Stomatal conductance was found to change from steady-state to a slate of oscillations during daytime when vapour pressure deficit (VPD) increased to a value of 1 kPa in Glycyrrhiza inflata Batalin grown under the cond...Stomatal conductance was found to change from steady-state to a slate of oscillations during daytime when vapour pressure deficit (VPD) increased to a value of 1 kPa in Glycyrrhiza inflata Batalin grown under the conditions of arid desert in north-west China. The injected metabolic inhibitors (NaN3 or carbonyl cyanide-m-chlorophenyl-hydrazone (CCCP)) slightly reduced the stomatal conductance but did not significantly decrease the intensity of stomatal oscillations (amplitude/average). The oscillation intensity was found to he significantly correlated with VPD and root resistance, but not with the respiration rate. There might exist a minimum threshold of VPD (0.8 kPa) and root resistance (1/4 relative value) that induced stomatal oscillations. These results suggested that stomatal oscillations induced by atmospheric drought stress and root resistance were mainly a type of hydropassive movement.展开更多
Continuing the previous report(1),seventeen compounds were isolated from the roots and rhizoma of Glycyrrhiza inflata Bat. On the basis of spectroscopic methods five of them were identified as sucrose(1),4’,5,7-trihy...Continuing the previous report(1),seventeen compounds were isolated from the roots and rhizoma of Glycyrrhiza inflata Bat. On the basis of spectroscopic methods five of them were identified as sucrose(1),4’,5,7-trihydroxy-8-prenyl-flavonc(2),liquiritigenin(3),formononetin(4),and glabrone(5)(1),(4)and(5)were obtained from this plant for the first time. Their antioxidant activities were observed in three oxidizing systems in vitro.(2),(3)and(5)showed remarkable activities in scavenging(5 exhibited good activity in inhibiting hemolysis induced by H_2O_2(3)and(5)displayed higher inhibitory action on (HpD + hv)-induced hemolysis than som typical antioxidants.展开更多
Seven triterpenoid saponins were isolated from the 10% EtOH extract of the root of Glycyrrhiza inflata Bat. On the basis of chemical and spectroscopic methods,two of them were identified as glycyrrhetic acid-3-O-β-...Seven triterpenoid saponins were isolated from the 10% EtOH extract of the root of Glycyrrhiza inflata Bat. On the basis of chemical and spectroscopic methods,two of them were identified as glycyrrhetic acid-3-O-β-D-6”-ethyl-glucuronopyranosyl-(1→2)-β-D-6’-n-butyl-glucuro-nopyranoside(1),and glycyrrhetic acid-3-O-β-D-6”-n-butyl-glucuronopyranosyl-(1→2)-β-D-6’-n-ethyl-glucuronopyranoside(2). Both are new compounds and named inflasaponins Ⅱ and Ⅵ respec-tively.展开更多
文摘Stomatal conductance was found to change from steady-state to a slate of oscillations during daytime when vapour pressure deficit (VPD) increased to a value of 1 kPa in Glycyrrhiza inflata Batalin grown under the conditions of arid desert in north-west China. The injected metabolic inhibitors (NaN3 or carbonyl cyanide-m-chlorophenyl-hydrazone (CCCP)) slightly reduced the stomatal conductance but did not significantly decrease the intensity of stomatal oscillations (amplitude/average). The oscillation intensity was found to he significantly correlated with VPD and root resistance, but not with the respiration rate. There might exist a minimum threshold of VPD (0.8 kPa) and root resistance (1/4 relative value) that induced stomatal oscillations. These results suggested that stomatal oscillations induced by atmospheric drought stress and root resistance were mainly a type of hydropassive movement.
文摘Continuing the previous report(1),seventeen compounds were isolated from the roots and rhizoma of Glycyrrhiza inflata Bat. On the basis of spectroscopic methods five of them were identified as sucrose(1),4’,5,7-trihydroxy-8-prenyl-flavonc(2),liquiritigenin(3),formononetin(4),and glabrone(5)(1),(4)and(5)were obtained from this plant for the first time. Their antioxidant activities were observed in three oxidizing systems in vitro.(2),(3)and(5)showed remarkable activities in scavenging(5 exhibited good activity in inhibiting hemolysis induced by H_2O_2(3)and(5)displayed higher inhibitory action on (HpD + hv)-induced hemolysis than som typical antioxidants.
文摘Seven triterpenoid saponins were isolated from the 10% EtOH extract of the root of Glycyrrhiza inflata Bat. On the basis of chemical and spectroscopic methods,two of them were identified as glycyrrhetic acid-3-O-β-D-6”-ethyl-glucuronopyranosyl-(1→2)-β-D-6’-n-butyl-glucuro-nopyranoside(1),and glycyrrhetic acid-3-O-β-D-6”-n-butyl-glucuronopyranosyl-(1→2)-β-D-6’-n-ethyl-glucuronopyranoside(2). Both are new compounds and named inflasaponins Ⅱ and Ⅵ respec-tively.
