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Allelopathic Potential and Chemical Composition of Essential Oil from the Invasive Plant Acmella radicans

文献类型： 外文期刊

作者： Yang, Kexin 1 ; Yang, Yunhai 1 ; Wu, Xiaohan 1 ; Zheng, Fengping 1 ; Xu, Gaofeng 1 ; Yang, Shaosong 1 ; Jin, Guimei 1 ; Clements, David Roy 5 ; Shen, Shicai 1 ; Zhang, Fudou 1 ;

作者机构： 1.Agr Environm & Resource Res Inst, Yunnan Acad Agr Sci, Key Lab Prevent & Control Biol Invas, Minist Agr & Rural Affairs China, Kunming 650205, Peoples R China

2.Yunnan Univ, Sch Agr, Kunming 650504, Peoples R China

3.Yunnan Acad Agr Sci, Agr Environm & Resource Res Inst, Key Lab Green Prevent & Control Agr Transboundary, Kunming 650205, Peoples R China

4.Yunnan Lancang Mekong Agr Biosecur Int Sci & Techn, Kunming 650205, Peoples R China

5.Trinity Western Univ, Dept Biol, Langley, BC V2Y 1Y1, Canada

关键词： alien plants; bioassays; phytotoxic; competitive ability; GC-MS; extraction

期刊名称：AGRONOMY-BASEL （ 影响因子：3.7； 五年影响因子：4.0 ）

ISSN：

年卷期： 2024 年 14 卷 2 期

页码：

收录情况： SCI

摘要： Acmella radicans (Jacquin) R.K. Jansen is a new invasive species recorded in Yunnan Province, China, and little is known about its allelopathic potential and allelochemicals. In this study, the allelopathic effects of the essential oil (EO) of A. radicans on seed germination and seedling growth of four common plants, Brassica napus, Brassica rapa ssp. chinensis, Digitaria sanguinalis, and Lolium multiflorum, were explored. The results showed that the seed germination index, germination rate, root length, stem length, and biomass of B. napus and B. rapa ssp. chinensis were significantly inhibited at all EO concentrations of A. radicans, but there was a 'low-promotion and high-inhibition effect' on the root length of D. sanguinalis and L. multiflorum at low concentrations of 0.5 mu LmL(-1) and 0.5-1.0 mu LmL(-1), respectively. With increasing concentrations of EO, the inhibition rates of seed germination and seedling growth of four common plants gradually increased, and D. sanguinalis and L. multiflorum were the most inhibited, followed by B. rapa ssp. chinensis, and the least inhibited was B. napus. Thirty-two components were identified using GC-MS, representing 99.07% of the EO in A. radicans. The major components were 2-tridecanone (30.46%), caryophyllene oxide (19.18%), 4,8,11,11-tetramethylbicyclo[7.2.0]undec-3-en-5-ol (7.84%), beta-caryophyllene (7.67%), and widdrol (4.7%). Among the compounds we identified, (E,E)-2,4-decadienal, 2-tridecanone, gamma-cadinene, delta-cadinene, (E)-alpha-cadinol, spathulenol, caryophyllene oxide, and widdrol have been previously reported as having possible allelopathic effects. Our study was the first to show that A. radicans could potentially release allelochemicals to influence neighboring plants during its invasion and expansion.

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