通过改进的冷-CLEM和冷-电子断层扫描,对专门的植物细胞壁进行有针对性的成像
J Daraspe1, E Bellani2, D De Bellis1,2
1Electron Microscopy Facility, University of Lausanne, Lausanne, Switzerland.
Nature communications
|December 12, 2025
概括
改进的冷聚焦离子束扫描电子显微镜 (Cryo-FIBSEM) 技术提高了冷灯泡制备的效率. 这些进步使得植物根纳米结构的精确准能够进行详细的成像,而无需脱水器件.
科学领域:
- 电子显微镜电子显微镜
- 植物生物学 植物生物学
- 细胞生物学 细胞生物学
背景情况:
- 低温聚焦离子束扫描电子显微镜 (Cryo-FIBSEM) 对于准备高分辨率成像的低温细菌至关重要.
- 现有的连续提升和SOLIST (对断层扫描的连续上网式提升切割) 方法在速度和效率方面存在局限性.
- 在生物样本中,特别是植物细胞壁中,保留原生水合纳米结构仍然具有挑战性.
研究的目的:
- 介绍一系列对冷-FIBSEM程序的改进,特别是连续提升和SOLIST.
- 为了提高冷兰制备的速度和效率.
- 为了实现植物组织内特定纳米结构的精确准,用于高分辨率成像.
主要方法:
- 将冷-FIBSEM疗程延长到5天.
- 消除了对铜或金块中间体的需求.
- 减少了遮蔽效应,并开发了一种精确的叶片准 (约. 在X/Y/Z中为1μm).
主要成果:
- 在Arabidopsis thaliana根中成功准了卡斯帕的条纹,膜,和膜血管.
- 在大根段内 (长3毫米,厚80-120微米) 达到5微米深度的精确准.
- 观察到显著的等离子膜和细胞壁的保存,尽管一些冰的形成,揭示本地水合纳米结构.
结论:
- 改进的Cryo-FIBSEM工作流程显著提高了制备冷灯泡的效率和精度.
- 这种方法允许前所未有的可视化原生,水合植物细胞壁纳米结构没有脱水文物.
- 该技术为植物根组织复杂的纳米架构提供了宝贵的见解.
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