Keywords
stages of ontogeny
critical stages in ontogeny
introduction of plants
plant resistance at different stages of their development
spasmodic nature of ontogeny
information-energy concept of plant introduction
How to Cite
Abstract
The historical aspects of studying the stages of individual plant development are considered. The regularities of the change in the stages of ontogeny are discussed. Their different degree of selectivity and sensitivity to certain environmental factors (environmental signals) in different periods of ontogenesis is shown. Concepts of critical periods in the ontogenesis of plants characterized by a decrease in their stability at this stage of development and oppression or lack of regenerative processes in the body are analyzed. The role of P.G. Svetlov as the founder of this trend in science is emphasized. The scheme of formation of critical states in the process of plant development from the positions of combined (total) action of environmental factors is shown. Ideas of spasmodic spiral development of organisms with its transient (revolutionary) and smooth long (evolutionary) stages are discussed. Inter- stage transient periods of ontogeny are considered as the most vulnerable in the life of organisms, which is explained by the large expenditure of energy during the formation of new structures and, as a consequence, the decrease in their stability. Examples of critical periods in plant ontogeny are given. The described regularities of the change in the stages of ontogeny are explained by provisions of the information-energy theory of the development of organisms.
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