Search results for: Hubert Sytykiewicz

Items from 1 to 18 out of 18 results

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Transcriptional Profiling of Catalase Genes in Juglone-Treated Seeds of Maize (Zea Mays L.) and Wheat (Triticum Aestivum L.)

Hubert Sytykiewicz, Agnieszka Kozak, Bogumił Leszczyński, Cezary Sempruch, more

Acta Biologica Hungarica > 2018 > 69 > 4 > 449-463

The major aim of the present study was to investigate the influence of juglone (JU; 5-hydroxy-l,4-naph-thoquinone) treatments on the expression level of Catl, Cat2 and Cat3 genes, encoding the respective catalase isozymes in maize (Zeamays L.) and wheat (Triticum aestivum L.) seeds. In parallel, germination efficiency, catalase (CAT) activity and hydrogen peroxide (H₂O₂) content in juglone-exposed...

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Role of phenolic compounds during antioxidative responses of winter triticale to aphid and beetle attack

Paweł Czerniewicz, Hubert Sytykiewicz, Roma Durak, Beata Borowiak-Sobkowiak, more

Plant Physiology and Biochemistry > 2017 > 118 > C > 529-540

One of the earliest responses of plants to insects’ attack is generation of reactive oxygen species. However, the elevated level of ROS can elicit oxidative burst within plant tissues, and plants employ antioxidant systems against these radicals. Due to their chemical structures, polyphenols are able to diminish the level of ROS. Thus, we investigated the role of phenolic compounds in oxidative stress...

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Transcriptional reprogramming of genes related to ascorbate and glutathione biosynthesis, turnover and translocation in aphid-challenged maize seedlings

Hubert Sytykiewicz

Biochemical Systematics and Ecology > 2016 > 69 > C > 236-251

Aphids are pierce-sucking insects that severely affect redox homeostasis in the host tissues. Reduced ascorbate (AsA) and glutathione (GSH) serve as multifunctional molecules involved in constituting sophisticated plant defense responses to aphids' herbivory. This survey aimed to decipher transcriptional responses of forty-one genes associated with AsA and GSH biosynthesis, turnover and translocation...

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Aphid-stimulated transcriptional reconfigurations of chlorophyllase-2 gene in maize (Zea mays L.) seedlings

Hubert Sytykiewicz, Beata Gabryś, Katarzyna Dancewicz, Beata Borowiak-Sobkowiak, more

Biochemical Systematics and Ecology > 2016 > 68 > C > 178-185

The purpose of the survey was to evaluate impact of bird cherry-oat aphid (Rhopalosiphum padi L.) herbivory on transcriptional responses of chlorophyllase-2 (CLH2) gene, total activity of chlorophyllase (CLH) enzyme and content of chlorophyll a in maize (Zea mays L.) leaves. Insect infestation assays were performed on 14-day-old seedlings of six maize varieties (i.e., Ambrozja and Waza – highly resistant;...

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Deciphering the role of NADPH oxidase in complex interactions between maize (Zea mays L.) genotypes and cereal aphids

Hubert Sytykiewicz

Biochemical and Biophysical Research Communications > 2016 > 476 > 2 > 90-95

Plant NADPH oxidases (NOXs) encompass a group of membrane-bound enzymes participating in formation of reactive oxygen species (ROS) under physiological conditions as well as in response to environmental stressors. The purpose of the survey was to unveil the role of NADPH oxidase in pro-oxidative responses of maize (Zea mays L.) seedling leaves exposed to cereal aphids’ infestation. The impact of apteral...

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Participation of the enzymes involved in the biosynthesis of biogenic amines in biochemical interactions between wheat (Triticum aestivum; Poaceae) and bird cherry-oat aphid (Rhopalosiphum padi; Aphididae)

Cezary Sempruch, Bogumił Leszczyński, Martyna Wilczewska, Hubert Sytykiewicz, more

Biochemical Systematics and Ecology > 2016 > 65 > C > 33-39

The studies concerned changes in the activities of ornithine decarboxylase (ODC), lysine decarboxylase (LDC) and tyrosine decarboxylase (TyDC) in tissues of wheat (Triticum aestivum L.) infested with bird cherry-oat aphid (Rhopalosiphum padi L.).Obtained results showed that the activities of the enzymes were stimulated in the less susceptible wheat Kontesa cv. infested by the aphids. In the case of...

