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J Exp Bot

Title:		Molecular analysis of broad-spectrum induced resistance in rice by the green leaf volatile Z-3-hexenyl acetate
Author(s):		Desmedt W; Ameye M; Filipe O; De Waele E; Van Nieuwerburgh F; Deforce D; Van Meulebroek L; Vanhaecke L; Kyndt T; Hofte M; Audenaert K;
Address:		"Laboratory of Applied Mycology and Phenomics, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Valentin Vaerwyckweg 1, 9000 Ghent, Belgium. Inagro VZW, Ieperseweg 87, 8800 Roeselare, Belgium. Laboratory of Phytopathology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000 Ghent, Belgium. Laboratory of Pharmaceutical Biotechnology, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemse Steenweg 460, 9000 Ghent, Belgium. Laboratory of Integrative Metabolomics, Department of Translational Physiology, Infectiology and Public Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium. Epigenetics and Defence Research Group, Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Proeftuinstraat 86, 9000 Ghent, Belgium"
Journal Title:		J Exp Bot
Year:		2023
Volume:		20230825
Issue:
Page Number:		-
DOI:		10.1093/jxb/erad338
ISSN/ISBN:		1460-2431 (Electronic) 0022-0957 (Linking)
Abstract:		"Green leaf volatiles (GLVs), volatile organic compounds released by plants upon tissue damage, are key signaling molecules in plant immunity. The ability of exogenous GLV application to trigger an induced resistance (IR) phenotype against arthropod pests has been widely reported, but its effectiveness against plant pathogens is less well-understood. In this study, we combined mRNA sequencing-based transcriptomics and phytohormone measurements with multispectral imaging-based precision phenotyping to gain insights into the molecular basis of Z-3-hexenyl acetate induced resistance (Z-3-HAC-IR) in rice. Furthermore, we evaluated the efficacy of Z-3-HAC-IR against a panel of economically significant rice pathogens: Pyricularia oryzae, Rhizoctonia solani, Xanthomonas oryzae pv. oryzae, Cochliobolus miyabeanus and Meloidogyne graminicola. Our data revealed rapid induction of jasmonate metabolism and systemic induction of plant immune responses upon Z-3-HAC exposure, as well as a transient allocation cost due to accelerated chlorophyll degradation and nutrient remobilization. Z-3-HAC-IR proved effective against all tested pathogens except for C. miyabeanus, including against the (hemi)biotrophs M. graminicola, X. oryzae pv. oryzae and P. oryzae. The Z-3-HAC-IR phenotype was lost in the jasmonate-deficient hebiba mutant, which confirms the causal role of JA in Z-3-HAC-IR. Together, our results show that GLV exposure in rice induces broad-spectrum, JA-mediated disease resistance with limited allocation costs, and may thus be a promising alternative crop protection approach"
Keywords:		green leaf volatiles induced resistance jasmonic acid photosynthesis phytohormones priming rice transcriptomics;
Notes:		"PublisherDesmedt, Willem Ameye, Maarten Filipe, Osvaldo De Waele, Evelien Van Nieuwerburgh, Filip Deforce, Dieter Van Meulebroek, Lieven Vanhaecke, Lynn Kyndt, Tina Hofte, Monica Audenaert, Kris eng England 2023/08/25 J Exp Bot. 2023 Aug 25:erad338. doi: 10.1093/jxb/erad338"