Bioprospecting of strawberry guava leaf essential oil in Caxias do Sul region, South Brazil

W. Silvestre, Luanna Mazzotti, Gabriel Fernandes Pauletti
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引用次数: 1

Abstract

The strawberry guava (Psidium cattleianum Sabine) is a fruit species native from South-Southeast Brazil whose leaf essential oil has potential for commercial uses due to its bioactive properties. However, little is known about the influence of the geographical distribution in small scale on P. cattleianum essential oil chemical composition and yield. The present work aimed to evaluate the yield and chemical composition of the leaf essential oil of P. cattleianum populations in the region of Caxias do Sul, South Brazil. Samples of twelve populations were collected and the essential oil was extracted by hydrodistillation. The chemical composition of the essential oils was determined by GC/MS and GC-FID. The results showed a high variability of essential oil yield, which ranged between 0.08 and 0.75% v/w. Regarding the chemical profiles, nine populations presented the 1,8-cineole chemotype, the β-caryophyllene chemotype was observed in two of them, and in one population there were four major compounds. Both hierarchical cluster and principal component analyses showed differences in essential oil composition in populations geographically close, indicating the existence of an important genetic variability in populations of the same geographical area.
巴西南部南卡西亚斯地区草莓番石榴叶精油的生物勘探
草莓番石榴(Psidium catleanum Sabine)是一种原产于巴西东南部东南部的水果,其叶子精油因其生物活性特性而具有潜在的商业用途。然而,小尺度地理分布对牛皮草挥发油化学成分和产量的影响尚不清楚。本研究旨在对巴西南部南卡西亚斯(Caxias do Sul)地区牛颡鱼(P. catleanum)种群叶精油的产量和化学成分进行评价。收集了12个种群的样品,采用水蒸气蒸馏法提取精油。采用GC/MS和GC- fid对精油的化学成分进行了测定。结果表明,精油得率在0.08 ~ 0.75% v/w之间变化很大。在化学图谱上,9个居群为1,8-桉树脑化学型,2个居群为β-石竹烯化学型,1个居群中有4个主要化合物。层次聚类分析和主成分分析均显示地理位置相近的人群中精油成分存在差异,表明同一地理区域的人群中存在重要的遗传变异。
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