Preliminary phytochemical determination and phytotoxic effects of Mimosa pudica L. leaf crude extract
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Abstract
A number of weeds can produce bioactive compounds that could be used as bioherbicides. This study was aimed to determine the phytochemical profile and investigate the phytotoxic activity of Mimosa pudica leaf crude extract. M. pudica leaves were extracted with 80% methanol solution at four concentrations: 0, 25, 50 and 100 g DW/L. Phytochemical screening showed the presence of tannin, flavonoid, alkaloid, terpenoid, phlobatannin and saponin. The phenolic compound and flavonoid contents were in the range of 186.12 ± 17.76 - 618.44 ± 43.01 mg GAE/mL and 133.69 ± 6.63 - 470.60 ± 26.91 mg QE/mL, respectively. A study on the leaf extract’s phytotoxic activity showed that the extract could significantly inhibit seed germination, root length and shoot length in lettuce, mustard green and rice. Increasing the extract concentration tended to increase the inhibition rate. The extract could inhibit seed germination and growth in lettuce and mustard green more effectively than in rice. The results indicate that M. pudica leaf extract may be a source of bioactive compounds which have phytotoxic effects on plant growth.
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