopsis thaliana (Linn.) Heynh. were examined with confocal laser scanning microscopy. The results indicated that vessel elements differentiated first in the lower portion of cotyledon-node zone (CNZ) 2 h after the germination, then extended downwards to hypocotyl and root and upwardly to the middle portion of CNZ . Ten h after the germination, vessel elements developed in the lower portion of cotyledon blade, the second initiating site, connecting gradually with that initiated in cotyledon node and forming pinnate-marginal venation. The connection of vessel elements occurred between the upper portions of CNZ and epicotyl-shoot zone 7 d after the germination. By then , the complete connection of vessel elements in the axial and lateral organs had formed.
孔令安 、周树敏、毕冬玲、汪矛
植物学细胞生物学分子生物学
拟南芥 种子与幼苗 导管分子 发生 连接
rabidopsis seedling vessel element initiation connection.
孔令安 ,周树敏,毕冬玲,汪矛.拟南芥（Arabidopsis thaliana）种子至幼苗发育中导管分子的发生与连接[EB/OL].(2005-11-30)[2025-08-28].http://www.paper.edu.cn/releasepaper/content/200511-489.点此复制
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