Vestnik of Orenburg State Pedagogical University. Electronic Scientific Journal. 2024. № 1 (49). P. 168—179

 

BIOLOGICAL SCIENCES

Original article

UDC 581.5

DOI: https://doi.org/10.32516/2303-9922.2024.49.8

Structural and functional changes in the assimilation apparatus of annual ornamental plants in urbanized environment

Elena V. Sarbaeva, Candidate of Biological Sciences, Associate Professor
Mari State University, Yoshkar-Ola, Russia, sarbaevaev@mail.ru, https://orcid.org/0000-0001-7274-0938

 

Abstract

The article examines changes in a number of indicators of the assimilation apparatus of ornamental annual plants Salvia splendens Sellow ex Schult and Petunia×hybrida hort. ex E. Vilm, growing in various functional zones of Yoshkar-Ola (recreational, residential, industrial). Such indicators as the thickness of upper and lower epidermis, the height of the columnar and spongy parenchyma were studied, the number of stomata on the lower epidermis was calculated, and indicators of water metabolism were studied — the intensity of transpiration and the content of total water in tissues. It has been established that two species with similar ecological requirements for the habitat react differently to the influence of an urbanized environment. P. hybrida showed the thinning of upper epidermis in areas with greater anthropogenic load, while the thickness of lower epidermis remained virtually unchanged. At the same time, the height of the columnar parenchyma significantly decreased, the number of stomata increased, and the content of total water decreased significantly. S. splendens demonstrated significant changes in thickness of lower epidermis in an anthropogenically transformed environment, the intensity of transpiration decreased significantly, but the indicators of tissue hydration were more stable.

Key words

Urban environment, ornamental annual plants, phytoindication, leaf mesostructure, tissue water content.

For citation:

Sarbaeva E. V. Structural and functional changes in the assimilation apparatus of annual ornamental plants in urbanized environment. Vestnik of Orenburg State Pedagogical University. Electronic Scientific Journal, 2024, no. 1 (49), pp. 168—179. DOI: https://doi.org/10.32516/2303-9922.2024.49.8.

The full text of the article PDF (Russian)

 

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