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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

2019

tom 18

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.

Surplus fertilization effect on photosynthetic response of pea to Cd stress at different growth stages

100%

Januskaitiene I., Diksaityte A.

Polish Journal of Environmental Studies

2014

tom 23

nr 5

Besides being involved in growth and development of plants, the essential macronutrients also affect stress tolerance. The aim of this study was to assess the surplus fertilization effect on photosynthetic parameters and the growth of Cd-treated pea (Pisum sativum L.) plants at different growth stages. Surplus fertilizer norm reduced the negative effect of cadmium on the photosynthetic system of pea at leaf development stage, while at lateral shoots stage their influence was rather different. Fertilization had the largest statistically significant effect on all the investigated parameters while the growth stage of plants was also a strong factor, changing cadmium and plant nutrient interactions.

Changes of physiological and genetic indices of Lycopersicon esculentum Mill. by cadmium under different acidicity and nutrition

41%

Duchovskis P., Brazaityte A., Juknys R., Januskaitiene I., Sliesaravicius A., Ramaskeviciene A., Burbulis N., Siksnianiene J. B., Baranauskis K., Duchovskiene L., Stanys V., Bobinas C.

Polish Journal of Environmental Studies

2006

tom 15

nr 2

Changes in physiological and genetic indices of Lycopersicon esculentum Mill. due to the impact of cadmium at different substrate acidity and nutrition were studied under controlled conditions in phytotron. The amount of photosynthetic pigments, stem diameter, sap flow rate, the mitotic index of cells and inhibition of cell mitosis were investigated. Cadmium in acidic environment produced a very toxic effect on growth, the synthesis of chlorophylls and carotenoids and stem diameter, sap flow rate of L. esculentum. Cadmium suppressed the mitotic index of cells and disorganized normal mitosis. The mitosis with anomalies (chromosome breaks, fragmentation, bridges, chromosome eliminations and abnormal nucleus divisions) was observed in meristem cells of roots of L. esculentum. It was concluded that nutrient deficiency led to evident plant growth retardation, and higher nutrient favoured plant growth under the effect of cadmium.

Ograniczanie wyników

2 Polish Journal of Environmental Studies

1 Acta Scientiarum Polonorum. Hortorum Cultus

3 Januskaitiene I.

1 Baranauskis K.

1 Bobinas C.

1 Brazaityte A.

1 Burbulis N.

1 Diksaityte A.

1 Duchovskiene L.

1 Duchovskis P.

1 Juknys R.

1 Ramaskeviciene A.

1 Sakalauskiene S.

1 Siksnianiene J. B.

1 Sliesaravicius A.

1 Stanys V.

1 2019

1 2014

1 2006

Wyniki wyszukiwania

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

Surplus fertilization effect on photosynthetic response of pea to Cd stress at different growth stages

Changes of physiological and genetic indices of Lycopersicon esculentum Mill. by cadmium under different acidicity and nutrition