Variations in compositions and antioxidant activities of essential oils from leaves of Luodian Blumea balsamifera from different harvest times in China.

Yuan-Hui Wang,Ya-Ru Zhang,Ram Roshan Sharma

doi:10.1371/journal.pone.0234661

Yuan-Hui Wang, Ya-Ru Zhang + Show 1 more

Open Access

https://doi.org/10.1371/journal.pone.0234661

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Journal: PloS one	Publication Date: Jun 16, 2020
Citations: 17	License type: CC BY 4.0

Affiliation: Henan University of Technology

Abstract

Xanthoxylin was the main compound (content 44.92% of total volatiles) in the leaves of Luodian B. balsamifera, which might be the key cause of failure in collecting essential oil (EO) of the leaves using general hydrodistillation in Clevenger apparatus. A modified hydrodistillation equipped with Clevenger apparatus was designed for isolating EO from the leaves. Six EOs of Luodian B. balsamifera harvested once a month from September to next February were collected successfully. The main components of EOs were δ-elemene, α-cubenene, caryophyllene, caryophyllene epoxide, γ-eudesmol, xanthoxylin, and α-eudesmol. The EOs of Luodian B. balsamifera collected from October to December had higher antioxidant activities (ACs). Combining the principal component analysis of chemical components with the results of ACs and the yields of six EOs, the leaves of Luodian B. balsamifera were suitable to be harvested in November and December to obtain EO with high quality.

Highlights

Blumea balsamifera (L.) DC. (Asteraceae) is an aromatic plant and a traditional herb cultivated in East Asia and Southeast Asia [1,2]
In the general hydrodistillation process, essential oil (EO) should float on the surface of aqueous phase and be collected in Clevenger apparatus (Fig 1A) [19]
EO was not collected on the surface of aqueous phase, while a white volatile matter (WV) and an aqueous phase (AP) were observed in the condenser and collecting tube

Summary

Introduction

Blumea balsamifera (L.) DC. (Asteraceae) is an aromatic plant and a traditional herb cultivated in East Asia and Southeast Asia [1,2]. (Asteraceae) is an aromatic plant and a traditional herb cultivated in East Asia and Southeast Asia [1,2]. The leaves of B. balsamifera are rich in volatile compounds and can be used to collect essential oil (EO), and EO is found to possess antimicrobial and insecticidal activities [3,4,5,6]. B. balsamifera, named Ainaxiang, harvested from Yunnan and Hainan Province, China, had been used to extracted EOs using hydrodistillation according to the method noted in Pharmacopoeia of the People’s Republic of China, and the compositions and antioxidant activities of EOs of different plant organs from B. balsamifera at different growth times were analysed and evaluated [13]. The volatile oil of Luodian B. balsamifera had been extracted by hydrodistillation and organic solvent extraction in previous

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Conclusion