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1

Wpływ zwiększonego promieniowania UV-B na poziom barwników chloroplastowych i intensywność fotosyntezy w siewkach ogórka

100%

Rybus-Zajac M.

Nauka Przyroda Technologie. Uniwersytet Przyrodniczy w Poznaniu

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2012

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tom 06

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nr 3

Badano wpływ zwiększonego promieniowania UV-B (16 kJ/m2 w ciągu doby) na poziom barwników chloroplastowych, intensywność fotosyntezy i wzrost siewek ogórka odmiany mieszańcowej ‘Polan’ F1 w dwu stadiach rozwojowych. W liścieniach pod wpływem zwiększonej radiacji poziom barwników chloroplastowych i intensywność fotosyntezy wzrastały w porównaniu z kontrolą. W liściach siewek 3-tygodniowych w warunkach stresowych stwierdzono sukcesywny spadek zawartości barwników, intensywności fotosyntezy oraz ograniczenie wzrostu.

2

Czy zwiekszone promieniowanie UV-B modyfikuje poziom barwnikow chloroplastowych oraz związkow fenolowych w siewkach ogorka

100%

Rybus-Zajac M.

Nauka Przyroda Technologie. Uniwersytet Przyrodniczy w Poznaniu

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2009

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tom 03

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nr 3

3

Wplyw zwiekszonego promieniowania UV-B na poziom barwnikow chloroplastowych w roslinach cisa pospolitego [Taxus baccata L.]

100%

Rybus-Zajac M.

Nauka Przyroda Technologie. Uniwersytet Przyrodniczy w Poznaniu

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2010

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tom 04

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nr 3

4

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Oxidative stress generation in Taxus baccata leaves affected by Pestalotiopsis funerea under sunny and shaded conditions

100%

Rybus-Zajac M.

Dendrobiology

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2005

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tom 54

51-56

In the last few years on old yew trees growing in the parks and gardens extensive disease symptoms were observed on leaves, indicating affection with pathogenic microorganisms. The causal factor was the presence of a fungal pathogen, Pestalotiopsis funerea. Physiological responses involving the oxidative stress, i. e. superoxide anion and hydrogen peroxide levels, and the superoxide dismutase were analyzed as an element of a plant defense mechanism. Diseased leaves from plants growing under sunny and shaded conditions, from May to July, were investigated. The increased generation of superoxide anion-radicals and hydrogen peroxide were observed in the leaves with disease symptoms simultaneously with the activation of superoxide dismutase, which may indicate the induction of host defense response to the P. funerea.

5

Drought and excess UV-B irradiation differentially alter the antioxidant system in cucumber leaves

63%

Kubis J., Rybus-Zajac M.

Acta Biologica Cracoviensia. Series Botanica

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2008

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tom 50

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nr 2

35-41

The combined effects of enhanced UV-B radiation and soil drought on antioxidant enzyme activity were investigated in cucumber leaves. One-month-old cucumber plants (Cucumis sativus cv. Dar) were exposed to UV-B irradiation and water deficit alone or combined. Physiological measurements were made in seedlings kept under stress conditions for nine days and then two more days with stresses withdrawn. Generally a decrease in relative water content and an increase in dry weight content were recorded. The more significant changes were observed under drought than under UV-B radiation and or combined UV-B and drought. Both stresses stimulated antioxidant enzyme activity. Superoxide dismutase activity increased earlier (day 2) than guaiacol peroxidase and glutathione reductase activity (days 5 and 7). Elevation of enzyme activities was higher under drought than under UV-B. Combined UV-B and drought functioned synergistically: one of the stresses reduced the effects caused by simultaneous application of the other.

6

Effect of UV-B radiation on antioxidative enzyme activity in cucumber cotyledons

63%

Rybus-Zajac M., Kubis J.

Acta Biologica Cracoviensia. Series Botanica

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2010

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tom 52

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nr 2

7

Aktywnosc beta-glikozydazy i peroksydazy w siewkach lubinu zoltego infekowanych Fusarium oxysporum f. sp. lupini

63%

Rybus-Zajac M., Morkunas I.

