Aspergillus flavus's Response to Antagonism Bacterial Stress Sheds Light on a Regulation and Metabolic Trade-Off Mechanism for Adversity Survival.

Huali Xie, Abdoulie Jallow, Xiaofeng Yue, Xiuping Wang, Jiayun Fu, Silvano E Mwakinyali, Qi Zhang, Peiwu Li

Journal of agricultural and food chemistry 2021 Apr 28

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Biocontrol to combat the menace of Aspergillus flavus has gained considerable attention. However, the molecular mechanisms of A. flavus 's response to antagonism biotic stress are poorly deciphered. Here, we discovered that A. flavus switches an adaptive metabolic reprogramming to ensure its adversity survival by multiomics analyses (including four omics platform). Antifungal "weapons" lipopeptides and antibacterial metabolites of imizoquin were identified. The central metabolism fluxes were significantly depleted but the expressions of most corresponding genes were considerably increased in A. flavus. Secondary metabolism that does not contribute to stress was markedly suppressed. In contrast, A. flavus antibacterial "weapon arsenal" was activated to occupy an ecological niche. Our results revealed that interlinked mitochondrial central metabolism and secondary metabolism are central to A. flavus antagonism biotic stress response. This discovery contributes to the targeted design of biocontrol agents and smart regularization of rhizosphere microbiome homeostasis to realize long-term fungi pathogen control and mitigation mycotoxin contamination.

Citation

Huali Xie, Abdoulie Jallow, Xiaofeng Yue, Xiuping Wang, Jiayun Fu, Silvano E Mwakinyali, Qi Zhang, Peiwu Li. Aspergillus flavus's Response to Antagonism Bacterial Stress Sheds Light on a Regulation and Metabolic Trade-Off Mechanism for Adversity Survival. Journal of agricultural and food chemistry. 2021 Apr 28;69(16):4840-4848