Changes in the composition of the leaf oil from Baccharis punctulata D.C. specimens from Argentina depend on the different stages of the plant through the year

IF 2.2 3区农林科学 Q3 CHEMISTRY, APPLIED

Journal of Essential Oil Research Pub Date : 2022-12-28 DOI:10.1080/10412905.2022.2160844

María Dolores Herrera Gonzalez

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Abstract

ABSTRACT The leaf oil from Baccharis punctulata D.C. specimens from Argentina, analyzed by GC and GC/MS during a one-year phenological cycle, showed important changes. In spring and summer, during the stem and floral bud development, the percentages of amorpha-4,7(11)-diene, amorpha-4-en-7-ol, amorpha-4,7-diene-11-ol and amorpha-4,7(11)-dien-8-one increased, while the percentage of verboccidentafuran decreased (c.a. 50% to 10%). The percentage of the guaiane alismol, which was negligible in other months, also increased (19.1–24.8 %). Alismol structure was spectroscopically established. Interesting, when buds opened, alismol percentage fell, so pre- and full-flowering oil composition resulted very different. Germacra-1(10),5-dien-4α-ol (16.7–23.0 %), verboccidentafuran (16.1–18.4%) and elemane-type sesquiterpenes were main components at flowering. Germacra-1(10),5-dien-4α-ol may have the adequate configuration and conformation to be biosynthetically related to alismol. Finally, germacra-1(10),5-dien-4α-ol and elemene derivative percentages decreased. Verboccidentafuran (27.6–52.4%) was the main compound in winter. These cyclic changes appear to be associated with the phenological stages of the plant during the year.

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来自阿根廷的斑马酒(Baccharis punctulata dc)标本的叶油成分的变化取决于该植物在一年中不同的生长阶段

摘要/ ABSTRACT摘要:采用气相色谱和气相色谱/质谱分析了阿根廷马刺酒(Baccharis punctulata dc)叶油在1年物候周期内的变化。在春夏两季，在茎和花芽发育过程中，4、7-二烯、4-烯-7-醇、4、7-二烯-11-醇和4、7-烯-8- 1的含量增加，而4、7-烯-8- 1的含量减少(约为50% ~ 10%)。在其他月份可以忽略的愈创木烷的比例也有所增加(19.1 - 24.8%)。通过光谱分析确定了其结构。有趣的是，当花蕾开放时，alismol含量下降，因此开花前和盛开时的油成分差异很大。开花时主要成分为德国红-1(10)、5-二烯-4α-醇(16.7 ~ 23.0%)、verboccentafuran(16.1 ~ 18.4%)和烯型倍半萜。Germacra-1(10)，5-二烯-4α-醇可能具有与alismol生物合成相关的适当构型和构象。最后，赤藓-1(10)、5-二烯-4α-醇和榄香烯衍生物的百分比下降。冬季主要化合物为verboccentafuran(27.6 ~ 52.4%)。这些循环变化似乎与植物在一年中的物候阶段有关。

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来源期刊

Journal of Essential Oil Research 工程技术-食品科技

CiteScore

6.00

自引率

3.30%

发文量

审稿时长

18-36 weeks

期刊介绍： Journal of Essential Oil Research ( JEOR) is the major forum for the publication of essential oil research and analysis. Each issue includes studies performed on the chemical composition of some of the 20,000 aromatic plants known in the plant kingdom. JEOR is devoted entirely to all phases of research from every corner of the world by the experts in their field. JEOR''s main areas of focus include: -Analytical chemistry- Biological activity- Biotechnology- Chemical composition- Chemical synthesis- Chemosystematics- Microbiological activity- Plant biochemistry/biosynthesis- Toxicology. Published six times per year, JEOR provides articles on the aromatic principles of a plant or its isolates and are directed toward furthering our readers'' knowledge of the aromatic plant and animal kingdoms.