Antioxidant Capacity Changes and Phenolic Profile of Echinacea purpurea, Nettle (Urtica dioica L.), and Dandelion (Taraxacum officinale) after Application of Polyamine and Phenolic Biosynthesis Regulators
| Autor: | Peter Chlebo, Maria Burdova, Vendelín Macho, Grigorij Kogan, Ladislav Komora, Radka Kochanová, and Miroslav Habán, Otto Ložek, Ivan Turianica, Jozef Hudec, Lubomir Kobida |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Hydroxybenzoic acid
Taraxacum Chitin Dandelion Biology Antioxidants Echinacea Caftaric acid chemistry.chemical_compound Flavonols Phenols Taraxacum officinale Botany Polyamines Food science Urtica dioica Glucans chemistry.chemical_classification Cichoric acid General Chemistry Ornithine Decarboxylase Inhibitors carbohydrates (lipids) chemistry Ethanolamines General Agricultural and Biological Sciences |
| Zdroj: | Journal of Agricultural and Food Chemistry. 55:5689-5696 |
| ISSN: | 1520-5118 0021-8561 |
| DOI: | 10.1021/jf070777c |
| Popis: | The changes of the antioxidant (AOA) and antiradical activities (ARA) and the total contents of phenolics, anthocyanins, flavonols, and hydroxybenzoic acid in roots and different aerial sections of Echinacea purpurea, nettle, and dandelion, after treatment with ornithine decarboxylase inhibitor, a polyamine inhibitor (O-phosphoethanolamine, KF), and a phenol biosynthesis stimulator (carboxymethyl chitin glucan, CCHG) were analyzed spectrophotometrically; hydroxycinnamic acids content was analyzed by RP-HPLC with UV detection. Both regulators increased the AOA measured as inhibition of peroxidation (IP) in all herb sections, with the exception of Echinacea stems after treatment with KF. In root tissues IP was dramatically elevated mainly after CCHG application: 8.5-fold in Echinacea, 4.14-fold in nettle, and 2.08-fold in dandelion. ARA decrease of Echinacea leaves treated with regulators was in direct relation only with cichoric acid and caftaric acid contents. Both regulators uphold the formation of cinnamic acid conjugates, the most expressive being that of cichoric acid after treatment with CCHG in Echinacea roots from 2.71 to 20.92 mg g(-1). There was a strong relationship between increase of the total phenolics in all sections of Echinacea, as well as in the studied sections of dandelion, and the anthocyanin content. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|