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Allelochemicals Identified From Sweet Potato (Ipomoea batatas) and Their Allelopathic Effects on Invasive Alien Plants

文献类型： 外文期刊

作者： Shen, Shicai 1 ; Ma, Guangzong 1 ; Xu, Gaofeng 1 ; Li, Diyu 1 ; Jin, Guimei 1 ; Yang, Shaosong 1 ; Clements, David Roy 4 ; Chen, Aidong 1 ; Wen, Lina 1 ; Zhang, Fudou 1 ; Ye, Min 3 ;

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

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

3.Yunnan Agr Univ, State Key Lab Conservat & Utilizat Bioresources Yu, Kunming, Peoples R China

4.Trinity Western Univ, Dept Biol, Langley, BC, Canada

关键词： sweet potato; allelochemicals; allelopathic effects; invasive plants; weed management

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：6.627； 五年影响因子：7.255 ）

ISSN： 1664-462X

年卷期： 2022 年 13 卷

页码：

收录情况： SCI

摘要： Sweet potato [Ipomoea batatas (L.) Lam] is grown as important cash and food crop worldwide and has been shown to exhibit allelopathic effects on other plants. However, its metabolome has not been studied extensively, particularly with respect to the production of phytotoxic bioactive secondary products. In this study, the chemical composition of petroleum ether extract of sweet potato was characterized, and the morphological and physiological effects of some individual components against four invasive alien weeds Bidens pilosa L., Galinsoga parviflora Cav., Lolium multiflorum Lam., and Phalaris minor Retz. were determined. Twenty-one components were identified by GS-MS, constituting 96.08% of petroleum ether extract in sweet potato. The major components were palmitic acid (PA) (17.48%), ethyl linoleate (EL) (13.19%), linoleic acid (LA) (12.55%), ethyl palmitate (EP) (11.77%), ethyl linolenate (ELL) (8.29%) oleic acid (5.82%), ethyl stearate (4.19%), and 3-methylphenol acetate (3.19%). The five most abundant compounds exhibited strong inhibition activity against the four invasive weeds tested. The highest inhibition rates were seen for LA, followed by PA and EP, respectively. Catalase (CAT), malondialdehyde (MDA), and peroxidase (POD) content of L. multiflorum were increased by the three allelochemicals, i.e., LA, PA and EP, but superoxide dismutase (SOD), chlorophyll-a and chlorophyll-b levels declined. Overall, the combined impact of all five compounds could be quite effective in suppressing the invasive weeds of concern.

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