The Participation of Wall Monolignols in Leaf Tolerance to Nature Flooding of Hydrophytes

The comparative analysis of the monolignols localization in epidermis, photosynthesizing parenchyma and vessels walls of Myriophyllum spicatum, Potamogeton pectinatus and P. perfoliatus submerged leaves carried out on the basis of cytochemical method and laser confocal microscopy. The images of quantitative distribution of syringyl and guaiacyl in the cell walls were obtained at cellular level depending on the type of leaf tissues and plant species. The increase of relative content of monolignols was established in walls of vessels and in the corners of parenchyma cells. Cytochemical analysis indicates that ratio of syringyl/guaiacyl in leaf tissues changes depending on species. The role of of syringyl and guaiacyl monolignols in the cellular mechanisms of adaptation to nature flooding is discussed.