Acta Agrobotanica

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2005

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tom 58

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nr 2

103-110

Lupine diseases caused by pathogenic fungi constitute a serious problem in agriculture. They lead to partial yield loss and deterioration of crop quality through the changes in biochemical composition of seeds or their contamination with mycotoxins. Some of common lupine diseases are fusarioses caused by Fusarium oxyspomm f. sp. lupini. Morphometric and metabolic changes were investigated in yellow lupine seedlings infected with F. oxyspomm f. sp. lupini. It was found that infection caused temporary inhibition of seedling growth, overcome at later development, and activation of ß-glycosidase and peroxidases. The changes in enzymes activity indicate the induction of defense mechanism against F. oxyspomm f. sp. lupini and inhibition of pathogen spread.

8

Content of chloroplast pigments in the phase of maize ear blooming depending on nitrogen and magnesium fertilization

63%

Szulc P., Rybus-Zajac M.

Acta Scientiarum Polonorum. Agricultura

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2009

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tom 08

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nr 3

Field experiment was carried out on the Didactic and Experimental Farm in Swadzim (52°26’ N; 16°45’ E) near Poznań, in the years 2004-2007. The three-factorial experiment was established in “split-plot” design with 4 replications. The reaction of two maize hybrid types on the application of 6 nitrogen doses and magnesium fertilization was studied. The influence of the studied factors on the content of chloroplast pigments in maize leaf blades in the phase of ear blooming (BBCH 67) was estimated. A greater content of chlorophyll a and a + b expressed in SPAD units was found in maize leaf blades of the stay-green type, as compared with leaf blades of the conventional Anjou 258 hybrid. Concentration of chlorophyll a and a + b was increasing in a linear way in the nitrogen range from 0 to 120 kg N·ha⁻¹, while the amount of chlorophyll expressed in SPAD units ranged from 0 to 150 kg N·ha⁻¹. The stay-green type hybrid showed to be better nourished with nitrogen, on the basis of chlorophyll content in maize leaf blades, in the phase of ear blooming (BBCH 67), in comparison with the conventional hybrid and, at the same time, a lower nitrogen fertilization was needed. A simultaneous fertilization with magnesium increased the content of chloroplast pigments, in comparison with the application of nitrogen only. With the increase in the assimilation area of a single maize plant and of a maize stand (LAI indicator), the chlorophyll concentration in leaf blades was decreasing in a linear way.

9

Nitrogen metabolism in cucumber cotyledons and leaves exposed to the drought stress and excessive UV-B radiation

63%

Rybus-Zajac M., Kubis J.

Acta Scientiarum Polonorum. Hortorum Cultus

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2018

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tom 17

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nr 5

Plants absorb light energy for photosynthesis, and some amount of potentially damaging range of solar radiation, ultraviolet B. It accounts for less than 0.5% of the total solar radiation and the ambient current level of UV-B during the growth season provide 10 kJ·m–2 energy per day on the Earth’s surface. In the field conditions, increased UV-B radiation is often accompanied by drought, but negative effect of combined stresses is not so deleterious as the effect of one of them alone. We studied some changes in nitrogen me deficit and UV-B radiation. The stresses generally decreased the biomass and total dry matter production. Combination of water deficit and UV-B activated a stress tolerance mechanism in cucumber seedlings. The NR activity and synthesis of UV-B absorbing compounds were induced. Protection against UV-B radiation can partially involve increased production of UV-B protective pigments – slightly increased the SPAD value in cucumber cotyledons and leaves was observed. The deleterious effect of combined stresses was weaker than their additive or individual effects.

10

Podatnosc lubinu bialego na porazenie przez Pleiochaeta setosa [Kirchn.] Hughes

63%

Rybus-Zajac M., Korbas M.

Progress in Plant Protection

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1996

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tom 36

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nr 2

202-204

11

Effect of radiation stress on antioxidant enzyme activity in coniferous plants

63%

Rybus-Zajac M., Zielezinska M.

Biological Letters

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2005

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tom 42

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nr 2 Spec.Vol.

12

Generation of active oxygen species in yew shoot blight of Taxus baccata L. caused by Pestalotiopsis funerea desm

63%

Rybus-Zajac M., Mietkiewicz M.

