Overcompensation of herbivore reproduction through hyper-suppression of plant defenses in response to competition
| Autor: | Robert C. Schuurink, Bernardus C. J. Schimmel, Juan M. Alba, Merijn R. Kant, Lívia Maria Silva Ataíde, Carlos A. Villarroel, Rachid Chafi |
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| Přispěvatelé: | Evolutionary and Population Biology (IBED, FNWI), Plant Physiology (SILS, FNWI) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Male Physiology media_common.quotation_subject overcompensation Zoology Plant Science Cyclopentanes Biology Competition (biology) 03 medical and health sciences Solanum lycopersicum Plant Growth Regulators Gene Expression Regulation Plant Plant defense against herbivory Animals defense suppression Tetranychus urticae Jasmonate Herbivory Oxylipins plant‐mediated interactions media_common Phaseolus Herbivore Full Paper Effector Host (biology) Research spider mites Tetranychus evansi fungi food and beverages Full Papers biology.organism_classification Plant Leaves 030104 developmental biology Female Solanum Salicylic Acid Tetranychidae competition tomato (Solanum lycopersicum) |
| Zdroj: | New Phytologist, 214(4), 1688-1701. Wiley-Blackwell The New Phytologist |
| ISSN: | 1469-8137 0028-646X |
| Popis: | Spider mites are destructive arthropod pests on many crops. The generalist herbivorous mite Tetranychus urticae induces defenses in tomato (Solanum lycopersicum) and this constrains its fitness. By contrast, the Solanaceae‐specialist Tetranychus evansi maintains a high reproductive performance by suppressing tomato defenses. Tetranychus evansi outcompetes T. urticae when infesting the same plant, but it is unknown whether this is facilitated by the defenses of the plant.We assessed the extent to which a secondary infestation by a competitor affects local plant defense responses (phytohormones and defense genes), mite gene expression and mite performance.We observed that T. evansi switches to hyper‐suppression of defenses after its tomato host is also invaded by its natural competitor T. urticae. Jasmonate (JA) and salicylate (SA) defenses were suppressed more strongly, albeit only locally at the feeding site of T. evansi, upon introduction of T. urticae to the infested leaflet. The hyper‐suppression of defenses coincided with increased expression of T. evansi genes coding for salivary defense‐suppressing effector proteins and was paralleled by an increased reproductive performance.Together, these observations suggest that T. evansi overcompensates its reproduction through hyper‐suppression of plant defenses in response to nearby competitors. We hypothesize that the competitor‐induced overcompensation promotes competitive population growth of T. evansi on tomato. |
| Databáze: | OpenAIRE |
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