The functions of phenotypic plasticity in plant-plant interactions and canopy productivity

表型可塑性在植物间相互作用和冠层生产力中的作用

• 批准号: 442020478
• 负责人: Professor Dr. Tsu-Wei Chen
• 金额: --
• 依托单位: Albrecht Daniel Thaer-Institut für Agrar- und Gartenbauwissenschaften
• 依托单位国家: 德国
• 项目类别: Independent Junior Research Groups
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/442020478?language=en
• 关键词: functions; phenotypic; plasticity; plant; interactions

In all agriculture systems and breeders’ fields, growing plants interact continuously with the microclimate created by their neighboring plants by adjusting their morphological and physiological characteristics. The ability of these adjustments, namely phenotypic plasticity, is essential for resource capture and fitness of individual plant in the canopy. However, phenotypic plasticity can favor competition of resource capture between plants and penalize total canopy productivity. Experimental methods which quantitatively dissect the effects of these plant-plant interactions on plant and canopy performance into physiologically interpretable parameters are astonishingly scarce until today. We propose to use recent advances in phenomics and 3D-dmodelling approach to understand the strategies of phenotypic plasticity for plant-plant interactions and their functional effects on canopy productivity. We plan to use 228 winter wheat genotypes to test seven main hypotheses related to the effects of plastic acclimations of leaf, stem and root traits on the resource capture, fitness of individual genotype in a heterogeneous canopy and the total canopy productivity. Genome-wide association study will be used to identify the genomic regions responsible for the plastic or invariant response of a trait to the environmental fluctuations. A mechanistic functional-structural plant model (FSPM) will be used to integrate the dynamic acclimation of leaf, stem and root to the microclimate in a canopy will be constructed to conduct large-scale virtual experiments, which allow identification of the ideal strategies for minimizing plant-plant competition and maximizing canopy productivity under various environmental scenarios. Furthermore, we propose a theoretical framework (TF) to predict the performance of a genotype grown in a homogenous canopy by correcting the performance of this genotype under heterogeneous canopy with its competitiveness. The proposed FSPM and TF are expected to provide insights into the design of agricultural systems (e.g. varietal mixture) and the selection bias due to plant-plant competition in the breeders´ fields, respectively.

在所有农业系统和育种领域中，生长中的植物通过调整其形态和生理特征，与邻近植物创造的小气候不断相互作用。这些调整的能力，即表型可塑性，对于冠层中单个植物的资源捕获和适应性至关重要。然而，表型可塑性可能有利于植物之间资源捕获的竞争，并损害冠层总生产力。迄今为止，将这些植物与植物相互作用对植物和冠层性能的影响定量分析为生理学可解释参数的实验方法仍然非常缺乏。我们建议利用表型组学和 3D 建模方法的最新进展来了解植物与植物相互作用的表型可塑性策略及其对冠层生产力的功能影响。我们计划使用 228 个冬小麦基因型来检验七个主要假设，这些假设涉及叶、茎和根性状的塑性驯化对资源捕获、异质冠层中个体基因型的适应性和冠层总生产力的影响。全基因组关联研究将用于识别负责性状对环境波动的可塑性或不变性反应的基因组区域。将使用机械功能结构植物模型（FSPM）将叶、茎和根的动态适应整合到冠层中的微气候中，以进行大规模虚拟实验，从而确定在各种环境情景下最小化植物间竞争和最大化冠层生产力的理想策略。此外，我们提出了一个理论框架（TF），通过校正异质冠层下基因型的性能及其竞争力来预测同质冠层中生长的基因型的性能。拟议的 FSPM 和 TF 预计将分别为农业系统的设计（例如品种混合物）和由于育种者田地中的植物间竞争而产生的选择偏差提供见解。