Evaluation of Chalcone Derivatives as Photosynthesis and Plant Growth Inhibitors.

Autor: Mara Silva de Pádua G; Chemistry Department, Federal University of Mato Grosso, Cuiabá-MT, Brazil., Maria De Souza J; Chemistry Department, Federal University of Mato Grosso, Cuiabá-MT, Brazil., Celia Moura Sales M; Chemistry Department, Federal University of Mato Grosso, Cuiabá-MT, Brazil., Gomes de Vasconcelos L; Chemistry Department, Federal University of Mato Grosso, Cuiabá-MT, Brazil., Luiz Dall'Oglio E; Chemistry Department, Federal University of Mato Grosso, Cuiabá-MT, Brazil., Faraggi TM; Product Metabolism Analytical Sciences, Syngenta Crop Protection, LLC, Greensboro, NC, USA., Moreira Sampaio O; Chemistry Department, Federal University of Mato Grosso, Cuiabá-MT, Brazil., Campos Curcino Vieira L; Engineering Faculty, Federal University of Mato Grosso, Várzea Grande-MT, Brazil.
Jazyk: angličtina
Zdroj: Chemistry & biodiversity [Chem Biodivers] 2021 Jul; Vol. 18 (7), pp. e2100226. Date of Electronic Publication: 2021 Jun 29.
DOI: 10.1002/cbdv.202100226
Abstrakt: We report the evaluation of chalcone derivatives as photosystem II (PSII) and plant growth inhibitors. Chalcone derivatives were evaluated as PSII inhibitors through Chl a fluorescence measurement. (E)-Chalcone (6a) and (E)-3-(4-bromophenyl)-1-(4-fluorophenyl)prop-2-en-1-one (6j) showed the best results, reducing the performance index on absorption basis parameter (PI abs ) by 70 %. Additionally, the decrease of TR 0 /RC and ET 0 /RC parameters indicates that the chalcone derivatives limited the number of active PSII reaction centers and the amount of trapped energy within them. Compounds 6a and 6j both act as post-emergent herbicides at 50 μM, reducing the root biomass of the Ipomoea grandifolia weed by 72 % and 83 %, respectively, corroborating the fluorescence results. The selectivity against weeds as compared to valuable crops by compounds 6a and 6j were evaluated employing Zea mays and Phaseolus vulgaris plants. In these, our newly synthesized compounds showed no effects on biomass accumulation of roots and aerial parts when compared to the control, providing valuable evidence for the role of these compounds as selective inhibitors of the growth of undesired weeds.
(© 2021 Wiley-VHCA AG, Zurich, Switzerland.)
Databáze: MEDLINE
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