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.

根帽具有多种重要功能，例如保护根生组织免受周围环境和重力感应的保护。我们已经确定了拟南芥NAC转录因子Sombrero（SMB），它是根帽分化和成熟的关键调节剂。微阵列分析确定了20个以上的基因，这些基因在根帽中向下游作用。这些基因包括其他两个NAC转录因子基因SBL1和SBL2，以及涉及脂质和多糖代谢的基因以及编码分泌的蛋白质的基因。记者分析表明，它们确实是在根帽的外层中特别表达的，这支持了SMB通过调节这些下游基因而在根帽分化中作用的概念。

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