Phytotoxic Effects of Senna garrettiana and Identification of Phytotoxic Substances for the Development of Bioherbicides

Ramida Krumsri, Arihiro Iwasaki, Kiyotake Suenaga and Hisashi Kato-Noguchi ()
Additional contact information
Ramida Krumsri: Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Miki 761-0795, Kagawa, Japan
Arihiro Iwasaki: Department of Chemistry, Faculty of Science and Technology, Keio University, Kohoku, Yokohama 223-8522, Kanagawa, Japan
Kiyotake Suenaga: Department of Chemistry, Faculty of Science and Technology, Keio University, Kohoku, Yokohama 223-8522, Kanagawa, Japan
Hisashi Kato-Noguchi: Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Miki 761-0795, Kagawa, Japan

Agriculture, 2022, vol. 12, issue 9, 1-12

Abstract: Phytotoxic substances in plants that may serve as alternative natural herbicides for controlling weeds are required for sustainable agriculture. We explored the phytotoxic activities of aqueous methanol extracts of Senna garrettiana (Craib) Irwin & Barneby leaves and the active substances they contain. The results revealed that the S. garrettiana leaf extracts had significant phytotoxic effects on three dicotyledons ( Lepidium sativum L., Lactuca sativa L., and Medicago sativa L.) and two monocotyledons ( Phleum pratense L. and Lolium multiflorum Lam.). An bioassay-guided isolation process yielded three active substances; caffeic acid, methyl caffeate, and ( S )-6-hydroxymellein inhibited the seed germination, seedling growth, and biomass accumulation of L. sativum in a concentration-dependent manner. Based on the concentration required for 50% growth inhibition (IC 50 ), ( S )-6-hydroxymellein had the highest inhibitory effects on L. sativum in all test parameters, followed by methyl caffeate and caffeic acid. The L. sativum roots were the most susceptible to ( S )-6-hydroxymellein (IC 50 = 383 µM) and caffeic acid (IC 50 = 2627 µM), whereas methyl caffeate (IC 50 = 1361 µM) had the greatest effect on the L. sativum shoots. Thus, three isolated compounds may explain the phytotoxic effects of the S. garrettiana extracts. Consequently, caffeic acid, methyl caffeate, and ( S )-6-hydroxymellein could be potential candidates for the future production of bioherbicides.

Keywords: biological activity; bioherbicide; growth inhibition; phytotoxic compounds (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
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/2077-0472/12/9/1338/pdf (application/pdf)
https://www.mdpi.com/2077-0472/12/9/1338/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jagris:v:12:y:2022:i:9:p:1338-:d:901435

Access Statistics for this article

Agriculture is currently edited by Ms. Leda Xuan

More articles in Agriculture from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().