Abstract
Anthocyanins are plant pigments of economic interest, due to their use as natural colorants, as well as their pharmacological application. Analysis of inflorescences of Tarenaya rosea (Vahl ex DC.) Soares Neto & Roalson by high performance liquid chromatography coupled to diode array detector and electrospray ionization mass spectrometry (HPLC-DAD/ESIMS) revealed the presence of acylated cyanidins and a peonidin. Ten anthocyanins acylated with p -coumaric, caffeic, ferulic, sinapic or p- hydroxybenzoic acid were detected. The major peak was identified as cyanidin 3-(p-coumaroyl)(p-coumaroyl) diglucoside-5-glucoside. Two anthocyanins, (cyanidin 3-(p-hydroxybenzoyl) diglucoside-5-glucoside and cyanidin 3-(glycopyranosyl-caffeoyl) diglucoside-5-glucoside), were detected only in the inflorescences when compare to other analyses previously performed with the species. The study of the anthocyanin content in plant species is an important step in the development of strategies for the commercial exploitation of these pigments. The results obtained in the present work showed the diversity of anthocyanins in the inflorescences of T. rosea .
Highlights
Tarenaya rosea (Vahl ex DC.) Soares Neto & Roalson is a Brazilian herbaceous annual species known as “mussambê cor-de-rosa”, frequently found in coastal sandy plains, ecosystems intensely affected by human impact[1]
In continuation to our study of investigating anthocyanins presented in T. rosea, this work was undertaken to characterize the anthocyanins in inflorescences by high performance liquid chromatography coupled to diode array detector and electrospray ionization mass spectrometry (HPLC-DAD/ESIMS)
Ten anthocyanins were found in the inflorescences of T. rosea and fragment ions at m/z 287 and m/z 301 allowed the identification of the aglycones cyanidin and peonidin, respectively
Summary
Tarenaya rosea (Vahl ex DC.) Soares Neto & Roalson is a Brazilian herbaceous annual species known as “mussambê cor-de-rosa”, frequently found in coastal sandy plains (restingas), ecosystems intensely affected by human impact[1]. The pink coloration is provided by anthocyanins, water-soluble plant flavonoids responsible for scarlet to blue colors in flowers, fruits, leaves and storage organs. Some of these pigments are used to color food as substitutes for synthetic red dyes[12] and great attention has been focused on their multifaceted pharmacological potential[13,14]. In continuation to our study of investigating anthocyanins presented in T. rosea, this work was undertaken to characterize the anthocyanins in inflorescences by high performance liquid chromatography coupled to diode array detector and electrospray ionization mass spectrometry (HPLC-DAD/ESIMS)
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