Bioactive phenolic compounds are powerful antioxidants in traditionally used medicinal and industrial crop plants and have attracted increased interest in the last years in their application and role in non-destructive methodology for pre-screening analysis of some stress factors. In this study the qualitative target was linked with future possible applications of received data for improving non-destructive methodology as well as for improving existing knowledge regarding antioxidant content in some plant species. Comparative analysis of total phenolics, flavonoid contents, phenolic acid composition, and antioxidant activity in known east central Europe medicinal and industrial crop plants of 26 species of families , and was done. Among the investigated leaf extracts the highest total phenolic, total flavonoid contents and antioxidant activity have been seen for L. (), L. () and for L. (). The highest syringic acid content has been found in the leaf extracts of plant family - in the range from 0.782 to 5.078 mg g DW. The representative's family has a higher content of p-anisic acid in the range 0.334-3.442 mg gDW compared to the leaf extracts of families and. The comparative study showed significant differences of content of phenolic acids in the leaf extracts of different representative's families , and . We suggest that the presence of some phenolic acids can be used as a possible marker for family botanical specifications of representative families and . It was supposed that some pharmacological effects can be connected with the analyzed data.
BackgroundEffect of chlorocholine chloride (CCC) on phenolic acids composition and polyphenols accumulation in various anatomical parts (stems, leaves and inflorescences) of common buckwheat (Fagopyrum esculentum Moench) in the early stages of vegetation period were surveyed.ResultsTreatment of buckwheat seeds with 2% of CCC has been increased content of total phenolics in the stems, leaves and inflorescences. On analyzing the different parts of buckwheat plants, 9 different phenolic acids – vanilic acid, ferulic acid, trans-ferulic acid, chlorogenic acid, salycilic acid, cinamic acid, p-coumaric acid, p-anisic acid, methoxycinamic acid and catechins were identified. The levels of identified phenolic acids varied not only significantly among the plant organs but also between early stages of vegetation period. Same changes as in contents of chlorogenic acid, ferulic acid, trans-ferulic acid were found for content of salycilic acid. The content of these phenolic acids has been significant increased under effect of 2% CCC treatment at the phase I (formation of buds) in the stems and at the phase II (beginning of flowering) in the leaves and then inflorescences respectively. The content of catechins as potential buckwheat antioxidants has been increased at the early stages of vegetation period after treatment with 2% CCC.ConclusionsThe obtained results suggest that influence of CCC on the phenolics composition can be a result of various mechanisms of CCC uptake, transforming and/or its translocation in the buckwheat seedlings.
The present experimental study has been investigated way of use methodology of nondestructive detection with hyperspectral reflectance imaging together with wet chemistry quantitative analysis based on correlation analysis of receiving data. Higher correlation from reflectance of hyperspectral imaging analysis and total polyphenol and anthocyanin content has been observed for carotenoid reflectance index-2 compared to the carotenoid reflectance index-1. It was found that high total polyphenols content is related with high values of hyperspectral indices which characterize chlorophyll concentration and parameters of vegetation. In experimental buckwheat cultivars presence of vanillic, methoxycinnamic, cinnamic acids can be expressing by anthocyanin reflectance index, modified anthocyanin reflectance index and carotenoid reflectance index-2 because high correlation coefficient. Changes of chlorogenic acid during the vegetative period of plant growth can be studied with normalized difference vegetation index and normalized difference vegetation index-2 which found to have a positive correlation with this phenolic acid content. 864Journal of Central European Agriculture, 2017, 18(4), p.864-878 DOI: 10.5513/JCEA01/18.4.1978 864 Journal of Central European Agriculture, 2017, 18(4) , p.864-878 DOI: 10.5513/JCEA01/18.4.1978 864 Journal of Central European Agriculture, 2017, 18(4), p.864-878 DOI: 10.5513/JCEA01/18.4.1978 864 Journal of Central European Agriculture, 2017, 18(4), p.864-878 DOI: 10.5513/JCEA01/18.4.1978 864 Journal of Central European Agriculture, 2017, 18(4 AbstraktPredkladaná experimentálna práca skúmala možnosti uplatnenia metodológie nedeštrukčnej detekcie s hyperspektrálnym reflektančným zobrazovaním spolu s kvantitatívnou chemickou analýzou na základe korelačnej analýzy získaných údajov. V porovnaní s karotenoidovým reflektančným indexom-1 bola vyššia korelácia s obsahom celkových polyfenolov a celkových antokyánov pozorovaná s reflektanciou karotenoidového reflektančného indexu-2 z analýzy hyperspektrálneho zobrazovania. Vysoký obsah celkových polyfenolov súvisel s vysokými hodnotami hyperspektrálnych indexov charakterizujúcich koncentráciu chlorofylu a parametre vegetácie. V experimentálnych kultivaroch pohánky môže byť prítomnosť kyseliny vanilovej, metoxyškoricovej a škoricovej, vzhľadom k vysokému korelačnému koeficientu, vyjadrená pomocou antokyánového reflektančného indexu, modifikovaného antokyánového reflektančného indexu a karotenoidového reflektančného indexu-2. Zmeny obsahu kyseliny chlorogénovej počas vegetačného obdobia pohánky môžu byť sledované prostredníctvom normalizovaného diferenčného vegetačného indexu a diferenčného vegetačného indexu-2, ktoré preukázali pozitívnu koreláciu s obsahom fenolových kyselín.
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