Wieslaw Oleszek

Wieslaw Oleszek
Institute of Soil Science and Plant Cultivation

Professor, PhD

About

306
Publications
139,889
Reads
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10,511
Citations
Additional affiliations
January 2011 - December 2012
Università di Pisa
January 2011 - present
Università degli Studi di Salerno
January 2010 - present
YKI Institute for Surface Chemistry
YKI Institute for Surface Chemistry

Publications

Publications (306)
Article
Different factors such as the genotype, environmental conditions, temperature stress, solar radiation and others can influence the phytochemical status of plants. The concentration of phenolic acids and alkylresorciols (ARs) as well as their chemical composition and biological activity have been determined in twelve winter wheat cultivars grown at...
Article
Full-text available
Y. schidigera contains a number of unusual polyphenols, derivatives of resveratrol and naringenin, called spiro-flavostilbenoids, which have potent in vitro anti-inflammatory, antioxidant, and moderate cholinesterase inhibitory activities. To date, these compounds have not been tested in vivo for the treatment of neurodegenerative diseases. The aim...
Article
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Ethnopharmacological relevance Caralluma quadrangula (Forssk.) N.E.Br. (Syns: = Stapelia quadrangula Forssk. = Monolluma quadrangula Forssk.) is an indigenous member of the genus Caralluma and it is a rather common species on rocky hillsides in the southwestern part of Saudi Arabia. Several members of this genus have found medicinal uses in the tre...
Article
Full-text available
The goal of this work is to evaluate the hop stems, a byproduct of hop cones production, as a potential source of cellulose. Hop stems contain up to 29% of cellulose. The cellulose isolation was conducted through the thermochemical treatment. After high-speed blending, the cellulose was characterized by 67% of crystallinity degree obtained from X-r...
Article
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The work is aimed at phytochemical characterization and In Vitro evaluation of antioxidant actions, anti-inflammatory effects, and cytotoxicity of purified extracts from three rupturewort (Herniaria L.) species, i.e., Herniaria glabra (HG), H. polygama (HP), and H. incana herb (HIh). The total phenolic content established in the purified extracts (...
Article
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Recently, Diaporthe has been considered the most frequently isolated genera of endophytic fungi, having a broad spectrum of host plants and a worldwide distribution. The endophytic Diaporthe strain used in the present work came from the Fungal Collection of Phytopathology and Mycology Subdepartment, University of Life Sciences in Lublin (Poland), a...
Article
The present study has tentatively elucidated the structure of two acylated polyoxypregnane glycosides from Caralluma quadrangula (Forssk.) N.E.Br. (CQ). The analyses were performed using an electrospray-ionization quadrupole time-of-flight (ESI-Q-TOF) mass spectrometer in positive ionization modes to explore fragmentation pathways. The used ionizat...
Article
Full-text available
Two triterpene saponins, including a novel serjanic acid derivative, were isolated from Chenopodium hybridum L. (Amaranthaceae) aerial parts. Their structures were elucidated by a combination of spectroscopic methods (MS, 1D and 2D NMR). Both compounds were evaluated for cytotoxicity and selectivity on skin, prostate, gastrointestinal, thyroid and...
Article
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The study is based on phytochemical profiling and in vitro evaluation of biological effects of phenolic acid derivatives-rich Herniaria fractions, isolated from two rupturewort (Herniaria L.) species, i.e. Herniaria incana Lam. (syn. H. besseri Fisch. ex Hornem) and H. polygama J. Gay (syn. H. odorata). For the first time, the composition of phenol...
Article
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A total of twenty-eight flavonol glycosides and one alkaloidal metabolite have been detected in 40% MeOH portion after eluting the crude extract from the aerial parts of Bassia eriophora on C-18 short column. These compounds were tentatively detected by using LC–ESI-MS/MS in negative ion mode [M–H]– and represented two major categories: acylated an...
