Title : Induction of Antiphytopathogenic Metabolite and Squalene Production and Phytotoxin Elimination by Adjustment of the Mode of Fermentation in Cocultures of Phytopathogenic Nigrospora oryzae and Irpex lacteus - Wu_2019_J.Agric.Food.Chem_67_11877 |
Author(s) : Wu YM , Zhou QY , Yang XQ , Luo YJ , Qian JJ , Liu SX , Yang YB , Ding ZT |
Ref : Journal of Agricultural and Food Chemistry , 67 :11877 , 2019 |
Abstract :
The investigation of the metabolites from different cocultures of Nigrospora oryzae and Irpex lacteus in solid medium revealed two new squalenes (1 and 2); one new azaphilone (3); two new tremulane sesquiterpenes (4 and 5); and three known compounds, conocenol B (6), conocenol C (7), and 4-(4-dihydroxymethylphenoxy)benzaldehyde (8). The antagonistic relationship was examined by studying metabolite production. The production of compounds 6 and 8 by I. lacteus after the induction of coculture indicated significant selectivity for antifungal activity against phytopathogenic N. oryzae, with MICs of 16 mug/mL; compounds 6 and 8 also exhibited antifungal activities in vivo against Cerasus cerasoides infected by N. oryzae at concentrations of 100 mug/mL. New compounds 2 and 4 showed antifungal activities against Colletotrichum gloeosporioides, with MICs of 8 mug/mL, and compound 4 showed antifungal activity against Didymella glomerata with an MIC of 1 mug/mL. These results indicate that the mutually antagonistic relationship in the coculture of the phytopathogen and the endophyte can result in antibiotics that inhibit the phytopathogen and downregulate the production of phytotoxins by phytopathogenic N. oryzae. New compound 5 from I. lacteus showed weak activity against acetylcholinesterase (AChE), with an inhibition ratio of 16% at a concentration of 50 muM. |
PubMedSearch : Wu_2019_J.Agric.Food.Chem_67_11877 |
PubMedID: 31597038 |
Wu YM, Zhou QY, Yang XQ, Luo YJ, Qian JJ, Liu SX, Yang YB, Ding ZT (2019)
Induction of Antiphytopathogenic Metabolite and Squalene Production and Phytotoxin Elimination by Adjustment of the Mode of Fermentation in Cocultures of Phytopathogenic Nigrospora oryzae and Irpex lacteus
Journal of Agricultural and Food Chemistry
67 :11877
Wu YM, Zhou QY, Yang XQ, Luo YJ, Qian JJ, Liu SX, Yang YB, Ding ZT (2019)
Journal of Agricultural and Food Chemistry
67 :11877