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Loliolide, a Carotenoid Metabolite, Is a Potential Endogenous Inducer of Herbivore Resistance
- Source :
- SC30201907300008, NARO成果DBa, 出版社版PDFのためアーカイブ不可
- Publication Year :
- 2019
- Publisher :
- American Society of Plant Biologists (ASPB), 2019.
-
Abstract
- Jasmonic acid (JA) plays an important role in the induction of herbivore resistance in many plants. However, JA-independent herbivore resistance has been suggested. An herbivore-resistance-inducing substance was isolated from Tobacco mosaic virus-infected tobacco (Nicotiana tabacum) leaves in which a hypersensitive response (HR) was induced and identified as loliolide, which has been identified as a β-carotene metabolite. When applied to tomato (Solanum lycopersicum) leaves, loliolide decreased the survival rate of the two-spotted spider mite, Tetranychus urticae, egg deposition by the same pest, and the survival rate of larvae of the common cutworm Spodoptera litura without exhibiting toxicity against these herbivores. Endogenous loliolide levels increased not only with an infestation by S. litura larvae, but also with the exogenous application of their oral secretions in tomato. A microarray analysis identified cell-wall–associated defense genes as loliolide-responsive tomato genes, and exogenous JA application did not induce the expression of these genes. Suppressor of zeaxanthin-less (szl), an Arabidopsis (Arabidopsis thaliana) mutant with a point mutation in a key gene of the β-carotene metabolic pathway, exhibited the decreased accumulation of endogenous loliolide and increased susceptibility to infestation by the western flower thrip (Frankliniella occidentalis). A pretreatment with loliolide decreased susceptibility to thrips in the JA-insensitive Arabidopsis mutant coronatine-insensitive1. Exogenous loliolide did not restore reduced electrolyte leakage in szl in response to a HR-inducing bacterial strain. These results suggest that loliolide functions as an endogenous signal that mediates defense responses to herbivores, possibly independently of JA, at least in tomato and Arabidopsis plants.
- Subjects :
- 0106 biological sciences
Hypersensitive response
Physiology
Nicotiana tabacum
Arabidopsis
Spodoptera litura
Plant Science
Spodoptera
01 natural sciences
chemistry.chemical_compound
Solanum lycopersicum
Tobacco
Botany
Genetics
Tobacco mosaic virus
Animals
Arabidopsis thaliana
Herbivory
Benzofurans
Cell Death
biology
Jasmonic acid
fungi
food and beverages
Articles
biology.organism_classification
Carotenoids
Tobacco Mosaic Virus
chemistry
Solanum
Tetranychidae
010606 plant biology & botany
Subjects
Details
- Language :
- English
- ISSN :
- 15322548
- Volume :
- 179
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- Plant Physiology = Plant Physiology
- Accession number :
- edsair.doi.dedup.....daed625c325a072cd7311e651ec6a74e