Gaistošie savienojumi Rugosas hibrīdu rožu ziedlapās un hidrosolā | Volatile organic compounds of Hybrid Rugosa roses in Latvia
2015
Sparinska, A., University of Latvia, Riga (Latvia). Botanical Garden | Rostoks, N., University of Latvia, Riga (Latvia). Faculty of Biology
Latvian. Rugosas hibrīdi ir viena no visizturīgākajām dārza rožu grupām Baltijas jūras klimatā. Šī pētījuma mērķis ir identificēt jaunas, Latvijā neizmantotas, Rugosas hibrīdu ziedu kvalitātes, pārbaudot šķirņu piemērotību rožu hidrozola jeb rožūdens ieguvei. Septiņu šķirņu gaistošo savienojumu ekstrakciju veica ar cietās fāzes mikroekstrakciju un tai sekojošu gāzes hromatogrāfiju, iegūtos savienojumus identificēja, izmantojot masu spektru bibliotēku Nist98. Rožu ziedlapās un hidrozolos konstatēja 25 gaistošos savienojumus. Visu šķirņu un Rosa rugosa gaistošie savienojumos izdalīja feniletilspirtu, citronelolu, geraniolu un nerolu. Visaugstākais savienojumu daudzums bija R. rugosa un ‘Plena’, attiecīgi 26% un 31% citronelola. No hidrosola tika izdalīti savienojumi līdzīgās proporcijās, bet divreiz lielākā daudzumā, nekā ziedlapās. No Latvijā selekcionētajām šķirnēm kā rožūdens avots būtu iesakāmas šķirnes ‘Raita’ un ‘Violeta’.
Show more [+] Less [-]English. Hybrid Rugosa is the most winter hardy group of roses in the climatic conditions of the Baltic Sea region. This study aimed at identifying new qualities of Hybrid Rugosa by focusing on determination of content of volatile organic compounds of flower petals and in hydrosols produced from these. Volatiles of seven cultivars were extracted using solid phase microextraction (SPME) with subsequent separation by gas chromatography. Identification was made by comparison with mass spectral libraries and by calculating linear retention indexes and comparing them with literature data. Twenty-five volatile aroma compounds were identified in the petals and hydrosols of six Hybrid Rugosa and species. Among those, phenylethylalcohol, ß-citronellol, geraniol and nerol were predominant. Species Rosa rugosa and variety ‘Plena’ showed the highest total level of volatiles and contained 26% and 31% ß-citronellol, respectively. Varieties ‘Raita’ and ‘Sniedze’ contained up to 57% citronellol. The main volatile compounds were detected in hydrosols in the same proportions, but their concentration was higher than in petals. The varieties ‘Raita’ and ‘Violeta’, bred in Latvia, are recommendable for use as a source of hydrosol.
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