Weed suppression and antioxidant activity of Astragalus sinicus L. decomposition leachates
Astragalus sinicus L. (milk vetch), a versatile plant that has a soil-enriching effect as green manure, is widely planted in the temperate zone of China. In previous experiments, milk vetch incorporated into the soil as green manure showed potential for goosegrass control. However, “what exactly hap...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-11-01
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| Series: | Frontiers in Plant Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fpls.2022.1013443/full |
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| author | Silin Liu Wenhui Wang Jiaoyun Chen Zhiyu Ma Youping Xiao Zhongwen Chen Ying Zhang Xiao Du Yinghui Mu Yinghui Mu |
| author_facet | Silin Liu Wenhui Wang Jiaoyun Chen Zhiyu Ma Youping Xiao Zhongwen Chen Ying Zhang Xiao Du Yinghui Mu Yinghui Mu |
| author_sort | Silin Liu |
| collection | DOAJ |
| description | Astragalus sinicus L. (milk vetch), a versatile plant that has a soil-enriching effect as green manure, is widely planted in the temperate zone of China. In previous experiments, milk vetch incorporated into the soil as green manure showed potential for goosegrass control. However, “what exactly happens at the chemical level?” and “what are the compounds that are potentially responsible for the phytotoxic effects observed during those previous assays?” In a recent study, in vitro phytotoxicity bioassays and chemical analyses of milk vetch decomposition leachates were carried out to explore the relationship between the temporal phytotoxic effects and the dynamics of chemical composition. For that, milk vetch decomposition leachates with a decay time of 12 h, 9 days, 12 days, 15 days, and 18 days were analyzed for organic compounds by liquid chromatography. The main results were as follows: (1) three compounds with goosegrass suppression potential produced during the decomposed process, i.e., 4-ethylphenol, N-acrylimorpholine, and allyl isothiocyanate. 2-Hydroxyethyl acrylate was present in the 12-h decomposition leachates but was at its highest concentration of 127.1 µg ml−1 at 15 days. (2) The cultures were configured according to the four concentrations of goosegrass-resistant active substances measured in the 15-day decomposition leachate and, as with the 15-day decomposition leachate, the mixture cultures inhibited 100% of goosegrass germination at the high concentrations (≥ 30%), which suggests that these substances have goosegrass suppression potential. (3) The high total phenolic content (302.8–532.3 mg L−1), the total flavonoid content (8.4–72.1 mg L−1), and the reducing activity of the decomposition leachates for different decay times may explain why the incorporation of milk vetch into the soil did not lead to peroxidation of goosegrass in the previous study. (4) Finally, the changes in acid fraction and total content (1.9–4.2 mg ml−1) for different decay times explain the variations in pH of the decomposition leachates, which, when discussed in conjunction with previous studies, may lead to changes in soil nutrient effectiveness and consequently affect crop growth. This study can provide a reference for green weed control research. |
| first_indexed | 2024-04-12T09:18:10Z |
| format | Article |
| id | doaj.art-511ef4f9865343f2bd13dfe4cc1796bc |
| institution | Directory Open Access Journal |
| issn | 1664-462X |
| language | English |
| last_indexed | 2024-04-12T09:18:10Z |
| publishDate | 2022-11-01 |
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| spelling | doaj.art-511ef4f9865343f2bd13dfe4cc1796bc2022-12-22T03:38:46ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2022-11-011310.3389/fpls.2022.10134431013443Weed suppression and antioxidant activity of Astragalus sinicus L. decomposition leachatesSilin Liu0Wenhui Wang1Jiaoyun Chen2Zhiyu Ma3Youping Xiao4Zhongwen Chen5Ying Zhang6Xiao Du7Yinghui Mu8Yinghui Mu9College of Agriculture, South China Agricultural University, Guangzhou, ChinaCollege of Agriculture, South China Agricultural University, Guangzhou, ChinaCollege of Agriculture, South China Agricultural University, Guangzhou, ChinaZhongkai University of Agriculture and