Article
Humulus lupulus L. is known to have preservative, mild sedative, hypnotic, and estrogenic properties that are related to its chemical composition. Hops are widely used in brewing, also in pharmacy, and cosmetics. Moreover, the continuous development of biological research creates new application possibilities. The present paper was to measure the p...
Article
Full-text available
Tagetes erecta L. is a popular ornamental plant of the Asteraceae family, which is widely cultivated not only for its decorative use, but also for the extraction of lutein. Besides carotenoid representatives, which have been extensively studied, other important classes of secondary metabolites present in the plant, such as polyphenols, could exhibi...
Article
Ethnopharmacological relevance: The Cleomaceae family is known for its richness in secondary metabolites and different Cleome species are used in folk medicine. Cleome amblyocarpa and Cleome arabica are medicinal herbs used in Tunisia and other North Africa countries to treat various diseases such as diabetes, rheumatism, colic, pain and digestive...
Article
Full-text available
Inhibition of cholinesterases remains one of a few available treatment strategies for neurodegenerative dementias such as Alzheimer’s disease and related conditions. The current study was inspired by previous data on anticholinesterase properties of diterpenoids from Perovskia atriplicifolia and other Lamiaceae species. The acetylcholinesterase (AC...
Article
Full-text available
Cleome amblyocarpa Barr. and Murb is a medicinal plant widespread in North Africa and widely used in Tunisia to treat diabetes and colic. The non-volatile (polyphenols, flavonoids, tannins, and flavonols) and volatile compounds (GC-MS) of C. amblyocarpa leaves and stems have been studied. The antioxidant, antimicrobial, analgesic, and cytotoxic act...
Chapter
Long-term experiments located in Poland enable long-term observation of impacts of crop production systems, rotation, or EOM application on soil quality in the context of Polish soil and climatic conditions. The history of some experiments dates back to 60 years. They provide rich data on impact of rotation and tillage on soils and crop performance...
Article
Full-text available
Content of bioactive saponins of Medicago species suggests that they may also exert, as previously demonstrated on M. sativa, nematicidal properties exploitable for the formulation of new products for sustainable phytoparasitic nematode management. This study was addressed to highlight the bioactivity of saponins from five different Medicago specie...
Chapter
Saponins belong to the group of plant glycosides widely distributed in more than 100 families of both wild and cultivated plants and in some marine organisms. They consist of the steroidal or triterpene hydrophobic aglycone and one to three sugar chains (hydrophilic part) attached by ester or ether linkage. Based on number of chains attached to the...
Article
Background: Ten varieties of alfalfa (Medicago sativa L.) were evaluated for saponin content. Two of the most promising varieties were chosen to study their effect on rumen fermentation and methane production. Initially, four Hohenheim gas tests (HGT) were performed to test the effect of increased levels of total saponin extracted from the two alf...
Article
Full-text available
The ethyl acetate fraction of the methanolic extract of Yucca schidigera Roezl ex Ortgies bark exhibited moderate acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitory activity (IC50 47.44 and 47.40 µg mL −1 , respectively). Gel filtration on Sephadex LH-20 and further RP-C18 preparative HPLC of EtOAc fraction afforded 15 known an...
Article
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Zinnia elegans (syn. Zinnia violacea) is a common ornamental plant of the Asteraceae family, widely cultivated for the impressive range of flower colors and persistent bloom. Given its uncomplicated cultivation and high adaptability to harsh landscape conditions, we investigated the potential use of Z. elegans as a source of valuable secondary meta...
Article
Three previously undescribed cardenolides, acovenosigenin A 3-O-α-L-acofriopyranoside (1), 14-anhydroacovenosigenin A 3-O-[β-D-glucopyranosyl-(1″→4′)-O-α-L-acofriopyranoside] (2), and 14-anhydroacovenosigenin A 3-O-[β-D-glucopyranosyl-(1″→4′)-O-α-L-acovenopyranoside] (3), together with the two already known ones, 14-anhydrodigitoxigenin 3-O-β-D-glu...
