茄子NAC域转录因子SmNST1作为激活剂促进了二次细胞壁的加厚
Jiali Wang1,2, Xinxin Zhang1,2, Huiqin Yang1,2
1College of Horticulture and Landscape Architecture, Southwest University, Chongqing, China.
Plant, cell & environment
|July 4, 2024
概括
茄子NAC转录因子SmNST1和SmNST2调节二次细胞壁 (SCW) 的形成. SmNST1通过上调SCW生物合成基因来促进SCW的加厚,从而增强植物的结构完整性.
科学领域:
- 植物分子生物学 植物分子生物学
- 植物遗传学 植物遗传学
- 生物化学 生化学
背景情况:
- 二次细胞壁 (SCW) 对植物结构,运输和应激反应至关重要.
- NAC转录因子 (TF) 是植物中SCW生物合成的关键调节者.
- 茄子中的SCW形成机制在很大程度上仍未被描述.
研究的目的:
- 研究茄子NACTFs,SmNST1和SmNST2在SCW生物合成中的作用.
- 阐明在茄子中SCW形成调节的基础分子机制.
主要方法:
- 从茄子中克隆SmNST1和SmNST2.
- 亚细胞局部化,基因表达分析和转基因烟草中的过度表达.
- 蛋白质与蛋白质相互作用试验 (BiFC,LCI).
- DNA结合测定 (Y1H,EMSA) 和报告测定 (DLR).
主要成果:
- SmNST1和SmNST2在茄子根和茎中高度表达,并定位到细胞膜和细胞核中.
- 烟草中SmNST1的过度表达增强了SCW的厚度,并调节了SCW生物合成基因 (纤维素,西兰,红素).
- SmNST1 与 SmNST2 相互作用.
- SmMYB26激活了SmNST1的表达,而SmNST1/SmNST2则抑制了SmMYB108的表达.
结论:
- SmNST1积极调节茄子中的SCW形成.
- 这些发现有助于理解SCW生物合成的转录调节.
- 这项研究揭示了NAC TFs和MYB TFs在SCW发展中的相互作用.
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