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The level of flavonoids and amines in de-etiolated and methyl jasmonate treated seedling of common buckwheat

Marcin Horbowicz, Wiesław Wiczkowski, Dorota Szawara-Nowak, Tomasz Sawicki, more

Phytochemistry Letters > 2015 > 13 > Complete > 15-19

The effects of atmospheric methyl jasmonate on the level of flavonoids and biogenic amines in de-etiolated seedlings of common buckwheat (Fagopyrum esculentum Moench) were investigated. In cotyledons and hypocotyls of etiolated seedlings, some traces of anthocyanins were found, with no flavones and flavonols identified. A measurable content of flavones and flavonols was, however, determined in roots...

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Transcriptional responses of catalase genes in maize seedlings exposed to cereal aphids' herbivory

Hubert Sytykiewicz

Biochemical Systematics and Ecology > 2015 > 60 > Complete > 131-142

The performed study was aimed at assessing the influence of two species of cereal aphids (bird cherry-oat aphid, Rhopalosiphum padi L. and grain aphid, Sitobion avenae F.) on the transcriptional responses of all three catalase (cat1, cat2, cat3) genes in seedling leaves of maize (Zea mays L.) genotypes varying in resistance levels to the insects' infestation. Furthermore, time-course generation of...

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Changes in amino acid decarboxylation in maize (Zea mays; Poaceae) tissues in response to bird cherry-oat aphid (Rhopalosiphum padi; Aphididae) infestation

Cezary Sempruch, Bogumił Leszczyński, Martyna Wilczewska, Grzegorz Chrzanowski, more

Biochemical Systematics and Ecology > 2015 > 60 > Complete > 158-164

The study was focused on changes in the activities of ornithine decarboxylase (ODC), lysine decarboxylase (LDC) and tyrosine decarboxylase (TyDC) in maize seedlings infested by bird cherry-oat aphid (Rhopalosiphum padi L.).Obtained results showed that the aphid infestation induced LDC activity strongly within tissues of less aphid-settled maize (Waza cv.) during the first week of the infestation in...

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Apoptosis induction by concanavalin A in gut cells of grain aphid

Iwona Sprawka, Sylwia Goławska, Tina Parzych, Hubert Sytykiewicz, more

Arthropod-Plant Interactions > 2015 > 9 > 2 > 133-140

In this study, the toxicity and mechanism of action of concanavalin A (ConA) in the grain aphid ( Sitobion avenae ) were studied. Feeding assays with S. avenae on an artificial diet containing different concentrations of ConA demonstrated an inhibitory effect on fecundity as well as high mortality caused by this lectin. ConA also increased the pre-reproductive period...

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Methyl jasmonate stimulates biosynthesis of 2-phenylethylamine, phenylacetic acid and 2-phenylethanol in seedlings of common buckwheat

Marcin Horbowicz, Wiesław Wiczkowski, Tomasz Sawicki, Dorota Szawara-Nowak, more

Acta Biochimica Polonica > 2015 > 62 > 2 > 235-240

Methyl jasmonate has a strong effect on secondary metabolizm in plants, by stimulating the biosynthesis a number of phenolic compounds and alkaloids. Common buckwheat (Fagopyrum esculentum Moench) is an important source of biologically active compounds. This research focuses on the detection and quantification of 2-phenylethylamine and its possible metabolites in the cotyledons, hypocotyl and roots...

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Coexistence of Borrelia burgdorferi s.l. genospecies within Ixodes ricinus ticks from central and eastern Poland

Hubert Sytykiewicz, Grzegorz Karbowiak, Joanna Chorostowska-Wynimko, Adam Szpechciński, more

Acta Parasitologica > 2015 > 60 > 4 > 654-661

The purpose of the study was to assess the prevalence and coinfection rates of Borrelia burgdorferi sensu lato genotypes in Ixodes ricinus (L.) ticks sampled from diverse localities in central and eastern regions of Poland. In years 2009–2011, questing nymphs and adults of I. ricinus were collected using a flagging method at 18 localities representing distinct ecosystem types: urban green areas, suburban...