Article
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The use of natural compounds derived from agricultural crops and other plants as health promoting chemicals gains tremendous growing interest in various industrial sectors as well as among people worldwide. These chemicals have been more and more employed by the food industry as food additives, functional food ingredients, nutraceuticals, by feedst...
Article
The aim of this study is to characterize minor lipids in methanol fraction extracted from raw camel milk. The C18 column showed high fractionation efficiency of minor lipids, such as glycosphingolipids, lipopolysaccharides or oligosaccharides when compared to other constituents, in particular polysaccharides, proteins and free fatty acids. LC-ESIMS...
Article
Saponins are naturally occurring metabolites found in many families of plants and also in some marine invertebrates. Their isolation and determination are frequently very challenging, mainly because of the complexity of a sample matrix, the vast diversity of possible structures, and similarity in chemical properties among the saponins. This article...
Article
Full-text available
Strawberry (SB), black currant (BC), and raspberry seed (RB) residues were used in 3 experiments to study their effects on ruminal fermentation, methane concentration, and fatty acid (FA) proportions in the ruminal fluid and milk of dairy cows. Initially, a batch fermentation in vitro study (experiment 1) was performed to investigate the effects of...
Article
Full-text available
The exponentially increasing scientific corpus on theeconomics of bioeconomy, as shown by Konstantinis etal., is systematically presented in several recent booksemphasizing sustainability (Viaggi, 2018), transition(Lewandowski, 2017), supply chain efficiency (Panout-sou, 2017), the role of bioenergy (Lago, Caldés, &Lechón, 2018), and technology tra...
Article
BACKGROUND Alfalfa (Medicago sativa) is an important legume used in animal feed. The primary objective in this study was to analyze and trace the individual saponins in fresh and ensiled alfalfa of ten varieties, with the aim of evaluating the structural changes undergone by saponins during ensiling. A secondary objective was to examine whether any...
Article
Full-text available
The purpose of this study was to establish the free amino acids profile of Viola tricolor collected from different habitats in Poland. Viola tricolor (heartsease) is a very popular plant found worldwide, classified both as weed and medicinal plant. Based on a validated method, the following nineteen free amino acids were analyzed using liquid chrom...
Article
The phytochemical investigation of the whole plant extracts of Herniaria glabra L. (Caryophyllaceae) led to the identification and isolation of four known flavonoids, one known and three undescribed maltol derivatives, and benzyl β-gentiobioside. The structures were established by extensive 1D and 2D NMR spectroscopic analyses, as well as HRESIMS d...
Article
Background: Many natural products, particularly phenolic compounds, have been reported to have a strong inhibition against acetylcholinesterase (AChE) and butyrylcholinesterase (BChE), the key enzymes in the pathology of Alzheimer’s disease (AD). Hypothesis: Therefore, we hypothesized that some xanthahumol, naringenin, and acyl phloroglucinol deriv...
Article
Objective: The study covers an evaluation of the influence of extracts (1-50 μg/ml), isolated from aerial parts of nine Trifolium L. species (i.e. T. alexandrinum, T. fragiferum, T. hybridum, T. incarnatum, T. pallidum, T. pratense, T. resupinatum var. majus, T. resupinatum var. resupinatum and T. scabrum) on haemostatic properties of blood plasma...
Article
For centuries oak wood (Quercus robur) have been used in aging of wines and spirits, which is based on pleasant flavors given to beverages by phenolics transferred to the liquid during the maturation process. Other metabolites like triterpenoids can also be released. Searching for extractable triterpenoids in oak heartwood, twelve new, 1–12, and fi...
Article
For centuries wood containers have been used in aging of wines and spirits, due to the pleasant flavors they give to the beverages. Together with oak, sweet chestnut wood (Castanea sativa) have been often used for such purpose. The maturation process involves the transfer of secondary metabolites, mainly phenolics, from the wood to the liquid. At t...
Article
Full-text available
Phoenix dacylifera is an ancient palm species rich in (poly)phenols. These phenolic compounds were tentatively identified by using liquid chromatography coupled with ion spray mass spectrometry in tandem mode (LC/MS/MS) with negative ion detection. Negative identification of the compounds was based on their retention times and mass spectra in full...