Polish Journal of Natural Sciences. Supplement

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2003

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tom 01

13

Activity of beta-D-glucosidase of lupin leaves infected with Pleiochaeta setosa [Kirchn.] Hughes

63%

Rybus-Zajac M., Kozlowska M.

Acta Physiologiae Plantarum

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1996

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tom 18

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nr 3

51%

Janowska B., Czuchaj P., Rybus-Zajac M.

Acta Agrobotanica

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2016

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tom 69

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nr 1

Analyses were conducted on leaves of two ×Heucherella L. cultivars: ‘Solar Power’ and ‘Kimono’. Leaves were harvested at two dates: spring (2014-05-22) and summer (2014-07-26). Prior to each leaf harvest day, the maternal plants were sprayed with benzyladenine (BA) at a concentration of 100, 300 and 600 mg dm−3. After being cut, the leaves were placed in containers with distilled water. In the cultivar ‘Solar Power’, BA at a concentration of 100–600 mg dm−3 had an advantageous effect on post-harvest longevity of leaves harvested in summer, improving it by 31.7–98.3%, while in the cultivar ‘Kimono’ BA at the above-mentioned concentrations improved post-harvest longevity of leaves harvested both in spring and summer by almost 2 months. BA at a concentration of 100–600 mg dm−3 inhibited proteolysis in leaves of the tested ×Heucherella cultivars, except for leaves of the cultivars ‘Solar Power’ and ‘Kimono’ harvested in summer from plants sprayed with BA at a concentration of 100 mg dm−3. In these leaves, the protein level was comparable to that in the control leaves. In leaves treated with BA at a concentration of 100–600 mg dm−3, the content of saccharides was higher than in the control plants harvested in the spring and summer.

20

The effect of drought stress and excessive UV-B radiation on the membrane status in cucumber cotyledons and leaves

51%

Rybus-Zajac M., Korbas A., Kubis J.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

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2017

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tom 20

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nr 4

Ograniczanie wyników

Wpływ zwiększonego promieniowania UV-B na poziom barwników chloroplastowych i intensywność fotosyntezy w siewkach ogórka

Czy zwiekszone promieniowanie UV-B modyfikuje poziom barwnikow chloroplastowych oraz związkow fenolowych w siewkach ogorka

Wplyw zwiekszonego promieniowania UV-B na poziom barwnikow chloroplastowych w roslinach cisa pospolitego [Taxus baccata L.]

Oxidative stress generation in Taxus baccata leaves affected by Pestalotiopsis funerea under sunny and shaded conditions

Drought and excess UV-B irradiation differentially alter the antioxidant system in cucumber leaves

Effect of UV-B radiation on antioxidative enzyme activity in cucumber cotyledons

Aktywnosc beta-glikozydazy i peroksydazy w siewkach lubinu zoltego infekowanych Fusarium oxysporum f. sp. lupini

Content of chloroplast pigments in the phase of maize ear blooming depending on nitrogen and magnesium fertilization

Nitrogen metabolism in cucumber cotyledons and leaves exposed to the drought stress and excessive UV-B radiation

Podatnosc lubinu bialego na porazenie przez Pleiochaeta setosa [Kirchn.] Hughes

Effect of radiation stress on antioxidant enzyme activity in coniferous plants

Generation of active oxygen species in yew shoot blight of Taxus baccata L. caused by Pestalotiopsis funerea desm

Activity of beta-D-glucosidase of lupin leaves infected with Pleiochaeta setosa [Kirchn.] Hughes

Peroxidase involvement in response of lupin to Pleiochaeta setosa

Wpływ Fusarium culmorum na zawartość chlorofilu w zależności od dawki azotu i sposobu nawożenia

Effect of benzyladenine and gibberellic acid on the growth and flowering of Anemone coronaria L. 'Sylphide'

Wielocechowa analiza efektów różnych metod aplikacji magnezu u mieszańca kukurydzy LG 2244

Influence of nitrogen dose, type of nitrogen fertilizer and method of its application on plant health of maize hybrids (Zea mays L.)

Post-harvest longevity of xHeucherella L. leaves after the application of benzyladenine sprayed on maternal plants

The effect of drought stress and excessive UV-B radiation on the membrane status in cucumber cotyledons and leaves