THE MECHANISM OF FORMATION OF A SYSTEM OF SECONDARY CONCENTRIC MEMBRANES IN HIGHER AQUATIC PLANTS UNDER THE ACTION OF TOXIC SUBSTANCES ON THE EXAMPLE OF LÉMNA MINOR L.

Abstract

It’s hard to imagine that such difficult structure as cell membrane can be restored, вut it is restored through the formation of secondary concentric membrane. The ability of many organisms to regenerate partial breaks in their cell membrane has been well studied [16; 18; 19]. When cells are damaged, they quickly repair damage in the membrane, forming one or more insoluble plugs. These insoluble plugs are composed of lipids and polysaccharides to prevent loss of cytoplasm content. Over time, the cells restore their original volume and shape. [20; 21]. Given the large size of the cells, it should be understood that these breakdowns can be many. Other processes associated with the formation of a system of secondary concentric membranes are involved here [9]. Our results shows that secondary membrane isn’t temporary, it’s functions are the same as primary cell membrane and it’s formation takes just few hours. In this investigation we offer full description of the fact how secondary concentric membrane is formed, also stages of this process and meaning during adaptation. A complete explanation of how these cells repair the damaged membrane, including the cell wall, remains to be determined. Therefore, the purpose of this article was to study the processes of formation of the secondary concentric membrane and cell wall on the example of higher aquatic plants Lémna minor L. Cell wall regeneration can be an important model for studying processes such as the interaction of various cellular organelles, the formation of different types of hybrid cells and especially, the evolution of cell membranes. In the spontaneous regeneration of the cell wall, four main stages can be distinguished: 1) Protoplast formation; 2) Pseudo-protoplast formation; 3) cell wall synthesis; 4) formation of a secondary concentric membrane.