Cross-talk between high light stress and plant defence to the two-spotted spider mite in Arabidopsis thaliana
| Autor: | Barbara Karpinska, Małgorzata Kiełkiewicz, Anna Barczak-Brzyżek, K. Kot, Marcin Filipecki, Piotr Gawroński |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Food Chain Light Oviposition Arabidopsis 01 natural sciences 03 medical and health sciences Spider mite Stress Physiological Botany Arabidopsis thaliana Animals Tetranychus urticae Herbivory Chlorophyll fluorescence Herbivore Ecology biology fungi General Medicine biology.organism_classification Plant Leaves Light intensity 030104 developmental biology Fertility Animal ecology Insect Science Mutation Female Tetranychidae 010606 plant biology & botany Signal Transduction |
| Zdroj: | Experimentalapplied acarology. 73(2) |
| ISSN: | 1572-9702 |
| Popis: | Little is known about how plants deal with arthropod herbivores under the fluctuating light intensity and spectra which occur in natural environments. Moreover, the role of simultaneous stress such as excess light (EL) in the regulation of plant responses to herbivores is poorly characterized. In the current study, we focused on a mite-herbivore, specifically, the two-spotted spider mite (TSSM), which is one of the major agricultural pests worldwide. Our results showed that TSSM-induced leaf damage (visualized by trypan blue staining) and oviposition rate (measured as daily female fecundity) decreased after EL pre-treatment in wild-type Arabidopsis plants, but the observed responses were not wavelength specific. Thus, we established that EL pre-treatment reduced Arabidopsis susceptibility to TSSM infestation. Due to the fact that a portion of EL energy is dissipated by plants as heat in the mechanism known as non-photochemical quenching (NPQ) of chlorophyll fluorescence, we tested an Arabidopsis npq4-1 mutant impaired in NPQ. We showed that npq4-1 plants are significantly less susceptible to TSSM feeding activity, and this result was not dependent on light pre-treatment. Therefore, our findings strongly support the role of light in plant defence against TSSM, pointing to a key role for a photo-protective mechanism such as NPQ in this regulation. We hypothesize that plants impaired in NPQ are constantly primed to mite attack, as this seems to be a universal evolutionarily conserved mechanism for herbivores. |
| Databáze: | OpenAIRE |
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