首页> 外文期刊>Nature >APL regulates vascular tissue identity in Arabidopsis
【24h】

APL regulates vascular tissue identity in Arabidopsis

机译:APL调节拟南芥中的血管组织身份

获取原文
获取原文并翻译 | 示例
           

摘要

Vascular plants have a long-distance transport system consisting of two tissue types with elongated cell files, phloem and xylem. Phloem has two basic cell types, enucleate sieve elements and companion cells. Xylem has various lignified cell types, such as tracheary elements, the differentiation of which involves deposition of elaborate cell wall thickenings and programmed cell death. Until now, little has been known about the genetic control of phloem-xylem patterning. Here we identify the ALTERED PHLOEM DEVELOPMENT (APL) gene, which encodes a MYB coiled-coil-type transcription factor that is required for phloem identity in Arabidopsis. Phloem is established through asymmetric cell divisions and subsequent differentiation. We show that both processes are impaired by a recessive apl mutation. This is associated with the formation of cells that have xylem characteristics in the position of phloem. The APL expression profile is consistent with a key role in phloem development. Ectopic APL expression in the vascular bundle inhibits xylem development. Our studies suggest that APL has a dual role both in promoting phloem differentiation and in repressing xylem differentiation during vascular development.
机译:血管植物具有由两种组织类型组成的长途运输系统,其中两种组织具有细长的细胞膜,韧皮部和木质部。韧皮部具有两种基本的细胞类型,去核筛分元件和陪伴细胞。木质部具有各种木质化的细胞类型,例如气管元件,其分化涉及复杂的细胞壁增厚的沉积和程序性的细胞死亡。到目前为止,对韧皮部-木质部模式的遗传控制了解甚少。在这里,我们确定了ALTERED PHLOEM DEVELOPMENT(APL)基因,该基因编码拟南芥中韧皮部同一性所需的MYB卷曲螺旋型转录因子。韧皮部通过不对称细胞分裂和随后的分化而建立。我们显示这两个过程都受到隐性apl突变的影响。这与在韧皮部位置具有木质部特征的细胞的形成有关。 APL表达谱与韧皮部发育中的关键作用一致。血管束中的异位APL表达抑制木质部发育。我们的研究表明,APL在促进韧皮部分化和抑制血管发育过程中木质部分化方面均具有双重作用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号