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Chemical composition of the essential oils of circadian rhythm and of different vegetative parts from Piper mollicomum Kunth - A medicinal plant from Brazil
Biochemical Systematics and Ecology ( IF 1.4 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.bse.2020.104116
Ygor Jessé Ramos , Daniel de Brito Machado , George Azevedo de Queiroz , Elsie Franklin Guimarães , Anna Carina Antunes e Defaveri , Davyson de Lima Moreira

Abstract In this study, the chemical composition of essential oils (EOs) from different vegetative parts from P. mollicomum was evaluated. In addition, the EOs from leaves collected every 3 h in a period of 24 h, in the dry and rainy seasons were also analyzed to establish the circadian rhythm of P. mollicomum from a natural population in the Atlantic Forest. The EOs were obtained by hydrodistillation and the chemical composition and quantification were achieved by GC-MS and GC-FID, respectively. The main compounds identified in the main stems and branches were α-phellandrene, linalool and β-phellandrene. Arylpropanoids myristicin, dillapiole and apiole were identified as main compounds in the roots. Inflorescences and infructescences showed to be rich in linalool, eupatoriocromene and E-nerolidol. In the circardian rhythm study, EOs showed to be rich in 1,8-cienol and/or linalool in accordance with season and phenology. The chemometric analyzes made it possible to register sample variations in the EOs compositions, being linalool as major compound attributed to the rainy and vegetative phase periods. Monoterpene 1,8-cineole was characterized as the main compound in the dry and reproductive phase periods. The same chemometric features allowed to stablished differences considering vegetative parts as a clear grouping of the EOs by biosynthetic pathway. In summary, there are great differences in the EOs composition, considering phenology, seasonality and vegetative parts. These results are very important since P. mollicomum has been used as medicinal plant for many years.

中文翻译:

来自巴西药用植物 Piper mollicomum Kunth 的昼夜节律精油和不同营养部分的化学成分

摘要 在这项研究中,评估了来自 P. mollicomum 不同营养部分的精油 (EOs) 的化学成分。此外,还分析了旱季和雨季在 24 小时内每 3 小时收集一次叶子的 EO,以建立大西洋森林自然种群 P. mollicomum 的昼夜节律。EOs 通过水蒸馏获得,化学成分和定量分别通过 GC-MS 和 GC-FID 实现。在主茎和枝条中鉴定的主要化合物是α-水芹烯、芳樟醇和β-水芹烯。芳基丙烷肉豆蔻素、dillapiole 和apiole 被确定为根中的主要化合物。花序和果序显示出富含芳樟醇、eupatoriocromene 和 E-橙花醇。在昼夜节律研究中,根据季节和物候,EO 显示出富含 1,8-硫烯醇和/或芳樟醇。化学计量分析使得记录 EO 组成中的样品变化成为可能,芳樟醇​​作为归因于雨季和营养期的主要化合物。单萜 1,8-桉树脑被表征为干燥期和生殖期的主要化合物。相同的化学计量特征允许稳定差异,将植物部分视为通过生物合成途径对 EO 进行明确分组。总之,考虑到物候、季节性和植物部分,EOs 的组成存在很大差异。这些结果非常重要,因为 P. mollicomum 已被用作药用植物多年。化学计量分析使得记录 EO 组成中的样品变化成为可能,芳樟醇​​作为归因于雨季和营养期的主要化合物。单萜 1,8-桉树脑被表征为干燥期和生殖期的主要化合物。相同的化学计量特征允许稳定差异,将植物部分视为通过生物合成途径对 EO 进行明确分组。总之,考虑到物候、季节性和植物部分,EOs 的组成存在很大差异。这些结果非常重要,因为 P. mollicomum 已被用作药用植物多年。化学计量分析使得记录 EO 组成中的样品变化成为可能,芳樟醇​​作为归因于雨季和营养期的主要化合物。单萜 1,8-桉树脑被表征为干燥期和生殖期的主要化合物。相同的化学计量特征允许稳定差异,将植物部分视为通过生物合成途径对 EO 进行明确分组。总之,考虑到物候、季节性和植物部分,EOs 的组成存在很大差异。这些结果非常重要,因为 P. mollicomum 已被用作药用植物多年。8-桉树脑被表征为干燥期和生殖期的主要化合物。相同的化学计量特征允许稳定差异,将植物部分视为通过生物合成途径对 EO 进行明确分组。总之,考虑到物候、季节性和植物部分,EOs 的组成存在很大差异。这些结果非常重要,因为 P. mollicomum 已被用作药用植物多年。8-桉树脑被表征为干燥期和生殖期的主要化合物。相同的化学计量特征允许稳定差异,将植物部分视为通过生物合成途径对 EO 进行明确分组。总之,考虑到物候、季节性和植物部分,EOs 的组成存在很大差异。这些结果非常重要,因为 P. mollicomum 已被用作药用植物多年。
更新日期:2020-10-01
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