| Title: | Leafminer attack accelerates the development of soil-dwelling conspecific pupae via plant-mediated changes in belowground volatiles |
| Author(s): | Escobar-Bravo R; Schimmel BCJ; Glauser G; Klinkhamer PGL; Erb M; |
| Address: | "Institute of Plant Sciences, University of Bern, Bern, 3013, Switzerland. Institute of Biology of Leiden, Leiden University, Leiden, 2333 BE, the Netherlands. Neuchatel Platform of Analytical Chemistry, University of Neuchatel, Neuchatel, 2000, Switzerland" |
| ISSN/ISBN: | 1469-8137 (Electronic) 0028-646X (Print) 0028-646X (Linking) |
| Abstract: | "Herbivore population dynamics are strongly influenced by the interactions established through their shared host. Such plant-mediated interactions can occur between different herbivore species and different life developmental stages of the same herbivore. However, whether these interactions occur between leaf-feeding herbivores and their soil-dwelling pupae is unknown. We studied whether tomato (Solanum lycopersicum) leaf herbivory by the American serpentine leafminer Liriomyza trifolii affects the performance of conspecific pupae exposed to the soil headspace of the plant. To gain mechanistic insights, we performed insect bioassays with the jasmonate-deficient tomato mutant def-1 and its wild-type, along with phytohormones, gene expression and root volatiles analyses. Belowground volatiles accelerated leafminer metamorphosis when wild-type plants were attacked aboveground by conspecifics. The opposite pattern was observed for def-1 plants, in which aboveground herbivory slowed metamorphosis. Leafminer attack induced jasmonate and abscisic acid accumulation and modulated volatile production in tomato roots in a def-1-dependent manner. Our results demonstrate that aboveground herbivory triggers changes in root defence signalling and expression, which can directly or indirectly via changes in soil or microbial volatiles, alter pupal development time. This finding expands the repertoire of plant-herbivore interactions to herbivory-induced modulation of metamorphosis, with potential consequences for plant and herbivore community dynamics" |
| Keywords: | Animals *Herbivory Insecta Plant Growth Regulators/metabolism Plant Roots/metabolism Pupa *Soil aboveground-belowground jasmonates leafminer pupation roots salicylic acid tomato volatiles; |
| Notes: | "MedlineEscobar-Bravo, Rocio Schimmel, Bernardus C J Glauser, Gaetan Klinkhamer, Peter G L Erb, Matthias eng Research Support, Non-U.S. Gov't England 2022/01/15 New Phytol. 2022 Apr; 234(1):280-294. doi: 10.1111/nph.17966. Epub 2022 Feb 2" |
