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CuZn-超氧化物脱酶在微型树中通过三种非生物应力在本地化和表达方面受到差异性修饰

Philippe Michonneau¹, Pierrette Fleurat-Lessard², Gabriel Roblin²

¹SCARA, Zone Industrielle de Villette, 10700 Arcis-sur-Aube, France; ImageUP, Plate-forme d'imagerie de l'Université de Poitiers, Pôle Biologie Santé, 1 rue Georges Bonnet, Bât. B37, TSA 51106, 86073 Poitiers Cedex 9, France.

Micron (Oxford, England : 1993)

|September 1, 2023

概括

像铜应用,机械摩擦和缺水等非生物应激会激活树中的超氧化物脱酶 (SOD). 这种酶在血管相关细胞 (VACs) 中的化和适应反应中发挥着关键作用.

科学领域:

植物生理学植物生理学
生物化学生物化学
细胞生物学细胞生物学

背景情况:

无生物应激显著影响植物生理学和发育.
超氧化物脱酶 (SOD) 是控制氧化应激的关键酶.
血管相关细胞 (VACs) 对于植物血管功能至关重要.

研究的目的:

为了研究CuZn-超氧化物脱酶 (SOD) 在微型树中对非生物应激的反应中的作用.
在各种压力条件下阐明SOD异型体的局部化和差异表达.
了解VAC及其转移装置在植物应力适应中的参与.

主要方法:

在微型树上施加三种非生物应力:铜施加 (CS),机械摩擦 (MS) 和缺水 (WS).
免疫检测和传输电子显微镜 (TEM) 具有免疫黄金标签,以识别SOD蛋白位址.
对转移装置和细胞壁组成 (非甲基化pectins) 的变化进行分析.
基于分子重量的SOD异型的差异表达分析.

主要成果:

CS,MS和WS特别激活了CuZn-SOD表达,SOD蛋白被检测到花,变形体和树脂体的线性细胞中.
SOD定位在VACs的各种细胞区内,包括线粒体,塑体和血膜.
无生物应力增加了VAC坑场的转移装置体积,在CS和MS之后观察到非甲基化pectins的增加.
根据所施加的特定应力观察到SOD异型 (15,17,20kDa) 的差异表达.

结论:

VAC在微型树对非生物应激的适应性反应中发挥着关键作用,通过增加它们的转移装置.
在压力条件下的差异性SOD局部化和表达突出了其在VAC中的调节功能.
这些发现强调了SOD和VAC在维护树功能和植物适应环境挑战方面的重要性.

关键词:

在Cu/Zn-超氧化物脱酶.氧化应激是一种氧化应激.树,树,树的树.SOD免疫定位的免疫定位方法

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