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0216U003098,
0115U003617
,
Cellular and molеcular mehanisms of regulation of photosynthesis in biotechnologic plants resistant to abiotic stress
Stasik Oleg,
13-01-2016
Institute of Plant Physiology and Genetics NASU
The structural and functional features of the photosynthetic apparatus and its responses to drought and elevated temperature in plants of inbred line of sunflower, transformed by prolin dehydrogenase gene suppressor, T3VK-121 comparing to the original line VK-121 were clarified. It is established that under optimum conditions the transformed plants did not differ in the intensity of CO2 assimilation and transpiration, but had lower activity photo- and dark respiration, lower content of chlorophyll a and the ratio of chlorophyll a/b, and significantly higher activity of antioxidant enzymes superoxide dismutase and in ascorbate peroxidase in chloroplasts. Soil drought equally inhibited the rate of photosynthesis in both forms, but in transformed plants under drought conditions the transpiration and respiration rates dropped less, deepoxidation state of xanthophyll cycle pigments was lower, the activity of antioxidant enzymes increased less. The temperature increase inhibited the rate of leaf photosynthesis and enhances the secondary oxidative stress effects stronger in the leaves of plants of original line than in the transformed plants.
Бавол Андрій Васильович
Кірізій Дмитро Анатолійович
Міхно Алла Іванівна
Осипова Оксана Леонідівна
Поліщук Ганна Іванівна
Прядкіна Галина Олексіївна
Рижикова Поліна Львівна
Ситник Сергій Костянтинович
Соколовська-Сергієнко Оксана Григорівна
Троценко Віта Анатоліївна
2020-04-02
Updated: 2025-12-07
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