Study of the allelopathic activity of Garcinia pedunculata Roxb

Rob, Md. Mahfuzur; Noguchi, Hitoshi

doi:10.21475/poj.12.01.19.pt1773

Cited by 10 publications

(7 citation statements)

References 25 publications

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“…The phytotoxic activity increased with increasing extract concentration and varied among the target species. Our findings corroborate studies by other researchers [31][32][33], who showed the concentration-and test species-dependent growth-inhibitory effects of different plant extracts. These results indicated that the growth-inhibitory effect might be due to allelopathic substances within the plant extracts.…”

Section: Discussionsupporting

confidence: 93%

Phytotoxic Activity and Identification of Phytotoxic Substances from Schumannianthus dichotomus

Rob

Hossen

Iwasaki

et al. 2020

Plants

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The phytotoxic potential of plants and their constituents against other plants is being increasingly investigated as a possible alternative to synthetic herbicides to control weeds in crop fields. In this study, we explored the phytotoxicity and phytotoxic substances of Schumannianthus dichotomus, a perennial wetland shrub native to Bangladesh, India, and Myanmar. Leaf extracts of S. dichotomus exerted strong phytotoxicity against two dicot species, alfalfa and cress, and two monocot species, barnyard grass and Italian ryegrass. A bioassay-driven purification process yielded two phenolic derivatives, syringic acid and methyl syringate. Both constituents significantly inhibited the growth of cress and Italian ryegrass in a concentration-dependent manner. The concentrations required for 50% growth inhibition (I50 value) of the shoot and root growth of cress were 75.8 and 61.3 μM, respectively, for syringic acid, compared with 43.2 and 31.5 μM, respectively, for methyl syringate. Similarly, to suppress the shoot and root growth of Italian rye grass, a greater amount of syringic acid (I50 = 213.7 and 175.9 μM) was needed than methyl syringate (I50 = 140.4 to 130.8 μM). Methyl syringate showed higher phytotoxic potential than syringic acid, and cress showed higher sensitivity to both substances. This study is the first to report on the phytotoxic potential of S. dichotomus and to identify phytotoxic substances from this plant material.

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Section: Discussionsupporting

confidence: 93%

Phytotoxic Activity and Identification of Phytotoxic Substances from Schumannianthus dichotomus

Rob

Hossen

Iwasaki

et al. 2020

Plants

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“…On the other hand, J. adhatoda also had a rather good negative association extract concentration of shoot and root growth and the Pearson correlation coefficient in the net house environment ranged from −0.943 to −0.991 (p<0.01) (Supplementary Table 1 & 2). Our findings were confirmed by the similar findings described by the researchers (19).…”

Section: Effect Of the Aqueous Methanol And Aqueous Extracts Obtained From Leaves Of J Adhatoda On The Shoot And Root Length (Cm)supporting

confidence: 93%

“…Shoot and root lengths were found to decrease with increasing treatment concentration in all test species. The inhibitory effect of the extracts on test plants may be a range of mechanisms such as lower mitotic activity in growing parts of the plant, lower ion absorption rate, inhibition of photosynthetic respiration and malfunctions of enzyme activity (18,19). The root lengths of 2.58, 2.45, 2.42, 2.31 and 2.22 cm were found in cauliflower, broccoli, tomato, foxtail millet and barnyard grass respectively whereas, root lengths of 1.81, 1.72, 1.70, 0.39 and 0.37cm were observed with 0.1 gm DW e extract mL-1in the laboratory condition (Supplementary Fig.…”

Section: Effect Of the Aqueous Methanol And Aqueous Extracts Obtained From Leaves Of J Adhatoda On The Shoot And Root Length (Cm)mentioning

confidence: 99%

Potencies of Justicia adhatoda L. for its possible phytotoxic activity

et al. 2021

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The phytotoxic effects of Justicia adhatoda L. were investigated on cauliflower, broccoli, tomato, foxtail millet and barnyard grass. The experiments were carried out under laboratory and in pot experiments. Six different aqueous methanol extract concentrations (control, 0.001, 0.003, 0.01, 0.03 and 0.1 g DW equivalent mL-1 extract) were tested in the laboratory and six aqueous extract concentrations (control, 1.0, 2.0, 3.0, 4.0 and 5.0 g DW mL-1 extract equivalent) were evaluated in the pot experiment. Results showed a reduction in germination and growth (shoot length, root length and biomass weight) at higher extract concentration compared to control. The leaf extracts from J. adhatoda showed that the foxtail millet and barnyard grass are germinating below 50 % both in the laboratory condition and in the pot experiment at their maximum concentration. When maximum extracts have been applied, we have found less than 0.5 cm of shoot and root of foxtail millet and barnyard grass. Maximum dry weight reduction was observed in foxtail millet and barnyard grass at the same concentration. The findings show that J. adhatoda may have phytotoxic potential and thus contains phytotoxins. Therefore, J. adhatoda can be used in sustainable crop production as a mulch or soil additive to suppress weeds.

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“…In addition, the results indicate that seedling length varied among the model plants, and the level of inhibition depended on the extract concentration (Figure 1). Similarly, several previous studies have also reported that the phytotoxic effect is concentration-dependent [48][49][50][51][52][53]. Moreover, many previous studies noted that test plant speciesʹ response varied depending on the types of phytotoxic substances [54].…”

Section: Biological Activity Of the Aqueous Methanol Extracts Of A Xylocarpa Leavesmentioning

confidence: 82%

Isolation and Identification of Two Potent Phytotoxic Substances from Afzelia xylocarpa for Controlling Weeds

et al. 2021

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Phytotoxic substances released from plants are considered eco-friendly alternatives for controlling weeds in agricultural production. In this study, the leaves of Afzelia xylocarpa (Kurz) Craib. were investigated for biological activity, and their active substances were determined. Extracts of A. xylocarpa leaf exhibited concentration-dependent phytotoxic activity against the seedling length of Lepidium sativum L., Medicago sativa L., Phleum pratense L., and Echinochloa crus-galli (L.) P. Beauv. Bioassay-guided fractionation of the A. xylocarpa leaf extracts led to isolating and identifying two compounds: vanillic acid and trans-ferulic acid. Both compounds were applied to four model plants using different concentrations. The results showed both compounds significantly inhibited the model plants’ seedling length in a species-dependent manner (p < 0.05). The phytotoxic effects of trans-ferulic acid (IC50 = 0.42 to 2.43 mM) on the model plants were much greater than that of vanillic acid (IC50 = 0.73 to 3.17 mM) and P. pratense was the most sensitive to both compounds. In addition, the application of an equimolar (0.3 mM) mixture of vanillic acid and trans-ferulic acid showed the synergistic effects of the phytotoxic activity against the root length of P. pratense and L. sativum. These results suggest that the leaves of A. xylocarpa and its phytotoxic compounds could be used as a natural source of herbicides.

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Study of the allelopathic activity of Garcinia pedunculata Roxb

Cited by 10 publications

References 25 publications

Phytotoxic Activity and Identification of Phytotoxic Substances from Schumannianthus dichotomus

Phytotoxic Activity and Identification of Phytotoxic Substances from Schumannianthus dichotomus

Potencies of Justicia adhatoda L. for its possible phytotoxic activity

Isolation and Identification of Two Potent Phytotoxic Substances from Afzelia xylocarpa for Controlling Weeds

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