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Dynamics of photosynthetic and oxidative stress parameters of two spinach species after short-term low UV-B radiation effect

100%

Januskaitiene I., Sakalauskiene S.

Acta Scientiarum Polonorum. Hortorum Cultus

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2019

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tom 18

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nr 1

This work aimed to underline the dynamics of photosynthetic and oxidative stress parameters of ‘Matador’ and ‘Andromeda’ spinach species after short-term 1 and 2 kJm–2 UV-B radiation effect. When plants reached 3–4 leaves growths stage, the exposure to 1 kJm–2 and 2 kJm–2 UV-B radiation was done once for 68 and 136 minutes, respectively. The photosynthetic and oxidative stress parameters were determined 2, 24, 48 and 72 hours after exposure. The stimulating effect of UV-B emerged on the 3rd day after exposure. The positive effect of UV-B was more pronounced for ‘Matador’. The highest DPPH radical-scavenging capacity and the highest concentration of α-tocopherols were detected 24 hours after 2 kJ UV-B exposure, but the decrease in photosynthetic rate was the highest as well. Meanwhile, on the 3rd day after 1 kJ UV-B exposure, the indicators of oxidative stress of ‘Matador’ decreased, and the photosynthetic rate increased. This study highlights that low UV-B radiation acts as an eustress, by awaking positive changes in photosynthetic and oxidative stress parameters of spinach.

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Assessment of the impact of UV radiation on selected properties of the transparent coating for wood finishing

72%

Boruszewski P., Swiatek P., Zbiec M., Borysiuk P.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2015

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tom 92

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In search of ionizing radiation effect on nucleosides: radiolysis of cytidine

72%

Zavyalova O., Janiak A., Misiura K., Truszkowski S., Chostenko A.

Current Topics in Biophysics. Supplement

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2011

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tom 34

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nr A: Posters

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Degradation of paper products from waste pulp type C with the addition of different colour pigments under the influence of UV radiation

72%

Modzelewska I., Patelski E., Jaszczur A.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2012

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tom 79

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The effect of ionizing radiation on vernalization, growth and development of winter wheat

72%

Czyczylo-Mysza I. M., Marcinska I., Jankowicz-Cieslak J., Dubert F.

Acta Biologica Cracoviensia. Series Botanica

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2013

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tom 55

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nr 1

The effects of gamma irradiation on the vernalization requirements, growth and development of winter wheat grown in a rainout shelter were studied during two successive growing seasons. Dry grains of winter wheat cv. Kobra were irradiated with 300 Gy radiation from a cobalt 60 gamma irradiator. Treated and control grains were pregerminated and subjected to vernalization for 0, 42 or 54 days. Morphological parameters of the plants developing from irradiated seeds (M1 generation) and the plants grown from the seeds produced by the irradiated plants (M2 generation) were measured in order to track the studied effects over two generations. Irradiation of dry grains slowed the growth and development of the plants regardless of the temperature treatment. The measured yield structure elements appeared to be lower for irradiated plants, but no clear effect of radiation on vernalization requirements was noted.

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Health of agricultural workers of Ukraine after Chernobyl accident

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Kundiev Y. I., Vitte P. N., Karakashyan A. N., Chernyuk V. I., Faktorov I. E.

Annals of Agricultural and Environmental Medicine

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1994

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tom 01

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nr 2

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Wpływ promieniowania jonizującego na szkodniki zbóż. II. Wpływ promieniowania gamma radiokobaltu na rozkruszka mącznego (Tyroglyphus farinae L.)

58%

Szyszko E., Wozniak J., Malesa J.

Roczniki Państwowego Zakładu Higieny

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1962

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tom 13

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nr 5

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Comparison of water stress and UV radiation effects on induction of CAM and antioxidative defense in the succulent Rosularia elymaitica (Crassulaceae)

58%

Habibi G., Hajiboland R.

Acta Biologica Cracoviensia. Series Botanica

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2011

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tom 53

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nr 2

Growth and photosynthetic characteristics, inducibility of the CAM pathway and the functioning of the antioxidant defense system were investigated in Rosularia elymaitica (Crassulaceae) under drought and UV stresses. Drought did not substantially affect the growth of the plants, but it significantly reduced leaf thickness as well as osmotic potential, water potential and relative water content. In contrast, UV radiation treatment affected neither growth nor the water relations of leaves. Water limitation for 12 days caused a significant increase in nighttime PEPC and NAD-MDH activity and an increase in Δtitratable acidity relative to well-watered plants. The nighttime CO2 net assimilation rate increased significantly in drought-stressed plants but was still negative, resembling a C3-like pattern of gas exchange. Twenty days of UV treatment, increased Δtitratable acidity slightly and increased only daytime PEPC activity, and did not affect other parameters of carbon metabolism. As judged by maintenance of membrane integrity and stable amounts of H2O2 under UV stress, the antioxidant defense system effectively protected the plants against UV radiation. In contrast, oxidative stress occurred under severe drought stress (20 days of withholding water). Except for higher daytime APX activity in the UV-treated plants, enzyme activity in the control and in the drought- and UV-stressed plants did not show any diurnal fluctuation during 24 h. Temporal changes in Δtitratable acidity and ΔPEPC activity coincided closely with those of antioxidant enzymes; both started to increase after 12 days of drought stress. These results indicate that drought stress but not UV radiation induced the CAM-cycling pathway in R. elymaitica.

Ograniczanie wyników

Dynamics of photosynthetic and oxidative stress parameters of two spinach species after short-term low UV-B radiation effect

Assessment of the impact of UV radiation on selected properties of the transparent coating for wood finishing

In search of ionizing radiation effect on nucleosides: radiolysis of cytidine

Degradation of paper products from waste pulp type C with the addition of different colour pigments under the influence of UV radiation

The effect of ionizing radiation on vernalization, growth and development of winter wheat

Health of agricultural workers of Ukraine after Chernobyl accident

Wpływ promieniowania jonizującego na szkodniki zbóż. II. Wpływ promieniowania gamma radiokobaltu na rozkruszka mącznego (Tyroglyphus farinae L.)

Comparison of water stress and UV radiation effects on induction of CAM and antioxidative defense in the succulent Rosularia elymaitica (Crassulaceae)