Assessment of the Phytotoxic Potential of Dregea volubilis (L.f.) Benth. ex Hook.f. and Identification of its Phytotoxic Substances for Weed Control

Ei Han Kyaw, Arihiro Iwasaki, Kiyotake Suenaga and Hisashi Kato-Noguchi ()
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Ei Han Kyaw: Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Miki, Kagawa 761-0795, Japan
Arihiro Iwasaki: Department of Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi, Kohoku, Yokohama 223-8522, Japan
Kiyotake Suenaga: Department of Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi, Kohoku, Yokohama 223-8522, Japan
Hisashi Kato-Noguchi: Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Miki, Kagawa 761-0795, Japan

Agriculture, 2022, vol. 12, issue 11, 1-11

Abstract: The phytotoxic potential of plants and the effect of their active components on another plant species is being explored as a potential alternative to synthetic herbicides for weed control. In the current study, we investigated the phytotoxic potential of the leaves of Dregea volubilis (L.f.) Benth. ex Hook.f. against four test plants [timothy ( Phleum pratense L.), barnyard grass ( Echinochloa crus-galli (L.) P. Beauv), lettuce ( Lactuca sativa L.), and alfalfa ( Medicago sativa L.)] and observed significant growth inhibition on those plants at concentrations >3 mg D.W. equivalent extract mL −1 . A bioassay-governed purification of the D. volubilis extracts using different chromatography phases produced two growth inhibitory compounds, 3-hydroxy-α-ionone (compound 1) and 5-hydroxy-3,4-dimethyl-5-pentylfuran-2(5H)-one (compound 2). The compounds retarded the growth of barnyard grass and cress ( Lepidium sativum L.) with I 50 (concentration required for 50% growth suppression) values ranging from 0.098 to 0.450 mM for 3-hydroxy-α-ionone and 0.029 to 0.420 mM for 5-hydroxy-3,4-dimethyl-5-pentylfuran-2(5H)-one. Thus, the extracts and identified compounds may have the possibility to be utilized as bioagents for weed control.

Keywords: leaf extracts; growth inhibition; 3-hydroxy-α-ionone; 5-hydroxy-3,4-dimethyl-5-pentylfuran-2(5H)-one (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
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