RESUMO
Free and bound-form phenolics were isolated from potato (cv. Toyoshiro) flesh and peel. The free and bound-form phenolics in the peel showed high DPPH radical scavenging activity, while those in the flesh showed low activity. The total amount of chlorogenic acid and caffeic acid in the free-form phenolics from the peel was highly correlated with the DPPH radical scavenging activity. Ferulic acid was identified as the active radical scavenging compound in the bound-form phenolics from the peel. The potato peel may therefore offer an effective source of an antioxidative.
Assuntos
Antioxidantes/química , Antioxidantes/farmacologia , Fenóis/química , Fenóis/farmacologia , Solanum tuberosum/química , Antioxidantes/isolamento & purificação , Compostos de Bifenilo , Cromatografia Líquida de Alta Pressão , Radicais Livres/química , Fenóis/isolamento & purificação , Picratos/químicaRESUMO
The sugi (Cryptomeria japonica) pollinosis becomes representative allergic disease in early spring in Japan. However, effective treatment for the sugi pollinosis and countermeasure against pollen of C. japonica at its source have not been developed in a practical sense. In this paper, the research aiming to prevent dispersion of pollen of the C. japonica is introduced on application and practical application to the field from the laboratory using the growth regulation of the plant. We found that formation of male flower bud in C. japonica could be suppressed by TNE, since the 3 beta-hydroxylase is inhibited by the action of Trinexysapacethyl, TNE.
Assuntos
Cryptomeria/efeitos dos fármacos , Ciclopropanos/farmacologia , Flores/efeitos dos fármacos , Giberelinas/antagonistas & inibidores , Reguladores de Crescimento de Plantas/antagonistas & inibidores , Pólen , Quinonas/farmacologia , Alérgenos , Cryptomeria/crescimento & desenvolvimento , Cryptomeria/metabolismo , Relação Dose-Resposta a Droga , Flores/crescimento & desenvolvimento , Flores/metabolismo , Giberelinas/biossíntese , Giberelinas/metabolismo , Reguladores de Crescimento de Plantas/biossíntese , Reguladores de Crescimento de Plantas/metabolismo , Rinite Alérgica Perene/prevenção & controle , Estações do AnoRESUMO
A comparison of the plant growth retardant activity of the chlamydocin analogues, compound 1, six derivatives from 1 and 2, and two synthetic analogues revealed that there are two types of retardant in chlamydocin analogues. One, for example in compound 1, requires an oxygen atom at C-8 of the 2-aminodecanoic acid moiety to show retardant activity. The other, for example in compound 8, requires no oxygen atom at C-8 but requires a specific alkyl group chain length for activity. To determine the differences in mode of action of both types of retardant, rice seedlings were separately treated with compounds 1 and 8, and after appearance of dwarfism, their endogenous ABA and GA(1) levels were determined and compared to those of the control. Treatment with 1 (10 nmol/plant) increased ABA levels 4 times higher than that of the control and decreased GA(1) levels to 20% of that of the control. Treatment with 8 (30 nmol/plant) did not affect the ABA level but decreased GA(1) content to 5% of that of the control.
