Molecular mechanism of root cap differentiation and functional expression

根冠分化的分子机制及功能表达

• 批准号: 21570042
• 负责人: NAKAJIMA Keiji
• 金额: $ 3万
• 依托单位: Nara Institute of Science and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21570042/
• 关键词: パターン形成; 分裂組織; 根; 根冠; 植物; 細胞分化; 転写因子; 遺伝子

Root cap has several important functions, such as protection of root meristem from surrounding environment and the gravity sensing. We had identified the Arabidopsis NAC transcription factor, SOMBRERO(SMB), as a key regulator of root cap differentiation and maturation. Microarray analysis identified, more than 20 genes that act downstream of SMB in the root cap. These genes included two other NAC transcription factor genes SBL1 and SBL2, as well as genes involved in lipid and polysaccharide metabolism and those encoding secreted proteins. Reporter analysis revealed that they were indeed expressed specifically in the outer layers of root cap, supporting the notion that SMB acts in root cap differentiation by regulating these downstream genes.

根冠具有保护根分生组织不受外界环境影响和感应重力等重要功能。我们已经确定了拟南芥NAC转录因子，SOMBRERO（SMB），作为一个关键的调节根冠分化和成熟。微阵列分析确定了超过20个基因在根冠中的SMB下游起作用。这些基因包括另外两个NAC转录因子基因SBL 1和SBL 2，以及参与脂质和多糖代谢的基因以及编码分泌蛋白的基因。报道者分析显示，它们确实在根冠的外层特异性表达，支持SMB通过调节这些下游基因在根冠分化中起作用的观点。

项目成果

NAC転写因子SOMBREROは根冠分化を促進する

NAC转录因子SOMBRERO促进根冠分化

• 发表时间: 2010
• 作者: 中島敬二;中西美耶子;磯本淳志;橋本隆
• 通讯作者: 橋本隆