Article
Full-text available
Teas and tinctures prepared from five rose organs were analyzed for their antioxidant, anti-hyaluronidase and acetylcholinesterase inhibiting activity. Moreover, analysis of phenolic acids and flavonoids was carried out by the use of LC-ESI-MS/MS. As a result, the presence of ten phenolic acids and ten flavonoid glycosides was shown. Significant an...
Article
Full-text available
Abstract: Research has confirmed the positive effect of berries of Aronia melanocarpa on the cardiovascular system. The protective effects of polyphenol-rich extract from berries of A. melanocarpa against changes in biological properties of fibrinogen were studied. In in vitro model of hyperhomocysteinemia the capability of fibrinogen to interact w...
Article
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The study investigates the relationship between soils that vary for different basic physicochemical parameters (pH, phosphorus and potassium content, granulometric composition and soil organic matter content) and the free amino acids content of Stellaria media. According to some research, plant amino acid profile is a good indicator of the conditio...
Article
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Animal by-products (ABPs), such as processed animal proteins, animal fats, milk and egg products, and former food products represent a potentially valuable resource for feeding livestock. According to Europe s authorities, around 18 million t of animal fat and meat industry by-products arise annually in the European Union (EU) from slaughterhouses,...
Article
Rugosa rose provides one of the largest hips frequently used in the preparation of pharmaceutical and food products. The aim of work was to conduct multidirectional study of biological activity and chemical composition of Rosa rugosa hips. Antiradical, cytotoxic (against cervical and breast cancer cell lines), antibacterial (against eight bacterial...
Article
Full-text available
The present in vitro study includes a comparative evaluation of anti-platelet (anti-thrombotic) properties of plant phenolics, isolated from nine different clover (Trifolium) species. The analysis covered phenolic fractions isolated from T. alexandrinum L., T. fragiferum L., T. hybridum L., T. incarnatum L., T. pallidum Waldst et Kit., T. resupinat...
Technical Report
Full-text available
Executive Summary The main resources for global food production (land, soil, water, biodiversity, some nutrient elements) are finite and some even scarce. Moreover wasting resources is often harmful to society and the environment. The pressure on our natural resources is large, and at risk of increasing in the coming decades due to the projected in...
Article
Roots of rugosa rose are often treated as by-products obtained in industrial amounts during renovation of cultivations. In this work, we attempted to examine their chemical composition and biological activity, to evaluate whether they can provide an interesting material for further use. As a result, the first such a detailed report on Rosa rugosa r...
Article
Full-text available
A robust and sensitive method for identification (quantification and confirmation) of 19 free amino acids in plant matrice - Stellaria media, based on liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS), with a triple quadrupole analyser, has been developed. Regarding MS optimization, the flow injection analysis (F...
Article
Four triterpenoid saponins (1–4) were isolated from the aerial parts of Trifolium argutum Sol. (sharp-tooth clover) and their structures were elucidated by comprehensive spectroscopic analysis, including 1D and 2D NMR techniques, mass spectrometry and chemical methods. Two of them are new compounds, characterized as 3-O-[α-l-rhamnopyranosyl-(1→2)-β...
Article
Full-text available
Phenolic compounds have different biological properties, including antioxidative activities, but they may also be prooxidants. The effect of phenolic fraction from roots of Alhagi maurorum on oxidative protein/lipid damages (determined by such parameters as levels of protein thiol groups and the concentration of thiobarbituric acid reactive species...
Article
Full-text available
The influence of methyl jasmonate on anthocyanin accumulation in roots of Kalanchoe blossfediana plants was studied. Methyl jasmonate (JA-Me), at a concentration of 5.0 to 40.0 mg.l-1, substantially increased anthocyanin accumulation in roots of intact plants, when it was applied as a solution under natural light conditions. The production of antho...
