Modelling root plastic responses to soil water status heterogeneity
(2023) FSPM2023 — Location: Berlin, Germany (27.March.2023)
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- Abstract
- Finding plants that are well adapted hydraulically to specific pedo-climatic environments is aimed for present and future yield improvement and increasing the sustainability of our crop systems. Cultivated plants that have been selected through traditional farming systems in a region are most likely to express very different root anatomies and root hydraulic properties from place to place. These germplasms may have developed a root system hydraulic architecture particularly adapted in their location. A better understanding of the underlying properties could be put at use to target strategies, if needed, which could increase their water uptake in these specific environments. Here, we associated different models into a structured network (figure 1) to virtually simulate water flow in the soil-root system over 30 days of crop development. This pipeline was built so we could pinpoint specific root anatomical traits, sub-cellular hydraulic properties and maturation rate which could improve the root water uptake in a chosen pedo-climatic environment. We tested this hypothesis on maize plants (Zea mays variety B73) and in three pedological conditions under a high evaporative demand and water limiting conditions. We generated 7168 maize plants from a single set of architecture traits but varying sets of anatomical traits, sub-cellular hydraulic properties and maturation rates and analysed their root water uptake dynamics in all three environments.
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Citations
Heymans, A., & Javaux, M. (2023). Modelling root plastic responses to soil water status heterogeneity. FSPM2023, Berlin, Germany. https://hdl.handle.net/2078.5/260273