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Inhibitory activities of essential oils from Syzygium aromaticum inhibition of Echinochloa crus-galli

文献类型： 外文期刊

作者： Ni, Xianzhi 1 ; Bai, Haodong 1 ; Han, Jincai 2 ; Zhou, Yong 2 ; Bai, Zhendong 1 ; Luo, Siquan 1 ; Xu, Jingjing 2 ; Jin, Chenzhong 1 ; Li, Zuren 1 ;

作者机构： 1.Hunan Univ Humanities, Collaborat Innovat Ctr Field Weeds Control Sci & T, Hunan Prov Key Lab Biol & Control Weeds, Loudi, Peoples R China

2.Hunan Acad Agr Sci, Key Lab Pesticide Assessment, Minist Agr & Rural Affairs, Changsha, Peoples R China

期刊名称：PLOS ONE （ 影响因子：2.9； 五年影响因子：3.3 ）

ISSN： 1932-6203

年卷期： 2024 年 19 卷 6 期

页码：

收录情况： SCI

摘要： Echinochloa crus-galli is a serious weed species in rice paddies. To obtain a new potential bioherbicide, we evaluated the inhibitory activities of 13 essential oils and their active substances against E. crus-galli. Essential oil from Syzygium aromaticum (L.) Merr. & L. M. Perry (SAEO) exhibited the highest herbicidal activity (EC50 = 3.87 mg mL(-1)) among the 13 essential oils evaluated. The SAEO was isolated at six different temperatures by vacuum fractional distillation, including 164 degrees C, 165 degrees C (SAEO-165), 169 degrees C, 170 degrees C 175 degrees C and 180 degrees C. The SAEO-165 had the highest inhibitory rate against E. crus-galli. Gas chromatography-mass spectrometry and high phase liquid chromatography identified eugenol (EC50 = 4.07 mg mL(-1)), alpha-caryophyllene (EC50 = 17.34 mg mL(-1)) and beta-caryophyllene (EC50 = 96.66 mg mL(-1)) as the three compounds in SAEO. Results from a safety bioassay showed that the tolerance of rice seedling (similar to 20% inhibition) was higher than that of E. crus-galli (similar to 70% inhibition) under SAEO stress. SAEO induced excessive generation of reactive oxygen species leading to oxidative stress and ultimately tissue damage in E. crus-galli. Our results indicate that SAEO has a potential for development into a new selective bio-herbicide. They also provide an example of a sustainable management strategy for E. crus-galli in rice paddies.

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