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The infection of reintroduced ruminants - Bison bonasus and Alces alces - with Anaplasma phagocytophilum in northern Poland

Grzegorz Karbowiak, Bronislava Víchová, Joanna Werszko, Aleksander W. Demiaszkiewicz, more

Acta Parasitologica > 2015 > 60 > 4 > 645-648

The north-eastern part of Poland is considered an area of high risk for infection with tick-borne diseases, including with human granulocytic ehrlichiosis (HGE) agents. The etiological agent of HGE is Anaplasma phagocytophilum. As the animal reservoir for A. phagocytophilum in the environment serve the species from Cervidae and Bovidae families. European bison (Bison bonasus) and elk (Alces alces)...

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Allelopatyczne oddziaływanie juglonu.

Agnieszka Kozak, Bogumił Leszczyński, Cezary Sempruch, Hubert Sytykiewicz

Kosmos > 2014 > 63 > 4 > 611-622

Allelopatia jest powszechnie występującym zjawiskiem w świecie roślin, które rosnąc w sąsiedztwie oddziaływają na siebie hamująco bądź stymulująco, wpływając na bioróżnorodność w lokalnym środowisku. Allelopatyczne oddziaływania roślin z rodziny orzechowatych (Juglandaceace) są doskonale widoczne w przyrodzie. Drzewa te syntetyzują wiele allelozwiązków, jednak najważniejszym z nich jest juglon należący...

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Induction of apoptosis in the grain aphid Sitobion avenae (Hemiptera: Aphididae) under the influence of phytohaemagglutinin PHA

Iwona Sprawka, Sylwia Goławska, Tina Parzych, Artur Goławski, more

Applied Entomology and Zoology > 2013 > 48 > 4 > 525-532

In the current work, the toxicity and mechanism of phytohaemagglutinin (PHA), lectin isolated from the kidney bean (Phaseolus vulgaris) to the grain aphid (Sitobion avenae F.) were studied. When S. avenae was fed an artificial diet containing the lectin PHA, toxicity assays indicated that fecundity decreased, the pre-reproductive period and generation time were prolonged, and mortality increased....

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Biochemical characterisation of chlorophyllase from leaves of selected Prunus species - A comparative study

Hubert Sytykiewicz, Iwona Sprawka, Paweł Czerniewicz, Cezary Sempruch, more

Acta Biochimica Polonica > 2013 > 60 > 3 > 457-465

Despite senescence-induced chlorophyll depletion in plants has been widely studied, the enzymatic background of this physiologically regulated process still remains highly unclear. The purpose of this study was to determine selected biochemical properties of partially purified fractions of chlorophyllase (Chlase, chlorophyll chlorophyllido-hydrolase, EC 3.1.1.14) from leaves of three Prunus species:...

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Effect of phenolic acids from black currant, sour cherry and walnut on grain aphid (Sitobion avenae F.) development

Grzegorz Chrzanowski, Bogumił Leszczyński, Paweł Czerniewicz, Hubert Sytykiewicz, more

Crop Protection > 2012 > 35 > Complete > 71-77

The influence of naturally-occurring phenolic acid mixtures from selected plants was tested against the grain aphid (Sitobion avenae F.). Phenolic acids were extracted from the leaves of black currant (Ribes nigrum L.), sour cherry (Prunus cerasus L.) and walnut (Juglans regia L.), as well as from the green husks of walnut. The highest content of total phenolic acids and individual compounds such...

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Insecticidal action of phytohemagglutinin (PHA) against the grain aphid, Sitobion avenae

Iwona Sprawka, Sylwia Goławska, Paweł Czerniewicz, Hubert Sytykiewicz

Pesticide Biochemistry and Physiology > 2011 > 100 > 1 > 64-69

The effects of phytohemagglutinin (PHA) on development, fecundity, and mortality of the grain aphid, Sitobion avenae (Fabricius), were determined. Also determined were the effects of PHA on the activity of gut enzymes involved in sugar and phosphorus metabolism (α- and β-glucosidase and alkaline and acid phosphatase) and on the feeding behavior of adult apterae.When added to a liquid diet, PHA increased...

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