Nadezhda I. Shabnova

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The extent of damage caused to the photosynthetic machinery of 10-d-old wheat seedlings by short-term exposure to mild heat, their capacity to recover from it and the possible roles of H2O2, SOD, catalase and ascorbate peroxidase on the recovery process were investigated. Seedlings were subjected to heat treatments at 40/42/44 °C for 20 min in the dark and(More)
Leaves of spinach (Spinacia oleracea, cv. Ispolinskii) were preilluminated by low-intensity light (1.0 and 1.5 W/m2, 0.5–3.0 h) with wavelengths ranging from 530 to 730 nm to study the effect of this pretreatment on the activity of photosystem II (PS II), content of photosynthetic pigments, and peroxidase activity in excised leaves exposed to UV-A(More)
The nature of photosynthetic recovery was investigated in 10-d-old wheat (Triticum aestivum L., cv. Moskovskaya-35) seedlings exposed to temperatures of 40 and 42 degrees C for 20 min and to temperature 42 degrees C for 40 min in the dark. The aftereffect of heat treatment was monitored by growing the heat-treated plants in low/moderate/high light at 20(More)
The dynamics of development of oxidative stress and poststress recovery of the photosynthetic apparatus in leaves of 10-day-old wheat seedlings subjected to heat shock (40, 42, and 44°C) for 20 min and exposed to light for 72 h are studied. The effect of pretreatment temperature and light intensity on recovery of the photosynthetic apparatus and its(More)
This paper studies how UV-A irradiation and preirradiation of 10-day lettuce seedlings (Lactuca sativa L.) with red light (λmax = 664 nm, 10 min, 1 W m−2) affect the activity of the photosynthetic apparatus, content of chlorophylls a and b, and H2O2 in leaves, as well as peroxidase activity. Growth in the UV-A resistance of the photosynthetic apparatus was(More)
It is shown that pretreatment of wheat seeds with chlorocholine chloride reduces inhibition of photosystem 2 activity in the first leaves of 10-day-old wheat variety Moskovskaya 35 seedlings caused by heating at 39–41°C for 5–20 min and improves its poststress recovery, probably due to activation of antioxidant enzymes and increase in the level of low(More)
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