Effects of Tinospora tuberculata leaf methanol extract on seedling growth of rice and associated weed species in hydroponic culture

摘要: The study was conducted to evaluate the responses of rice and weed seedlings (barnyardgrass weedy rice) at three-leaf stage Tinospora tuberculata leaf methanol extract (3.12, 6.25 12.5 g L−1) under hydroponic culture. It shows that had various degrees effects depending on target plant species each tested index (biomass, root length, shoot transpiration volume, chlorophyll a, b carotenoid contents). effective concentration capable reducing 50% growth higher than those species. Moreover, length more tolerant in comparison other parameters measured. A greater reduction observed a content compared carotenoid. results revealed volume closely coincided with magnitude inhibition plants. Ultra-fast liquid chromatography analysis 11 32 peaks chemical profile, including benzoic acid, caffeic chlorogenic isoorientin, isovitexin, orientin, p-anisic syringic trans-cinnamic trans-ferulic vitexin have same retention time extract. amount compounds present range between 4 817 115.5 mg kg−1 dry weight (DW). concentration-response bioassay all individual their equimolar mixture against seeds barnyardgrass contribution allelopahic activity T. examined combination exhibited inhibitory early barnyardgrass. Therefore, specific number, concentration, bioactive leads allelopathy leaves which could be employable directly as natural herbicide its inhibitor can used template for producing new herbicides.