Co-optimization of Root Architecture for Water and Phosphorus Acquisition

在世界各地的自然和农业生态系统中，植物生产力受到水和磷可用性的限制。根系构型在稀缺土壤资源的获取中起着重要作用。以菜豆（Phaseolus vulgaris L.）为模型系统，确定了受遗传和环境因素（尤其是磷有效性）调控的特定根系构型特征。我们还证明了这些根系性状与植物对不同环境的适应有关。此外，我们已经开发了重组自交系的豆类分离这些性状，我们将在我们的研究中使用。本提案中概述的实验旨在更好地理解根构型与资源获取之间的关系，特别是在多种土壤资源有限的情况下。我们的总体目标是研究浅根结构与深根结构对水和磷获取的权衡，以及确定根结构可塑性的适应性重要性和对植物间竞争的潜在影响。该研究结果将具有重要的生态和农业意义，并有助于开发资源获取高效作物。

Plant productivity is limited by water and phosphorus availability in natural and agricultural ecosystems throughout the world. Root system architecture plays an important role in the acquisition of scarce soil resources. Using common bean (Phaseolus vulgaris L.) as a model system, we have identified specific root architectural traits that are regulated by genetic and environmental factors, particularly phosphorus availability. We have also demonstrated that these root traits are related to plant adaptation to different environments. In addition, we have developed Recombinant Inbred Lines of beans that segregate for these traits, which we will employ in our studies.Experiments outlined in this proposal aim to gain a better understanding of the relationship between root architecture and resource acquisition, particularly when multiple soil resources are limiting. Our overall objectives are to examine the tradeoffs of a shallow vs. deep root architecture for water and phosphorus acquisition, as well as to determine the adaptive importance of root architectural plasticity and the potential implications for interplant competition. The results from this work will have important ecological and agricultural significance, as well as aid in the development of resource acquisition efficient crops.