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Information × Registration Number 0225U001246, (0120U000023) , R & D reports Title Cellular and molecular mechanisms of the phenotypic plasticity of psamophytes and gelophytes under contrasting water conditions. popup.stage_title Клітинні та молекулярні механізми фенотипічної пластичності псамофітів та геліофітів уконтрастних умовах водного режиму. Head Kordium Yelyzaveta L., чл.-кор. НАНУ Registration Date 28-01-2025 Organization M.G.Kholodny Institute of Botany NASU popup.description1 popup.description2  The results of comprehensive studies of psammophytes Corynephorus canescens, Secale sylvestre, Alyssum desertorum and helophyte Phragmites australis, which grew under different water supply in natural ecotopes and in experiment, using light, electron and confocal microscopy, cytochemistry, biochemistry, molecular biology and statistics, are presented. A significant difference in phenotypic plasticity of selected plant groups in terms of structural, physiological and biochemical characteristics during changes in the water regime was demonstrated. It was shown that the sensitivity of psammophytes to soil flooding is due to the inability to long-term structural and metabolic adaptation, primarily the formation of root aerenchyma. However, they have species-specific cellular and molecular mechanisms that ensure plant survival during several weeks of flooding. Structural changes include an increase in air cavities in the leaves, length and branching of trichomes, size of surface wax structures, content of silicon on the epidermal surface, changes in the ultrastructural organization of the mesophyll cells, which indicate restructuring of the photosynthetic apparatus, a decrease in respiratory activity and appearance of signs of autophagy. The systemic response of psammophytes to root hypoxia includes a decrease in the efficiency of photosynthesis, activation of signaling systems, defense mechanisms and anaerobic metabolism. The wide plasticity of the helophyte P. australis was shown to include formation of a developed aerenchyma of the schizogenic type, which is associated with a violation of the reticular organization of actin filaments, as well as changes in the leaf micromorphology, content and localization of lignin and silicon. The implementation of the project is related to the task of developing criteria for assessing the resistance of wild and agricultural plants to adverse changes in environmental factors. Product Description popup.authors Akimov Yurii M. Artemenko Olha A. Bobrovnytskyi Yurii A. Brykov Vasyl O. Herashchenko Bohdan I. Zaslavskyi Viktor A. Kozeko Liudmyla Ye. Nedukha Olena M. Ovrutska Iryna I. Ovcharenko Yuliia V. Palladina Tetiana О. Polishchuk Oleksandr V. Shevchenko Halyna V. popup.nrat_date 2025-01-28 Close