000			03052nab a2200289 i 4500
003			BR-BrBNA
005			20230922110933.0
008			230807b2020 bl.ar|pooa||| 00| 0 eng |
040			_aBR-BrBNA _beng
072			_aH60
100			_aPerboni, L.T.
100			_aAgostinetto, D.
100			_aGazola, J.
100			_aTessaro, D.
100			_aTeixeira, M.M.
100			_aNeutzling, A.
245			_aHerbicidal activity of kidney leaf mud plantain leaves extracts on the germination of four species
500			_aPublicação on-line; 24 ref.; 10 tables; 4 illus.; Summary (En)
520			_a ABSTRACT Background: Plants synthesize compounds of specialized metabolism to defend themselves against biotic and abiotic stresses. These compounds could be used as models for pesticide development. Among the species that have not yet been studied for the potential to produce active compounds is the kidney leaf mud plantain (Heteranthera reniformis). Objective: The goal was to evaluate the effect of hexanic, ethyl acetate and methanolic extracts of H. reniformis leaves on cress (Lepidium sativum) seed germination to determine which one have the highest biological activity; and to evaluate different concentrations of extract with the highest biological activity on lettuce (Lactuca sativa), barnyard grass (Echinochloa sp.) and giant arrowhead (Sagittaria montevidensis) germination. Methods: The seeds were placed on petri dishes containing two sheets of germitest paper, and after the application of the extract, they were sealed and placed in growth chambers with controlled temperature and photoperiod. The variables analyzed were 1st and 2nd germination count, germination speed index and length of the aerial part and roots. Results: The ethyl acetate extract provided greater phytotoxicity on cress than the other extracts. In general, the highest concentration of ethyl acetate extract was the most efficient in reducing variables for all species. Conclusions: The ethyl acetate extract of H. reniformis presents inhibitory activity on the seeds of cress, lettuce, giant arrowhead and barnyard grass, but this activity was dependent on the concentration of the extract and the species studied. H. reniformis synthesizes compounds with phytotoxic activity and purification of extracts is required to isolate, identify and characterize the action mechanism of the compounds with herbicide activity, so that in the future these can be used as models for the development of herbicides. Keywords: Heteranthera reniformis extracts weeds suppression
650			_aPLANTA AQUÁTICA
650			_aEXTRATO
650			_aERVA DANINHA
773	0		_0886 _91817 _dLondrina-PR : Sociedade Brasileira da Ciência das Plantas Daninhas, 1978 _o2023-031024 _tPlanta Daninha (Brazil) _x0100-8358; 1806-9681 (on-line) _gv. 38 p. 1-10; (2020) _wBR2023000834
856			_uhttps://www.scielo.br/j/pd/a/BKd9kDdY46SHtqmSPgL3zbc/?format=pdf&lang=en
942			_cAnalítica
999			_c9746 _d9746