Abstract
Benzoxazinoids are specialized metabolites that modulate plant physiology and plant interactions with their environment. In this review, we synthesize their multiple functions and ecological relevance. We first provide an overview of benzoxazinoid biosynthesis and highlight known regulatory elements involved in modulating their production. We then outline the role of benzoxazinoids in plant nutrition, vegetative and reproductive growth, and defense. We further summarize benzoxazinoid response to environmental factors such as temperature, drought, CO2, light, or nutrient levels and emphasize their potential role in tolerating abiotic stresses. Finally, we argue that benzoxazinoids act as a strong selective force on different trophic levels by shaping the plant interactions with microbes, insect herbivores, and competitor plants. Understanding the pivotal role of benzoxazinoids in plant biology is crucial to apprehend their impact on (agro)ecosystem functioning and diversity.
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