Regenerative and photosynthetic activity of grape varieties during salinisation of medium
https://doi.org/10.18470/1992-1098-2025-3-11
Abstract
Aim. To study the stress resistance of grape varieties by evaluating their growth parameters, pigment composition and photosynthetic activity under conditions of NaCl salinity.
Measurement of growth and regeneration parameters in grape cuttings under salt stress, determination of photosynthetic pigment content by spectrophotometry and measurement of fluorescence by PAM – fluorometry.
The Augustine variety was characterizsed by the highest growth and regeneration rates of cuttings under salt stress (100 mM NaCl). The maximum amount of chlorophylls a and b was found in Agadai and Moldova varieties. Studies of the fluorescent parameters made it possible to assess the sensitivity of the photosynthetic apparatus (PSA) to the effects of stress factors. The intensification of the photochemical output of photosystem 2 (FS2) observed, indicates the effective operation of protective mechanisms and the implementation of which leads to stability during salinity. High rates of photosynthesis intensity (Y (II)) correlated with the rate of electron transfer along the electron transport chain. In the Augustine variety, the relative speed of electronic transport of the experimental and control samples coincided, in the Rkatsiteli variety they exceeded the control values by 30% and in the Agadai and Moldova varieties they were inferior to them.
Overall, changes in the content of photosynthetic pigments and the efficiency of the work of the photosynthetic apparatus and productivity indicate the resistance of the studied varieties to salinisation conditions.
Supporting agencies: The authors express their gratitude to the staff of the Dagestan Breeding Experimental Station for Viticulture and Vegetable Growing and personally to Dr. Kazakhmedov Ramidin Efendievich for the material provided for research and for their valuable advice.
About the Authors
K. K. Mamedova
Dagestan State University
Russian Federation
Competing Interests:
Russian Federation
Kalimat K. Mamedova - Chief Lecturer, Faculty of Biology
Competing Interests:
The authors declare no conflict of interest.
E. V. Vlasova
Caspian Institute of Biological Resources, Russian Academy of Sciences
Russian Federation
Competing Interests:
Russian Federation
Elena V. Vlasova
Makhachkala
Competing Interests:
The authors declare no conflict of interest.
Z. M. Alieva
Dagestan State University
Russian Federation
Competing Interests:
Russian Federation
Zarina M. Alieva
Makhachkala
Competing Interests:
The authors declare no conflict of interest.
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For citations:
Mamedova K.K., Vlasova E.V., Alieva Z.M. Regenerative and photosynthetic activity of grape varieties during salinisation of medium. South of Russia: ecology, development. 2025;20(3):122-132. (In Russ.) https://doi.org/10.18470/1992-1098-2025-3-11
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