Plant responses to insect eggs are not induced by egg‐associated microbes, but by a secretion attached to the eggs
| Autor: | Luis R. Paniagua Voirol, Monika Hilker, Nina E. Fatouros, Georgios Valsamakis, Arne Weinhold, Reinhard Kunze, Vivien Lortzing, Paul R. Johnston |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine plant defence Physiology media_common.quotation_subject Arabidopsis Brassica Plant Science Insect Biology 01 natural sciences Lepidoptera genitalia 03 medical and health sciences Exocrine Glands Gene Expression Regulation Plant Botany Animals Arabidopsis thaliana priming induction Ovum media_common Pieris brassicae Herbivore Larva herbivory fungi food and beverages biology.organism_classification Biosystematiek Anti-Bacterial Agents Elicitor Plant Leaves 030104 developmental biology Brassicaceae embryonic structures Biosystematics Female lepidoptera microbes Butterflies Mustard Plant 010606 plant biology & botany |
| Zdroj: | Plant, Cell & Environment, 43(8), 1815-1826 Plant, Cell & Environment 43 (2020) 8 |
| ISSN: | 1365-3040 0140-7791 |
| DOI: | 10.1111/pce.13746 |
| Popis: | Plants can enhance their defence against herbivorous insects by responding to insect egg depositions preceding larval feeding. The similarity of plant responses to insect eggs with those to phytopathogens gave rise to the hypothesis that egg-associated microbes might act as elicitors. We tested this hypothesis by investigating first if elimination of microbes in the butterfly Pieris brassicae changes the responses of Brassica nigra and Arabidopsis thaliana to eggs and larvae of this insect species. An antibiotic treatment of butterflies mitigated the plant transcriptional response to the eggs and the egg-mediated enhancement of the plant's defence against larvae. However, application of cultivated microbial isolates from the eggs onto Arabidopsis thaliana did not enhance the plant's anti-herbivore defence. Instead, application of an egg-associated glandular secretion, which is attaching the eggs to the leaves, elicited the enhancing effect on the plant's defence against larvae. However, this effect was only achieved when the secretion was applied in similar quantities as released by control butterflies, but not when applied in the reduced quantity as released by antibiotic-treated butterflies. We conclude that glandular secretions rather than egg-associated microbes act in a dose-dependent manner as elicitor of the egg-mediated enhancement of the plant's defence against insect larvae. |
| Databáze: | OpenAIRE |
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