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2021, Number 2

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Rev Cubana Plant Med 2021; 26 (2)

Leaf morphology of Raulinoreitzia crenulata and antioxidant activity of its essential oils

Pereira MFAC, Batista TM, Loureiro SFA, de Souza LF, de Souza CCF

Language: Spanish
References: 18
Page:
PDF size: 406.68 Kb.


ABSTRACT

Introduction: The species Raulinoreitzia crenulata grows in open forest areas of south, southeast, northeast and center-west Brazil and Bolivia.
Objective: Evaluate the leaf morphology of R. crenulata and the antioxidant activity of essential oils from its leaves, branches and flowers.
Methods: Diaphanization was performed with two dyes, safranin and toluidine blue for venation patterns. The leaf, branch and flower oils were extracted in a Clevenger set and their yield was determined. Antioxidant activity was identified with the free radical DPPH at various concentrations: 50-1.0 mg ml-1.
Results: R. crenulata leaves are opposite, with the first vein acrodrome, anomocytic stomata on both sides, more abundant on the abaxial side, and presence of glandular trichomes and tectors. Their venation pattern covers up to the fourth order, FEVs with three branches, full areolae with four or five sides, without the presence of marginal nerves. Essential oil output was 0.533%, 0.437% and 0.461% for leaves, branches and flowers, respectively. Antioxidant activity displayed a 100% reduction at concentrations of 20-50 mg ml-1 for branch and flower oils and 10 mg ml-1 for leaf oils.
Conclusions: The results obtained from the leaf morphology analysis of Raulinoreitzia crenulata will be included in studies aimed at characterizing this species as well as the remaining taxa of the genus Eupatorium. Essential oil content displayed high potential, placing R. crenulata among the possible sources of essential oils with important biological activity in the reduction of DPPH free radicals.


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