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首页> 外文期刊>Journal of Experimental Botany >To what extent may changes in the root system architecture of Arabidopsis thaliana grown under contrasted homogenous nitrogen regimes be explained by changes in carbon supply? A modelling approach
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To what extent may changes in the root system architecture of Arabidopsis thaliana grown under contrasted homogenous nitrogen regimes be explained by changes in carbon supply? A modelling approach

机译：在相反的同质氮制度下生长的拟南芥根系体系结构的变化在多大程度上可以通过碳供应的变化来解释？建模方法

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Root system architecture adapts to low nitrogen (N) nutrition. Some adaptations may be mediated by modifications of carbon (C) fluxes. The objective of this study was to test the hypothesis that changes in root system architecture under different N regimes may be accounted for by using simple hypotheses of C allocation within the root system of Arabidopsis thaliana. With that purpose, a model during vegetative growth was developed that predicted the main traits of root system architecture (total root length, lateral root number, and specific root length). Different experimental data sets crossing three C levels and two N homogenous nutrition levels were generated. Parameters were estimated from an experiment carried out under medium C and high N conditions. They were then checked under other C×N conditions. It was found that the model was able to simulate correctly C effects on root architecture in both high and low N nutrition conditions, with the same parameter values. It was concluded that C flux modifications explained the major part of root system adaptation to N supply, even if they were not sufficient to simulate some changes, such as specific root length.
机译：根系体系结构适应低氮（N）营养。某些适应可以通过碳（C）通量的修改来介导。这项研究的目的是检验以下假设：通过使用拟南芥根系内C分配的简单假设，可以解释不同N制度下根系体系结构的变化。为此，开发了一个营养生长期间的模型，该模型可预测根系体系结构的主要特征（总根长，侧根数和比根长）。产生了跨越三个C水平和两个N同质营养水平的不同实验数据集。根据在中等碳和高氮条件下进行的实验估算参数。然后在其他C×N条件下检查它们。发现该模型能够以相同的参数值正确模拟碳素对高氮和低氮营养条件下根系结构的影响。可以得出结论，即使C通量修改不足以模拟某些变化（例如特定根长），也可以解释根系适应氮供应的主要部分。

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