Multiomics Reveals Mechanisms of Alternaria oxytropis Inhibiting Pathogenic Fungi in Oxytropis ochrocephala

Endophytic fungi can benefit the host plant and increase the plant resistance. Now, there is no in-depth study of how Alternaria oxytropis (A. oxytropis) is enhancing the ability of inhibiting pathogenic fungi in Oxytropis ochrocephala (O. ochrocephala). In this study, the fungal community and metab...

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Bibliographic Details
Published in:Journal of agricultural and food chemistry 2024-01, Vol.72 (4), p.2397-2409
Main Authors: Fu, Keyi, Schardl, Christopher L., Cook, Daniel, Cao, Xuanli, ling, Ning, He, Chunyu, Wu, Dandan, Xue, Longhai, Li, Yanzhong, Shi, Zunji
Format: Article
Language:English
Subjects:
Alternaria
biomarkers
Colletotrichum
endophytes
food chemistry
fungal communities
fungi
host plants
Leptosphaeria
metabolites
multiomics
Omics Technologies Applied to Agriculture and Food
oxidative stress
Oxytropis
swainsonine
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Summary:Endophytic fungi can benefit the host plant and increase the plant resistance. Now, there is no in-depth study of how Alternaria oxytropis (A. oxytropis) is enhancing the ability of inhibiting pathogenic fungi in Oxytropis ochrocephala (O. ochrocephala). In this study, the fungal community and metabolites associated with endophyte-infected (EI) and endophyte-free (EF) O. ochrocephala were compared by multiomics. The fungal community indicated that there was more A. oxytropis, less phylum Ascomycota, and less genera Leptosphaeria, Colletotrichum, and Comoclathris in the EI group. As metabolic biomarkers, the levels of swainsonine and apigenin-7-O-glucoside-4-O-rutinoside were significantly increased in the EI group. Through in vitro validation experiments, swainsonine and apigenin-7-O-glucoside-4-O-rutinoside can dramatically suppress the growth of pathogenic fungi Leptosphaeria sclerotioides and Colletotrichum americae-borealis by increasing the level of oxidative stress. This work suggested that O. ochrocephala containing A. oxytropis could increase the resistance to fungal diseases by markedly enhancing the content of metabolites inhibiting pathogenic fungi.
ISSN:0021-8561
1520-5118
DOI:10.1021/acs.jafc.3c09049