Engineering, Guangzhou, ChinaCollege of Agriculture, South China Agricultural University, Guangzhou, ChinaCollege of Agriculture, South China Agricultural University, Guangzhou, ChinaCollege of Agriculture, South China Agricultural University, Guangzhou, ChinaCollege of Agriculture, South China Agricultural University, Guangzhou, ChinaCollege of Agriculture, South China Agricultural University, Guangzhou, ChinaScientific Observing and Experimental Station of Crop Cultivation in South China, College of Agronomy/Ministry of Agriculture and Rural Affairs, Guangzhou, ChinaAstragalus sinicus L. (milk vetch), a versatile plant that has a soil-enriching effect as green manure, is widely planted in the temperate zone of China. In previous experiments, milk vetch incorporated into the soil as green manure showed potential for goosegrass control. However, “what exactly happens at the chemical level?” and “what are the compounds that are potentially responsible for the phytotoxic effects observed during those previous assays?” In a recent study, in vitro phytotoxicity bioassays and chemical analyses of milk vetch decomposition leachates were carried out to explore the relationship between the temporal phytotoxic effects and the dynamics of chemical composition. For that, milk vetch decomposition leachates with a decay time of 12 h, 9 days, 12 days, 15 days, and 18 days were analyzed for organic compounds by liquid chromatography. The main results were as follows: (1) three compounds with goosegrass suppression potential produced during the decomposed process, i.e., 4-ethylphenol, N-acrylimorpholine, and allyl isothiocyanate. 2-Hydroxyethyl acrylate was present in the 12-h decomposition leachates but was at its highest concentration of 127.1 µg ml−1 at 15 days. (2) The cultures were configured according to the four concentrations of goosegrass-resistant active substances measured in the 15-day decomposition leachate and, as with the 15-day decomposition leachate, the mixture cultures inhibited 100% of goosegrass germination at the high concentrations (≥ 30%), which suggests that these substances have goosegrass suppression potential. (3) The high total phenolic content (302.8–532.3 mg L−1), the total flavonoid content (8.4–72.1 mg L−1), and the reducing activity of the decomposition leachates for different decay times may explain why the incorporation of milk vetch into the soil did not lead to peroxidation of goosegrass in the previous study. (4) Finally, the changes in acid fraction and total content (1.9–4.2 mg ml−1) for different decay times explain the variations in pH of the decomposition leachates, which, when discussed in conjunction with previous studies, may lead to changes in soil nutrient effectiveness and consequently affect crop growth. This study can provide a reference for green weed control research.https://www.frontiersin.org/articles/10.3389/fpls.2022.1013443/fullmilk vetchgoosegrass suppressionchemical compoundsphytotoxicityantioxidant activityacid compounds |
| spellingShingle | Silin Liu Wenhui Wang Jiaoyun Chen Zhiyu Ma Youping Xiao Zhongwen Chen Ying Zhang Xiao Du Yinghui Mu Yinghui Mu Weed suppression and antioxidant activity of Astragalus sinicus L. decomposition leachates Frontiers in Plant Science milk vetch goosegrass suppression chemical compounds phytotoxicity antioxidant activity acid compounds |
| title | Weed suppression and antioxidant activity of Astragalus sinicus L. decomposition leachates |
| title_full | Weed suppression and antioxidant activity of Astragalus sinicus L. decomposition leachates |
| title_fullStr | Weed suppression and antioxidant activity of Astragalus sinicus L. decomposition leachates |
| title_full_unstemmed | Weed suppression and antioxidant activity of Astragalus sinicus L. decomposition leachates |
| title_short | Weed suppression and antioxidant activity of Astragalus sinicus L. decomposition leachates |
| title_sort | weed suppression and antioxidant activity of astragalus sinicus l decomposition leachates |
| topic | milk vetch goosegrass suppression chemical compounds phytotoxicity antioxidant activity acid compounds |
| url | https://www.frontiersin.org/articles/10.3389/fpls.2022.1013443/full |
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