Indicators of the water regime of some varieties of chrysanthemums in the conditions of the South Ural

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Abstract

In introduction studies, it is of great importance to determine how favorable the water balance of the studied species is under given environmental conditions. The aim of the research was to study the water regime of some varieties of chrysanthemums in the conditions of the Southern Ural. The study was conducted in 2018–2020 on the basis of the South-Ural Botanical Garden-Institute of the Ufa Federal Research Centre of Russian Academy of Sciences. The objects of the study were 23 varieties of Chrysanthemum × hortorum Bailey. In the course of the research, the total water content, water-holding capacity, the content of mobile moisture, water deficit, and sublethal water deficit were determined. The analysis of water regime indicators is based on the method of artificial wilting (V.N. Tarenkov, L.N. Ivanova) and the method of saturation of plant samples (V.P. Moiseev, N.P. Reshetsky). Sublethal water deficit was determined by the method of T.K. Goryshina, L.I. Samsonova, modified by N.I. Bobrovskaya. The calculations were carried out by standard methods using statistical packages of the Microsoft Excel 2003 and the Agros 2.13 program. The studies made it possible to determine the value of the sublethal water deficit (28,4%) for the varieties of chrysanthemums in the conditions of the Bashkir Ural. It was found that the studied varieties during the growing season did not experience such a moisture deficit in the tissues that could lead to irreversible damage to the assimilating organs. Our experiments showed that chrysanthemum varieties in the Bashkir Cis-Ural under the same soil-climatic and agrotechnical conditions had the following range of indicators of total water content 70,0–90,4% and water-holding capacity 19,00–64,6%. The analysis of variance revealed significant differences between water-holding capacity and the content of mobile moisture by varieties, the share of influence was 27,85–31,71%. As a result of the correlation-regression analysis, the authors revealed a direct dependence of the indicators of mobile moisture content on the total water content, and an inverse one – on the indicators of the content of mobile moisture and water-holding capacity.

About the authors

Svetlana Galimullovna Denisova

South-Ural Botanical Garden-Institute of the Ufa Federal Research Centre of Russian Academy of Sciences

Author for correspondence.
Email: svetik-7808@mail.ru

candidate of biological sciences, senior researcher of Introduction and Selection of Floral Plants Laboratory

Russian Federation, Ufa

Antonina Anatolyevna Reut

South-Ural Botanical Garden-Institute of the Ufa Federal Research Centre of Russian Academy of Sciences

Email: cvetok.79@mail.ru

candidate of biological sciences, leading researcher of Introduction and Selection of Floral Plants Laboratory

Russian Federation, Ufa

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2. Figure 1 - Dynamics of indicators of the total water content of some varieties of chrysanthemums (on average for 3 years)

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3. Figure 2 - Dynamics of indicators of water-holding capacity of some varieties of chrysanthemums (on average for 3 years)

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4. Figure 3 - Dynamics of indicators of mobile moisture content of some varieties of chrysanthemums (on average for 3 years)

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5. Figure 4 - Dynamics of indicators of water deficiency of some varieties of chrysanthemums (on average for 3 years)

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6. Figure 5 - Sublethal water deficit and average values of natural water deficit in the leaves of some varieties of chrysanthemums during the observation period

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7. Figure 6 - Dependence of the mobile moisture content on the total water capacity (A) and on the water-holding capacity (B) in the studied varieties of the YUBSI UFIC RAS collection

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Copyright (c) 2021 Denisova S.G., Reut A.A.

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