Chalcones as promising pesticidal agents against diamondback moth (Plutella xylostella): microwave-assisted synthesis and structure–activity relationship

Kumar, Rakesh; Sharma, Prince; Shard, Amit; Tewary, Dhananjay Kumar; Nadda, Gireesh; Sinha, Arun K.

doi:10.1007/s00044-011-9602-8

Cited by 23 publications

(17 citation statements)

References 31 publications

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“…38 Desta mesma forma, foram demonstrados eventuais novas aplicações de chalconas na proteção de cultivos e pesticidas orgânicos e para controle de plantas daninhas. 39 Em vista disto, foram ultilizados estudos de análise quantitativa da relação estrutura-atividade em uma série de chalconas e esses mostraram que grupos substituintes retiradores de elétrons, no anel cetônico, geram bons agentes pesticidas 40 . A Figura 4 apresenta estruturas de chalconas e análogos de chalconas.…”

Section: Inovação Na Perceptiva Ambientalunclassified

Materiais Cristalinos Funcionais e Desenvolvimento Tecnológico

et al. 2017

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O estudo de novos materiais e o conhecimento estrutural da matéria é de grande importância para a ciência, neste trabalho é feita uma relação entre o estudo molecular, via difração de Raios X, através do método cristalográfico e o desenvolvimento tecnológico. É apresentado uma descrição dessa metodologia, amplamente aplicada para determinação estrutural de materiais sólido cristalinos. Assim, são demonstrados alguns exemplos de novos materiais resultantes do estudo da biodiversidade molecular.

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Section: Inovação Na Perceptiva Ambientalunclassified

Materiais Cristalinos Funcionais e Desenvolvimento Tecnológico

et al. 2017

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“…The effectiveness of chalcones is enhanced by the presence of electron-withdrawing substituents in ring A and electron-withdrawing or electron-releasing substituents in ring B. A group of synthetic chalcones has been found to be insecticidal against Plutella xylostella, which is considered one of the most destructive pests of crucifers worldwide (Kumar et al, 2012). The naturally-occurring chalcones lonchocarpin, derricin, derricidin and isocordoin, isolated from Lonchocarpus neuroscapha, showed deterrent activity against larvae of Spodoptera littoralis and S. exempta (Simmonds et al, 1990), which are pests able to destroy crops rapidly.…”

Section: Nematicides Insect Deterrents and Antifeedantsmentioning

confidence: 99%

Biological Activities and Novel Applications of Chalcones

et al. 2016

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-This review provides information on the biological activities of chalcones (whether natural or synthetic derivatives) on different organisms, as well as an overview of the functions and possible new applications of these plant secondary metabolites on crop protection, as eco-friendly pesticides and weed control agents. Naturally occurring chalcones have been used in traditional medicine for many years; however, recent scientific advances have shown that these molecules have a broad range of biological activities in a variety of organisms. A review on the major sources of chalcones and the main molecular events involved in the modes of action of these natural products is achieved. Chalcones are molecules with a broad spectrum of biological activities, which are of great interest in agriculture to control weeds and unwanted pests.Keywords: mode of action, secondary metabolites, crop protection, pesticide, fungicide, antiviral, phytotoxicity. RESUMO -Esta avaliação fornece informações sobre as atividades biológicas de chalconas (quer derivados naturais ou sintéticos) em diferentes organismos, bem como uma visão geral das funções e eventuais novas aplicações desses metabólitos secundários de plantas em proteção de cultivos e pesticidas orgânicos e para controlar as plantas daninhas. Durante muitos anos têm sido utilizadas na medicina tradicional chalconas de ocorrência natural; no entanto, os recentes avanços científicos têm mostrado que essas moléculas têm vasta gama de atividades biológicas em uma variedade de organismos. Este estudo permite ter uma ideia das principais fontes de chalconas e dos eventos moleculares envolvidos nos principais mecanismos de ação desses produtos naturais. As chalconas são moléculas com um largo espectro de atividade biológica, de grande interesse na agricultura para controlar plantas daninhas e pragas indesejadas.Palavras-chave: modo de ação, metabólitos secundários, proteção de cultivos, pesticida, fungicida, antiviral, fitotoxicidade.

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“…Chalcones, members of the flavonoid class of secondary metabolites, are composed of two aromatic ring moieties linked by an α,β‐unsaturated ketone, [23] and are obtained from the leaves, stems, roots and flowers of plants [24] . Additionally, chalcones can be readily synthetized through a wide array of methodologies, [25] providing easy access to a broad structural diversity, and thus affording a variety of biological activities, [26] as anti‐inflammatory, [27,28] antitumoral, [29] antiviral, [30] insecticide, [31,32] nematicide, [33] larvicide [34,35] and herbicide [36,37] . Due to their potent capacity to scavenge reactive oxygen species as well as the electrophilic nature of the α,β‐unsaturated ketone moiety, chalcones have also been used as antioxidant agents [38–40] .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Chalcone Derivatives as Photosynthesis and Plant Growth Inhibitors

Pádua

Souza

Sales

et al. 2021

Chemistry & Biodiversity

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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.

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Chalcones as promising pesticidal agents against diamondback moth (Plutella xylostella): microwave-assisted synthesis and structure–activity relationship

Cited by 23 publications

References 31 publications

Materiais Cristalinos Funcionais e Desenvolvimento Tecnológico

Materiais Cristalinos Funcionais e Desenvolvimento Tecnológico

Biological Activities and Novel Applications of Chalcones

Evaluation of Chalcone Derivatives as Photosynthesis and Plant Growth Inhibitors

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