<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The paper deals with peculiar features of development of the species <italic>Veronica</italic> L. in the conditions of the steppe zone of Ukraine (central part of the country). Under the action of climatic changes occurring for the last 20 years, the species began to grow 6–14 days earlier and increased the vegetation period by 15–25 days. Under the effect of extreme growing conditions (hot weather and drought) decrease in the area of the leaf blade by almost 2 times was recorded in <italic>V. prostrata</italic> and <italic>V. incana</italic>. Length and width of the leaf in <italic>V. prostrata</italic> and <italic>V. incana</italic> decreased by 20–30%, but in <italic>V. austriaca</italic> ssp. <italic>teucrium</italic> a decrease was observed for the leaf width only while its length increased by 17%. Analysis of correlation of climatic factors (air temperature, precipitation amount) to the morphometric parameters of the leaf during seasonal development showed greater dependence of their value on the air temperature, which was confirmed by the inverse correlation coefficients (r = -0.55–-0.66). In the unfavorable growing conditions, the features of formation of the underground part of species are manifested in the inhibited development of underground shoots (by 80–85%) and stimulation of branching and increase in the length of thin sucking roots (1.5 times). Studied species of the genus <italic>Veronica</italic> in the climatic conditions of the steppe zone of Ukraine go through all stages of phenological development and are marked by rather wide range of phenotypic changes in the vegetative sphere.</p></abstract>

The paper deals with peculiar features of development of the species Veronica L. in the conditions of the steppe zone of Ukraine (central part of the country). Under the action of climatic changes occurring for the last 20 years, the species began to grow 6–14 days earlier and increased the vegetation period by 15–25 days. Under the effect of extreme growing conditions (hot weather and drought) decrease in the area of the leaf blade by almost 2 times was recorded in V. prostrata and V. incana. Length and width of the leaf in V. prostrata and V. incana decreased by 20–30%, but in V. austriaca ssp. teucrium a decrease was observed for the leaf width only while its length increased by 17%. Analysis of correlation of climatic factors (air temperature, precipitation amount) to the morphometric parameters of the leaf during seasonal development showed greater dependence of their value on the air temperature, which was confirmed by the inverse correlation coefficients (r = -0.55–-0.66). In the unfavorable growing conditions, the features of formation of the underground part of species are manifested in the inhibited development of underground shoots (by 80–85%) and stimulation of branching and increase in the length of thin sucking roots (1.5 times). Studied species of the genus Veronica in the climatic conditions of the steppe zone of Ukraine go through all stages of phenological development and are marked by rather wide range of phenotypic changes in the vegetative sphere.

Features of development of species of the genus <italic>Veronica</italic> L. in the conditions of steppe zone of Ukraine

Hacquetia

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Features of development of species of the genus  L. in the conditions of steppe zone of Ukraine

The paper deals with peculiar features of development of the species Veronica L. in the conditions of the steppe zone of Ukraine (central part of the country)....

Features of development of species of the genus Veronica L. in the conditions of steppe zone of Ukraine

Published Online: Feb 12, 2022

Page range: 223 - 233

Received: Jun 16, 2021

Accepted: Nov 23, 2021

DOI: https://doi.org/10.2478/hacq-2021-0025

Keywords
species of the genus L., climatic changes, Steppe of Ukraine, phenological development, leaf morphology, assemblage of rootlets

© 2022 Tatiana Chypyliak et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Features of development of species of the genus Veronica L. in the conditions of steppe zone of Ukraine

Published Online: Feb 12, 2022

Page range: 223 - 233

Received: Jun 16, 2021

Accepted: Nov 23, 2021

DOI: https://doi.org/10.2478/hacq-2021-0025

Keywordsspecies of the genus L., climatic changes, Steppe of Ukraine, phenological development, leaf morphology, assemblage of rootlets

© 2022 Tatiana Chypyliak et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
species of the genus L., climatic changes, Steppe of Ukraine, phenological development, leaf morphology, assemblage of rootlets