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Histamine: A key compound in red light-enhanced Fusarium verticillioides resistance in maize
Xuanjun Feng1,2, Dan Zheng2, Weixiao Zhang2
1State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China Sichuan Agricultural University Wenjiang China.
Abstract:
In this study, we demonstrate that red light is the most critical light component for promoting healthy maize growth during Fusarium verticillioides infection. Red light receptors PHYTOCHROME B (PHYB) and C (PHYC) play essential roles in maize defense against this pathogen. Overexpression of PHYC in maize enhances resistance to F. verticillioides. Additionally, we identified two defense-related gene networks and some metabolites that reliant on PHYCs, involving key contributors such as WRKY transcription factors and metabolites like histamine and thiamine. Notably, the application of 50 μM histamine significantly boosts resistance, particularly under high-density conditions, marking the first report of the role of histamine in disease resistance in plants.
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