| Texto completo | |
| Autor(es): |
Marins Ocampos, Fernanda Maria
[1]
;
Borim de Souza, Ana Julia
[2]
;
Antar, Guilherme Medeiros
[3]
;
Wouters, Felipe Christoff
[4]
;
Colnago, Luiz Alberto
[1]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Embrapa Instrumentacao, BR-13560970 Sao Carlos, SP - Brazil
[2] Univ Estadual Paulista Julio de Mesquita Filho UN, Fac Ciencias, BR-17033360 Bauru, SP - Brazil
[3] Univ Sao Paulo, Inst Biociencias, Dept Bot, BR-05508090 Sao Paulo, SP - Brazil
[4] Univ Fed Sao Carlos UFSCar, Dept Quim, BR-13565905 Sao Carlos, SP - Brazil
Número total de Afiliações: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Molecules; v. 26, n. 14 JUL 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
Phenylphenalenones, metabolites found in Schiekia timida (Haemodoraceae), are a class of specialized metabolites with many biological activities, being phytoalexins in banana plants. In the constant search to solve the problem of glyphosate and to avoid resistance to commercial herbicides, this work aimed to investigate the phytotoxic effect of the methanolic extract of S. timida seeds. The chemical composition of the seed extract was directly investigated by NMR and UPLC-QToF MS and the pre- and post-emergence phytotoxic effect on a eudicotyledonous model (Lactuca sativa) and a monocotyledonous model (Allium cepa) was evaluated through germination and seedling growth tests. Three concentrations of the extract (0.25, 0.50, and 1.00 mg/mL) were prepared, and four replicates for each of them were analyzed. Three major phenylphenalenones were identified by NMR spectroscopy: 4-hydroxy-anigorufone, methoxyanigorufone, and anigorufone, two of those reported for the first time in S. timida. The presence of seven other phenylphenalenones was suggested by the LC-MS analyses. The phenylphenalenone mixture did not affect the germination rate, but impaired radicle and hypocotyl growth on both models. The effect in the monocotyledonous model was statistically similar to glyphosate in the lowest concentration (0.25 mg/mL). Therefore, although more research on this topic is required to probe this first report, this investigation suggests for the first time that phenylphenalenone compounds may be post-emergence herbicides. (AU) | |
| Processo FAPESP: | 14/50918-7 - INCT 2014: para o Controle Biorracional de Insetos Pragas e Fitopatógenos |
| Beneficiário: | Maria Fátima das Graças Fernandes da Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 12/25299-6 - Estudos integrados para o controle de formigas cortadeiras |
| Beneficiário: | João Batista Fernandes |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 19/13656-8 - Desenvolvimento e aplicações da ressonância magnética nuclear em produtos e processos de interesse agropecuário |
| Beneficiário: | Luiz Alberto Colnago |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 18/00504-2 - Investigação metabolômica por RMN de potenciais agroquímicos naturais de Schiekia orinocensis produzidos sob stress biótico e abiótico |
| Beneficiário: | Fernanda Maria Marins Ocampos |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |