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拟南芥种子至幼苗发育中导管分子的发生与连接 被引量:1

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摘要 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.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2h,自第1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10h,自第2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7d,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.
出处 《科学通报》 EI CAS CSCD 北大核心 2005年第17期1858-1862,共5页 Chinese Science Bulletin
基金 国家自然科学资金(批准号:30370084) 教育部博士点基金(批准号:20020019034) 中国科学院植物研究所系统与进化植物学重点实验室资助项目.
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