Mythimna separata herbivory primes maize resistance in systemic leaves
| Autor: | Yuxing Xu, Jianqiang Wu, Jing Li, Jinfeng Qi, Lei Wang, Saif ul Malook |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Benzoxazinoids Physiology media_common.quotation_subject Plant Science Insect Priming (agriculture) Cyclopentanes Biology Moths maize 01 natural sciences Genetic analysis Zea mays Transcriptome 03 medical and health sciences chemistry.chemical_compound Mythimna separata Plant Growth Regulators Botany Bioassay Animals Herbivory Oxylipins priming media_common Abiotic component AcademicSubjects/SCI01210 Jasmonic acid jasmonic acid biology.organism_classification Research Papers Plant Leaves 030104 developmental biology chemistry insect resistance Plant–Environment Interactions transcriptome 010606 plant biology & botany |
| Zdroj: | Journal of Experimental Botany |
| ISSN: | 1460-2431 |
| Popis: | Biotic and abiotic cues can trigger priming in plants, which enables plants to respond to subsequent challenge with stronger and/or faster responses. It is well known that herbivory activates defense-related responses in systemic leaves. However, little is known about whether insect feeding activates priming in systemic leaves. To determine whether and how herbivory induces priming in maize systemic leaves, a combination of insect bioassays, phytohormone and defense metabolite quantification, and genetic and transcriptome analyses were performed. Actual and simulated Mythimna separata herbivory in maize local leaves primed the systemic leaves for enhanced accumulation of jasmonic acid and benzoxazinoids and increased resistance to M. separata. Activation of priming in maize systemic leaves depends on both the duration of simulated herbivory and perception of M. separata oral secretions in the local leaves, and genetic analysis indicated that jasmonic acid and benzoxazinoids mediate the primed defenses in systemic leaves. Consistently, in response to simulated herbivory, the primed systemic leaves exhibited a large number of genes that were uniquely regulated or showed further up- or down-regulation compared with the non-primed systemic leaves. This study provides new insight into the regulation and ecological function of priming in maize. Mythimna separata herbivory primes systemic leaves, and this priming-endowed resistance requires perception of insect oral secretions, the plant hormone jasmonic acid, and the defensive metabolites benzoxazinoids. |
| Databáze: | OpenAIRE |
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