Far‐red light increases maize volatile emissions in response to volatile cues from neighbouring plants

• DOI: 10.1111/pce.14995
• Publication Date: 2024-06-14T07:55:37Z
• Authors: Rocío Escobar‐Bravo; Bernardus C. J. S...; Yaqin Zhang; Lei Wang; Christelle A. M. ...; Gaétan Glauser; Carlos L. Ballaré; Matthias Erb
• Keywords: 0301 basic medicine; 2. Zero hunger; 0106 biological sciences; 03 medical and health sciences; 15. Life on land; 01 natural sciences

Abstract Plants perceive the presence and defence status of their neighbours through light volatile cues, but how plants integrate both stimuli is poorly understood. We investigated if low Red to Far red (R:FR) ratios, indicative shading or canopy closure, affect maize ( Zea mays ) responses herbivore‐induced plant volatiles (HIPVs), including green leaf Z )−3‐hexenyl acetate. modulated signalling perception by using FR supplementation a phyB1phyB2 mutant, we determined release as response readout. To gain mechanistic insights, examined expression biosynthesis genes, hormone accumulation, photosynthesis. Exposure full blend HIPVs acetate induced release. Short‐term increased this response. In contrast, prolonged constitutive phytochrome B inactivation in showed opposite enhanced photosynthesis stomatal conductance acetate‐induced JA‐Ile levels. conclude that FR‐enriched environment can prompt respond more strongly emitted neighbours, which might be explained changes photosynthetic processes signalling. Our findings reveal interactive cues with potentially important consequences for plant‐plant plant‐herbivore interactions.