6 结果
We report that an endophytic filamentous fungus species of the genus Diaporthe isolated from Cinchona ledgeriana (Rubiaceae) produces Cinchona alkaloids (quinine, quinidine, cinchonidine, and cinchonine) upon cultivation in a synthetic liquid medium. This study provides evidence that Cinchona
Transformed root cultures of CINCHONA LEDGERIANA have been generated by infecting shoots cultured IN VITRO with AGROBACTERIUM RHIZOGENES LBA9402. These root cultures grow axenically in the absence of antibiotics or exogenous plant growth regulators in media containing Gamborg B5 salts at half or
Considerable inter- and intraspecific variation with respect to the quantity and composition of plant natural products exists. The processes that drive this variation remain largely unknown. Understanding which factors determine chemical diversity has the potential to shed light on plant defenses
The toxicity of Cinchona alkaloids to cell cultures of C. ledgeriana has been studied in relation to alkaloid uptake and possibilities for selecting high-yielding cell lines. The most toxic, quinine, was completely toxic at 5.5 mM. Both quinine and quinidine were more toxic than their unmethoxylated
We report that the endophytic filamentous fungus Diaporthe sp., isolated from Cinchona ledgeriana and cultivated in a synthetic liquid medium, produces Cinchona alkaloids (quinine, quinidine, cinchonidine, and cinchonine). This shows that Cinchona alkaloids are produced not only in Cinchona plant
The alkaloid contents of the serially propagated CINCHONA LEDGERIANA leaf-shoot organ cultures that were fed with various precursors, were compared to the control cultures that were grown in Murashige and Skoog's medium supplemented with 5 mg/l benzyladenine. the average total alkaloid content of