Abstract
Studies have been carried out to determine the calendar age of plants of the invasive species Hogweed Sosnovsky (Heracleum sosnowskyi Manden.). The study of the root structure showed the presence of growth rings formed by increments of secondary xylem, which makes it possible to use the xylochronological approach to estimate the calendar age of H. sosnowskyi. The number of xylem rings on the transverse section of the root corresponds to the number of remnants of annual increments on the longitudinal section of the underground caudex. The method of accounting for annual increments on a longitudinal section of the caudex is simple and effective and allows you to determine the age of plants of H. sosnowskyi in the field, without resorting to tissue contrast and microscopy. Plants of H. sosnowskyi in natural cenopopulations of the middle taiga zone of the Komi Republic, started flowering in the third year of life, and their calendar age reached 7 full years.
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ACKNOWLEDGMENTS
The authors are grateful to Director of the Institute of Biology, Federal Research Center, Komi Scientific Center, Ural Branch, Russian Academy of Sciences, Ph.D. I.F. Chadin for discussing the results of the study and to highly respected reviewers for constructive suggestions in preparing the manuscript.
Funding
This study was performed within the framework of research, design, and engineering works, project no. 122040600021-4 “Photosynthesis, Respiration, and Bioenergetics of Plants and Phototrophic Organisms Biophysiochemical, Molecular Genetic, and Ecological Aspects” and the Russian Foundation for Basic Research, project no. 20-54-18002 Bolg_a of “Modeling Potential Distribution Ranges of Invasive Species Heracleum sosnowskyi and Heracleum mantegazzianum in Eastern Europe.”
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Dalke, I.V., Maslova, S., Plyusnina, S.N. et al. A New Method for Determining the Calendar Age of Plants of Heracleum sosnowskyi and Evaluation based on the Age Composition in Cenopopulations of the Species in the North. Russ J Ecol 54, 221–228 (2023). https://doi.org/10.1134/S1067413623030013
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DOI: https://doi.org/10.1134/S1067413623030013