Article
Fourteen phenolic compounds (flavonoids and phenolic acids) were isolated and nineteen were identified in the aerial parts of Triticum aestivum L. The structures of these compounds were established based on the data obtained by electrospray ionization-mass spectrometry (ESI-MS) and nuclear magnetic resonance (NMR) techniques. Triticum aestivum L. w...
Chapter
Saponins are naturally occurring secondary metabolites, which can be widely found in a number of plant families. They can be found in different parts of plants usually as multicomponent mixtures. They are composed of the triterpene or steroidal aglycone to which a number of sugars in the form of one, two, or three sugar chains are attached. Dependi...
Conference Paper
Full-text available
A reliable and fast analytical method for over 20 free amino acids quantification in weed matrices is reported. Amino acids are not only key precursors for the synthesis of macromolecules serving crucial functions in the organisms, like enzymes or hormones and other nitrogenous compounds, but they are also key regulators of the major metabolic path...
Conference Paper
The aim of the present research was to determine differences in free amino acids content in Viola tricolor fresh weight, depending on the extraction methods. Amino acids having both the amine and carboxylic acid groups attached to the first carbon atom have particular importance in biochemistry. Amino acids are important substrates for the synthesi...
Article
Full-text available
Eryngium maritimum L. is a valuable medicinal species, but since it is protected plant, collection from natural populations is forbidden. Therefore, establishing an efficient system for micropropagation of this species is desirable. To determine the optimal nutritional factors needed for shoot multiplication, root development and secondary metaboli...
Conference Paper
Full-text available
Common chickweed (Stellaria media) is an annual or overwintering native plant and one of the commonest weeds in Europe. It also occurs on roadsides, shingle riverbanks, coastal cliffs and in gardens. It is widely distributed over all soil types but is more abundant on lighter soils. Common chickweed is a frequent weed of cereals, sugar beet and oth...
Article
Leek (Allium ampeloprasum var. porrum) is consumed as a vegetable throughout the world. However, little is known about the metabolites of leek cultivars, especially those with potentially important beneficial properties for human health. We provide new information for the overall metabolite composition of several leek cultivars grown in Europe by u...
Article
Medemia argun is an ancient palm rich in proanthocyanidins (PACs). These polyphenolic compounds are widely distributed in plants and are an integral part of the human diet. A sensitive high-performance liquid chromatography and electrospray ionization mass spectrometry (HPLC-ESI-MS) method in the negative ion mode for sequencing these ubiquitous an...
Article
Saponin composition of the roots of Eryngium planum L. was investigated. Triterpene saponins found in E. planum and also present in Eryngium maritimum were different from those described previously in Eryngium campestre L. Three primary saponins were isolated and their tentative identifications, based on the electrospray MS/MS fragmentation pattern...
Article
Full-text available
Tomatine was identified as the sole glycoalkaloid of Solanum lycopersicoides leaves. Its quantity in field-grown plants was about 3.2 3.5", of leaf dry matter. This finding gives more evidence of the strong affinity of S. lycopersicoides to the genus Lyropersicon. Furthermore it sugests that this species can be a useful germplasm in tomato breeding
Article
Abstract The present work was designed to study the effects of crude extracts from Tribulus pterocarpus, T. pentandrus and T. parvispinus on selected biological functions of human blood platelets in vitro. Platelet suspensions were pre-incubated with extracts from aerial parts of T. pterocarpus, T. pentandrus and T. parvispinus, at the final concen...
Article
Full-text available
Rosa rugosa petals are used for production of teas, jams, wines and juices. Despite the wide availability of rose cultivars comprehensive information on petals chemical composition and healthful properties is still lacking. Therefore, the aim of this study was analysis of cytotoxic, antioxidant, antimicrobial activity and chemical composition of ru...
Article
Cyanogenic glucosides were analyzed by ultra-high performance liquid chromatography combined with mass spectrometric in 88 Trifolium species grown at the same site. Based on the occurrence of cyanogenic glucosides and the linamarin/lotaustralin ratio species could be grouped into five clusters. Cluster C1 included 37 species, which did not contain...