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| Home > Publications database > Drought-induced shifts in root morphology and rhizosphere microbiome assembly in Oenothera biennis upon drought stress |
| Home > Publications database > Drought-induced shifts in root morphology and rhizosphere microbiome assembly in Oenothera biennis upon drought stress |
| Poster (After Call) | FZJ-2025-02804 |
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2025
Abstract: Drought is a major factor limiting plant productivity worldwide. Certain wild plant species have developed specialized mechanisms for avoiding or tolerating drought that are not present in model plants or domesticated crops. Further, the relation of rhizosphere microbiota in the adaptation to drought stress responses is not resolved in wild plant species. Common evening-primrose (Oenothera biennis) is used for its high seed content of the triple unsaturated fatty acid gamma-linolenic acid, which is of great interest to the cosmetic, pharmaceutical and surfactant industries. Additionally, this plant species also thrives on rocky and sandy soils, such as dry waste ground, roadsides, and railway cuttings. Hence, O. biennis is an excellent model to investigate the influence of drought conditions on root morphology and rhizosphere microbiome assembly to gain more insight into drought tolerance adaptation. A drought stress experiment was performed using the automated GrowScreen-Rhizo III root phenotyping platform at Forschungszentrum Jülich for four weeks. The plants were grown in soil-filled rhizotrons with one transparent plate which allowed non-invasive measurements of root development over time. The experiment included three genotypes of O. biennis with strong responses to the applied stress on both shoot biomass level and root morphology. . Drought stress strongly reduced root growth of all genotypes and affected root system architectural traits, such as root system depth and width. Detailed analysis of the responses on root morphological traits of different genotypes is ongoing. In parallel, rhizosphere microbiota was targeted in the analysis. The results and possible implications of these studies on the drought stress response of a wild plant species are presented here.
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