Allelopathic potential of
            <i>Oldenlandia corymbosa</i>
            and identification of its allelopathic substances

Kyaw, Ei Han; Hossen, Kawsar; Iwasaki, Arihiro; Suenaga, Kiyotake; Kato-Noguchi, Hisashi

doi:10.1080/11263504.2024.2313215

Cited by 1 publication

(1 citation statement)

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“…Recently, medicinal plants have gained attention because of their comparatively high allelopathic activity [22] and for the secondary metabolites or active components that they contain [23]. Many researchers have recently reported that the growth of test plant species, including weeds, was inhibited by the phytotoxic substances found in medicinal plants [24][25][26]. Kato-Noguchi (2023) [27] reported that many medicinal plants are highly allelopathic and have yielded over 100 allelochemicals, including novel compounds that exhibit different levels of biological activities and functions.…”

Section: Introductionmentioning

confidence: 99%

Allelopathic Activity of a Novel Compound and Two Known Sesquiterpene from Croton oblongifolius Roxb.

Moh,

Tojo,

Teruya

et al. 2024

Agronomy

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Plant extracts with allelopathic activity and their related compounds have been investigated for a long time as an eco-friendly approach to sustainable weed management. Croton oblongifolius (Roxb.) is a traditional medicinal plant valued for its diverse source of bioactive compounds that have been used to treat various diseases. C. oblongifolius leaf extract was previously described to involve a number of allelochemicals. Therefore, we conducted this research to explore more of the allelochemicals in the leaves of C. oblongifolius. The leaf extracts showed significant inhibitory activity against two test plants, Lolium multiflorum (monocot) and Medicago sativa (dicot). The bioassay-directed chromatographic purification of the leaf extracts yielded three compounds, including one novel compound, identified using spectral data, as follows: (1) alpinolide peroxide, (2) 6-hydroxy alpinolide, and (3) 3-hydroxy-5-isopropyl-3-methyl-2,3-dihydro-1H-inden-1-one (a novel sesquiterpene). These compounds considerably limited the growth of L. sativum. The compound concentrations affecting a 50% growth limitation (IC50) of L. sativum varied from 0.16 to 0.34 mM. Therefore, these characterized compounds may be allelopathic agents that cause the allelopathy of C. oblongifolius.

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