Artykuły (WBiNoŻ)
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Pozycja The role of phenolic compounds in plant resistance(Lodz University of Technology Press, 2016) Kubalt, KamilaPhenolic compounds are plant secondary metabolites playing important roles in plant resistance. Their chemical structure is based on at least one aromatic ring bonded to one or more hydroxyl groups. They are mainly synthetized from amino acid phenylalanine which is converted to cinnamic acid. Phenolics are one of the largest and most diverse groups of plant active substances. These compounds take part in the regulation of seed germination and cooperate in regulating the growth of plants, also taking part in defence responses during infection, excessive sun exposure, injuries and heavy metal stress. One of the most important features of phenolic compounds is antioxidant activity which is closely related to their chemical structure. The aim of this review is to discuss the role of phenolic compounds in the interactions of plants with various stress factors, both biotic and abiotic with special attention to their antioxidant properties.Pozycja Antioxidants as a defensive shield in thyme (Thymus vulgaris L.) grown on the soil contaminated with heavy metals(Lodz University of Technology Press, 2016) Kubalt, Kamila; Leszczyńska, JoannaThe objective of this study was to investigate the effect of excessive concentration of selected heavy metals - nickel, copper and zinc on aromatic plants Thymus vulgaris. The present work examines the concentration of phenolic compounds, total antioxidant capacity and flavonoids content in leaves obtained from plants Thymus vulgaris grown on the soil contaminated with different concentration of these heavy metals. It was assumed, that selected metals, playing the role of micronutrients, cause toxic effect in their excessive concentrations, inhibit the growth and development of plants. Adverse impact on the plant is most likely due to the oxidative stress at a cellular level. It was demonstrated, that the lowest applied concentrations of heavy metals lead to the increased antioxidant content, which then decreases with increasing metal concentrations.Pozycja Accumulation of metal ions in selected plants from Brassicaceae and Lamiaceae families(Lodz University of Technology Press, 2016) Szczodrowska, Agnieszka; Kubalt, Kamila; Smolińska, Beata; Leszczyńska, JoannaThis paper examines the accumulation of metal ions from soil in selected edible plants belonging to the Brassicaceae and Lamiaceae families. The effect of metal ions on factors, such as growth and morphology are also investigated. The results indicate that the addition of selected metal ions to the soil significantly increases the concentration of metal ions in the plants. The application of zinc ions significantly enhances Zn uptake in Ocimum basilicum and Mentha piperita (Lamiaceae family). Nickel ions significantly increase Ni accumulation in Lepidium sativum (Brassiaceae family). The research shows that nickel, zinc and copper accumulate in leaves at different concentrations depending on the plant species.Pozycja Spices from Lamiaceae as a source of biologically active compounds(Lodz University of Technology Press, 2015) Kubalt, Kamila; Mańkowska, Dorota; Leszczyńska, JoannaHerbs and spices are often added to food not only to improve the taste and smell, but also facilitate digestion and improve human health. Many spices contain high levels of polyphenolic compounds and demonstrate high antioxidant capacity. According to a literature review polyphenolic compounds possess antimicrobial, antiparasitic, antiprotozoal, and antifungal properties]. Many spices contain high levels of polyphenolic compounds and demonstrate high antioxidant capacity. Phenolic compounds in herbs and spice plants are closely associated with their antioxidant activity ]. Many of the spice-derived compounds which are potent antioxidants may help protect the human body against oxidative stress and inflammatory diseases. Particularly noteworthy is the Lamiaceae family (Lamiaceae Lindl., Labiatae Juss.). Among that species most commonly used as a food additives are basil (Ocimum basilicum), peppermint (Mentha piperita), thyme (Thymus vulgaris), marjoram (Origanum majorana), oregano (Origanum vulgare), rosemary (Rosmarinus officinalis) and sage (Salvia officinalis).Pozycja The contamination of soil with metal ions and a content of biologically active compounds in the selected consumer plants(Lodz University of Technology Press, 2015) Szczodrowska, Agnieszka; Kubalt, Kamila; Smolińska, Beata; Leszczyńska, JoannaSoil has been habitually the most common sink for wastes containing heavy metals [1]. Higher metal ions concentration in plants caused several physiological and biochemical disorders including reduced growth and yield, nutrient uptake, changes in chloroplast ultrastructure and initiation of oxidative stress [2, 3]. Antioxidant enzymes are one mechanism plants have evolved as a response to metal-induced toxicity [4]. For example, guaiacol peroxidase (POD), ascorbate peroxidase (APX), superoxidase dismutase (SOD), and catalase (CAT) significantly contribute to regulate the cellular redox homeostasis to a safe level [5]. The present study investigates the biochemical effects of metal ions-poisoning on plants from a Lamiaceae and Brassicaceae families.