植物组织细胞壁的特化与功能的适应

Adapting the Specilization of Cellwall in the Plant Tissue to the Functions

植物组织细胞壁结构和成分的特化是细胞长期进化过程中与功能相适应的结果。表皮细胞细胞壁的角质化及角质层、周皮木栓层细胞的栓质化,使表皮、周皮具有防止水分过度蒸发、阻止病虫害侵入的保护功能。厚角组织和厚壁组织细胞壁不同程度、不同成分的加厚,是机械组织在植物体不同发育阶段与功能的适应。穿孔、筛板等细胞壁结构的特化以及细胞壁的木质化充分体现了输导组织的功能特点。

The specilization of cell's structure and ingredient in the mature tissue is the result of cells adaptability to their functions in a long period of evolution. Because of the cutide and the cutinication of the cell wall in epidermis, the phellemmication of the cell in phellogen of periderm, the epidermis and the periderm have the protective function of preventing the moisture from escaping and the injurous insects out of it . The thickening of the collenchyma and the sclemchyma in different degree and different ingredient are the adaptability of mechanical tissue in plant to the functions in different growth stages. It reflects functional peculiarity of conducting tissue by the lignification of cell wall and the specialization of the structure of cell wall in perforation,sieveplate ect.