Изменение пероксидазной активности в проростках подсолнечника в условиях моделированного водного стресса [Articol]
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Была определена общая активность пероксидазы в листьях 9 генотипов подсолнечника (Helianthus annuus) под воздействием искусственно вызванной засухи с использованием полиэтиленгликоля (ПЭГ). Также были изучены электрофоретические профили изоферментов пероксидазы контрольных и опытных образцов. Наибольшее увеличение активности пероксидазы в условиях сильной засухи продемонстрировали два генотипа (H3 и RF3). При изучении электрофоретических спектров изоферментов пероксидазы исследуемых генотипов подсолнечника было идентифицировано 9 изоформ с молекулярными массами от 42 кДа до 121 кДа. Были обнаружены различные изменения в составе изоферментов (интенсивное накопление одних форм, снижение других, синтез de novo двух изоферментов), различающиеся в зависимости от генотипа и интенсивности водного стресса. Таким образом, под влиянием засухи в листьях подсолнечника происходит изменение активности пероксидазы, а именно стимуляция или ингибирование синтеза отдельных изоферментов.
Total peroxidase activity was determined in leaves of 9 sunflower genotypes (Helianthus annuus L.) under the influence of drought artificially simulated using polyethyleneglycol (PEG). Electrophoretic profiles of peroxidase isoenzymes in control and experimental samples were also studied. The greatest increase in PO activity under severe drought was demonstrated by two genotypes (H3 and RF3). When studying the electrophoretic spectra of peroxidase isoenzymes in the studied sunflower genotypes, 9 isoforms with molecular masses from 42 kD to 121 kD were found. Under the influence of drought, various processes occurred in the isoenzyme composition of peroxidases in different genotypes: several zones were intensively accumulated, the content of another zone slightly decreased, and some zones were synthesized de novo. Consequently, under drought conditions, sunflower seedlings exhibited varying changes in peroxidase activity, including either the stimulation or inhibition of specific isoenzyme synthesis.
Total peroxidase activity was determined in leaves of 9 sunflower genotypes (Helianthus annuus L.) under the influence of drought artificially simulated using polyethyleneglycol (PEG). Electrophoretic profiles of peroxidase isoenzymes in control and experimental samples were also studied. The greatest increase in PO activity under severe drought was demonstrated by two genotypes (H3 and RF3). When studying the electrophoretic spectra of peroxidase isoenzymes in the studied sunflower genotypes, 9 isoforms with molecular masses from 42 kD to 121 kD were found. Under the influence of drought, various processes occurred in the isoenzyme composition of peroxidases in different genotypes: several zones were intensively accumulated, the content of another zone slightly decreased, and some zones were synthesized de novo. Consequently, under drought conditions, sunflower seedlings exhibited varying changes in peroxidase activity, including either the stimulation or inhibition of specific isoenzyme synthesis.
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РУДАКОВА, Анжела; Ала КЕРДИВАРA и Сергей РУДАКОВ. Изменение пероксидазной активности в проростках подсолнечника в условиях моделированного водного стресса. Studia Universitatis Moldaviae. Științe reale și ale naturii. 2025, nr.6(186), pp. 239-246. ISSN 1814-3237. Disponibil: https://doi.org/10.59295/sum6(186)2025_29