A5004575440- Plant Stress Responses and Tolerance
- Allelopathy and phytotoxic interactions
- Plant Physiology and Cultivation Studies
- Plant tissue culture and regeneration
- Aluminum toxicity and tolerance in plants and animals
- Plant Micronutrient Interactions and Effects
- Phytochemicals and Antioxidant Activities
- Bioactive Compounds and Antitumor Agents
- Plant responses to water stress
- Silicon Effects in Agriculture
- Postharvest Quality and Shelf Life Management
- Plant biochemistry and biosynthesis
- Chemical synthesis and alkaloids
- Irrigation Practices and Water Management
- Phytochemistry and Biological Activities
- Insect-Plant Interactions and Control
- Photosynthetic Processes and Mechanisms
- Plant nutrient uptake and metabolism
- Plant Water Relations and Carbon Dynamics
- Geochemistry and Elemental Analysis
- Plant Reproductive Biology
- Essential Oils and Antimicrobial Activity
- Magnetic and Electromagnetic Effects
- Weed Control and Herbicide Applications
- Horticultural and Viticultural Research
University of Hradec Králové
2016-2023
Charles University
2016-2017
University of Pavol Jozef Šafárik
2013-2015
Crops, such as white cabbage (Brassica oleracea L. var. capitata (L.) f. alba), are often infested by herbivorous insects that consume the leaves directly or lay eggs with subsequent injury caterpillars. The plants can produce various defensive metabolites free radicals repel to avert further damage. To study production and effects of these compounds, large butterflies, Pieris brassicae flea beetles, Phyllotreta nemorum, were captured in a field applied cultivated lab. After insect...
The influence of increasing doses salicylic acid (SA) on selected physiological parameters and the content coumarin-related compounds diploid tetraploid cultivars Matricaria chamomilla plants were studied. Forty-eight hours after treatment SA showed growth-promoting effect with decrease in tissue water content, chlorophylls soluble proteins. High led to an increase reactive oxygen species (hydrogen peroxide superoxide radical) resulted membrane damage (measured by accumulation...
Enhanced UV-B irradiation is one of the most important abiotic stresses that can influence various aspects plant morphology, biochemistry and physiology. Silicon as a beneficial element increase plant's tolerance against different stresses, including stress. In this work, effect silicon supplementation on sensitivity young maize (Zea mays L.) seedlings exposed to short-term radiation was studied. The were grown with 0 or 5 mM in cultivation medium fifth day cultivation, they for 15 30 min...
Drought stress is a serious threat. Therefore, improvements in crop productivity under conditions of limited water availability are vital to keep global food security. Apples and cherries belong the most produced fruit worldwide. Thus, searching for their tolerant or resistant cultivars beneficial breeders produce more plants. We studied five apple (“Malinové holovouské”, “Fragrance”, “Rubinstep”, “Idared”, “Car Alexander”) cherry (“Regina”, “Napoleonova”, “Kaštánka”, “Sunburst”, “P-HL-C”)...
Plant response to osmotic stress is a complex issue and includes wide range of physiological biochemical processes. Extensive studies known cultivars their reaction drought or salinity are very important for future breeding new tolerant cultivars. Our study focused on the antioxidant activity, accumulations osmotica, content abscisic acid in apple (cv. “Malinové holovouské”, “Fragrance”, “Rubinstep”, “Idared”, “Car Alexander”) cherry “Regina”, “Napoleonova”, “Kaštánka”, “Sunburst”, “P-HL-C”)...
Physiological response of two cultivars Matricaria chamomilla plants on UV irradiation was studied. The impact used short-time dose evaluated in three time points; 2, 24 and 48 h after irradiation. Used immediately resulted changes plant oxidative status monitored as increased concentration H2 O2 . Decrease chlorophyll a b indicated the photosynthetic apparatus. For phenolic secondary metabolites, an increase total soluble phenols AlCl3 -reactive flavonols observed. activity main enzyme,...
Azorella compacta is traditionally used in the form of tea (infusion), Andean region South America, to treat various chronic diseases. However, health-promoting properties this herbal have not yet been extensively explored.The free radical scavenging activity A. infusion (ACI) was evaluated by 1,1-diphenyl-2-picrylhydrazyl (DPPH) and superoxide anion assays. The activation immune cells ACI, as determined cell surface cluster differentiation 69 expression, measured flow cytometry. qualitative...
Gemmotherapy represents the most recent therapeutic technique that uses properties of extracts from fresh meristematic plant tissues, mainly buds and sprouts, by macerating them in ethanol glycerol. The harvesting time location can significantly affect chemical composition buds. Therefore, this work aimed to point out possible variability phenolic content antioxidant potential prepared commonly grown trees Czech Republic. Extracts collected during autumn spring three different localities...
Phytochemical investigations of Matricaria chamomilla L. (Asteraceae) stated the presence several compounds with an established therapeutic and antioxidant potential. The chamomile non-enzymatic system includes low molecular mass compounds, mainly polyphenols such as cinnamic, hydroxybenzoic chlorogenic acids, flavonoids coumarins. objective this work was to evaluate role after stimulation by ethylene in tetraploid plants. Seven days treatment significantly increased activity phenylalanine...
Tuberculosis (TB) caused by Mycobacterium tuberculosis (Mtb) has become a frequently deadly infection due to increasing antimicrobial resistance. This serious issue driven efforts worldwide discover new drugs effective against Mtb. One research area is the synthesis and evaluation of pyrazinamide derivatives as potential anti-TB drugs. In this paper we report biological evaluations series ureidopyrazines. Compounds were synthesized reacting alkyl/aryl isocyanates with aminopyrazine or propyl...
Four different rapeseed (Brassica napus L.) cultivars CZL, Benefit, Iwas and ZhongZhuang9, were used to analyse physiological responses higher doses of cadmium (Cd) their ability Cd accumulation. Plants exposed for 30 days dosages (0, 50, 100, 150 mg Cd/kg) in soil under greenhouse conditions. Cadmium was accumulated more roots than shoots all tested cultivars, with the highest ZhongZhuang9. After lowest dose, translocation factor CZL (0.8) Benefit (0.6). The content both K Ca varied between...
<br>Plant-based indicators of water status, such as midday stem potential (Ψ<sub>stem</sub>) and leaf stomatal conductance (g<sub>s</sub>), are used to optimise irrigation scheduling in horticultural crops because they integrate the effect soil climatic conditions internal physiological constraints. The use these relies on experimentally acquired thresholds that relate value indicator negative effects yield. In five treatments, we monitored yield, fruit size courses Ψ<sub>stem</sub>...
Background: Silymarin, an active polyphenolic fraction of Silybum marianum, and high flavonoid content Fagopyrum possess various interesting biological activities.The substituted pyrazine-2-carboxamides were previously used as effective elicitors studied secondary metabolites.Objective: To study the effect new synthetic pyrazine carboxamide derivatives, N-(4-chlorobenzyl)-5-tert-butylpyrazine-2-carboxamide (1) 3-(3-((trifluoromethyl) benzyl) amino) pyrazine-2-carboxamide (2), on...
Abstract The objective of the present study was to evaluate effect methyl jasmonate (MeJA) in plant resistance polyphagous thrips. Eight-weeks old diploid and tetraploid chamomile plants ( Matricaria chamomilla ) stage leaf-rosettes were pre-treated with 0.22 mM MeJA for 72 h then co-cultivated thrips next 96 h. In both cultivars, there an increase content hydrogen peroxide superoxide radical, a maximum after infestation. pre-treatment MJ led reduction, but measured values still higher than...