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Molecules

Title:		"alpha-Ionone, an Apocarotenoid, Induces Plant Resistance to Western Flower Thrips, Frankliniella occidentalis, Independently of Jasmonic Acid"
Author(s):		Murata M; Kobayashi T; Seo S;
Address:		"Institute of Vegetable and Floriculture Sciences, National Agriculture and Food Research Organization, Tsu, Mie 514-2392, Japan. Institute of Agrobiological Sciences, National Agriculture and Food Research Organization, Tsukuba, Ibaraki 305-8602, Japan"
Journal Title:		Molecules
Year:		2019
Volume:		20191219
Issue:		1
Page Number:		-
DOI:		10.3390/molecules25010017
ISSN/ISBN:		1420-3049 (Electronic) 1420-3049 (Linking)
Abstract:		"Apocarotenoids, such as beta-cyclocitral, alpha-ionone, beta-ionone, and loliolide, are derived from carotenes via chemical or enzymatic processes. Recent studies revealed that beta-cyclocitral and loliolide play an important role in various aspects of plant physiology, such as stress responses, plant growth, and herbivore resistance. However, information on the physiological role of alpha-ionone is limited. We herein investigated the effects of alpha-ionone on plant protection against herbivore attacks. The pretreatment of whole tomato (Solanum lycopersicum) plants with alpha-ionone vapor decreased the survival rate of western flower thrips (Frankliniella occidentalis) without exhibiting insecticidal activity. Exogenous alpha-ionone enhanced the expression of defense-related genes, such as basic beta-1,3-glucanase and basic chitinase genes, in tomato leaves, but not that of jasmonic acid (JA)- or loliolide-responsive genes. The pretreatment with alpha-ionone markedly decreased egg deposition by western flower thrips in the JA-insensitive Arabidopsis (Arabidopsis thaliana) mutant coi1-1. We also found that common cutworm (Spodoptera litura) larvae fed on alpha-ionone-treated tomato plants exhibited a reduction in weight. These results suggest that alpha-ionone induces plant resistance to western flower thrips through a different mode of action from that of JA and loliolide"
Keywords:		"Animals Arabidopsis/drug effects/genetics/parasitology Cyclopentanes/metabolism *Disease Resistance Female Flowers/drug effects/parasitology Gene Expression Regulation, Plant/drug effects Solanum lycopersicum/*drug effects/genetics/parasitology Norisopren;"
Notes:		"MedlineMurata, Mika Kobayashi, Tetsuya Seo, Shigemi eng Switzerland 2019/12/22 Molecules. 2019 Dec 19; 25(1):17. doi: 10.3390/molecules25010017"