Root infection by the nematode Meloidogyne incognita modulates leaf antiherbivore defenses and plant resistance to Spodoptera exigua
| Autor: | Crispus M Mbaluto, Nicole M. van Dam, Ainhoa Martínez-Medina, Fredd Vergara |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
root-knot nematode
Physiology Plant Science Aboveground–belowground interactions Biology Spodoptera Plant Roots chemistry.chemical_compound Solanum lycopersicum Spodoptera exigua systemic induced responses Exigua medicine Meloidogyne incognita Root-knot nematode Animals Tylenchoidea Caterpillar AcademicSubjects/SCI01210 Jasmonic acid fungi food and beverages biology.organism_classification medicine.disease Research Papers phytohormones untargeted metabolomics Plant Leaves Horticulture Nematode Nematode infection chemistry Plant—Environment Interactions plant-mediated interactions Terra incognita |
| Zdroj: | Journal of Experimental Botany |
| ISSN: | 1460-2431 0022-0957 |
| Popis: | The impact of root infection by the nematode Meloidogyne incognita on leaf anti-herbivore defenses and plant resistance to the caterpillar Spodoptera exigua is modulated by the nematode infection cycle. Studies on plant-mediated interactions between root parasitic nematodes and aboveground herbivores are rapidly increasing. However, outcomes for the interacting organisms vary, and the mechanisms involved remain ambiguous. We hypothesized that the impact of root infection by the root-knot nematode Meloidogyne incognita on the performance of the aboveground caterpillar Spodoptera exigua is modulated by the nematode’s infection cycle. We challenged root-knot nematode-infected tomato plants with caterpillars when the nematode’s infection cycle was at the invasion, galling, and reproduction stages. We found that M. incognita root infection enhanced S. exigua performance during the galling stage, while it did not affect the caterpillar’s performance at the invasion and reproduction stages. Molecular and chemical analyses performed at the different stages of the nematode infection cycle revealed that M. incognita root infection systemically affected the jasmonic acid-, salicylic acid-, and abscisic acid-related responses, as well as the changes in the leaf metabolome triggered during S. exigua feeding. The M. incognita-induced leaf responses varied over the nematode’s root infection cycle. These findings suggest that specific leaf responses triggered systemically by the nematode at its different life-cycle stages underlie the differential impact of M. incognita on plant resistance against the caterpillar S. exigua. |
| Databáze: | OpenAIRE |
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