RESUMO
In atrazine-tolerant tobacco cells with Ser to Thr mutation at the 264th amino acid of PsbA polypeptide in photosystem II (PSII), electron trannsport around the secondary quinone acceptor (Q(B)) site was inhibited to a greater extent by barbatic acid than in wild-type cells. Further characterization suggests similar mode of action of barbatic acid and phenyl-type herbicides.
Assuntos
Atrazina/farmacologia , Líquens/química , Nicotiana/efeitos dos fármacos , Nicotiana/enzimologia , Complexo de Proteína do Fotossistema II/antagonistas & inibidores , Complexo de Proteína do Fotossistema II/metabolismo , Ácidos Ftálicos/farmacologia , 2,4-Dinitrofenol/análogos & derivados , 2,4-Dinitrofenol/química , 2,4-Dinitrofenol/farmacologia , Linhagem Celular , Depsídeos , Resistência a Medicamentos , Hidroxibenzoatos/química , Hidroxibenzoatos/farmacologia , Estrutura Molecular , Ácidos Ftálicos/químicaRESUMO
Two isofuranonaphthoquinone derivatives, named arthoniafurones A (1-acetyl-8-hydroxynaphtho[2,3-c]furan-4,9-dione) and B [1-acetyl-4,8-dihydroxynaphtho[2,3-c]furan-9(4H)-one], were isolated from a spore-derived culture of the mycobiont of the lichen Arthonia cinnabarina, that is new to Japan. Bostrycoidin and 8-O-methylbostrycoidin were also identified in the A. cinnabarina culture.
