Phytotoxic and Antifungal Metabolites from Curvularia crepinii QTYC-1 Isolated from the Gut of Pantala flavescens

Molecules

Xiao Xu¹  Feifei Sun¹  Mingwei Shao¹  Liping Jin¹  Caiping Yin²  Yinglao Zhang² 

[1] College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China;School of Life Sciences, Anhui Agricultural University, Hefei 230036, China;

关键词: Curvularia crepinii;    Pantala flavescens;    phytotoxic activity;    antifungal activity;    macrolide;    natural product;   

DOI  :  10.3390/molecules23040951

来源: DOAJ

【 摘 要 】

Four metabolites (1–4), including a new macrolide, O-demethylated-zeaenol (2), and three known compounds, zeaenol (1), adenosine (3), and ergosta-5,7,22-trien-3b-ol (4) were isolated and purified from Curvularia crepinii QTYC-1, a fungus residing in the gut of Pantala flavescens. The structures of isolated compounds were identified on the basis of extensive spectroscopic analysis and by comparison of the corresponding data with those reported in the literature previously. The new compound 2 showed good phytotoxic activity against Echinochloa crusgalli with an IC50 value of less than 5 µg/mL, which was comparable to that of positive 2,4-dichlorophenoxyacetic acid (2,4-D). Compound 1 exhibited moderate herbicidal activity against E. crusgalli with an IC50 value of 28.8 μg/mL. Furthermore, the new metabolite 2 was found to possess moderate antifungal activity against Valsa mali at the concentration of 100 µg/mL, with the inhibition rate of 50%. These results suggest that the new macrolide 2 and the known compound 1 have potential to be used as biocontrol agents in agriculture.

【 授权许可】

Unknown