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首页> 外文期刊>Journal of Experimental Botany >Model-assisted integration of physiological and environmental constraints affecting the dynamic and spatial patterns of root water uptake from soils
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Model-assisted integration of physiological and environmental constraints affecting the dynamic and spatial patterns of root water uptake from soils

机译：模型辅助整合的生理和环境约束条件会影响土壤根系水分吸收的动态和空间格局

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摘要

Due in part to recent progress in root genetics and genomics, increasing attention is being devoted to root system architecture (RSA) for the improvement of drought tolerance. The focus is generally set on deep roots, expected to improve access to soil water resources during water deficit episodes. Surprisingly, our quantitative understanding of the role of RSA in the uptake of soil water remains extremely limited, which is mainly due to the inherent complexity of the soil–plant continuum. Evidently, there is a need for plant biologists and hydrologists to develop together their understanding of water movement in the soil–plant system. Using recent quantitative models coupling the hydraulic behaviour of soil and roots in an explicit 3D framework, this paper illustrates that the contribution of RSA to root water uptake is hardly separable from the hydraulic properties of the roots and of the soil. It is also argued that the traditional view that either the plant or the soil should be dominating the patterns of water extraction is not generally appropriate for crops growing with a sub-optimal water supply. Hopefully, in silico experiments using this type of model will help explore how water fluxes driven by soil and plant processes affect soil water availability and uptake throughout a growth cycle and will embed the study of RSA within the domains of root hydraulic architecture and sub-surface hydrology.
机译：部分归因于根系遗传学和基因组学的最新进展，人们越来越关注根系体系结构（RSA），以提高其耐旱性。通常将重点放在深层根基上，以期在缺水事件期间改善对土壤水资源的获取。出乎意料的是，我们对RSA在土壤水分吸收中的作用的定量理解仍然非常有限，这主要是由于土壤-植物连续性的内在复杂性。显然，植物生物学家和水文学家需要共同发展对土壤－植物系统中水运动的理解。使用最新的定量模型在一个明确的3D框架中耦合土壤和根系的水力行为，本文表明RSA对根系水分吸收的贡献很难与根系和土壤的水力特性分开。也有人认为，传统的观点认为，无论是植物还是土壤都应该主导着水的提取方式，这种观点通常不适合水供应欠佳的农作物。希望使用这种类型的模型进行计算机模拟实验将有助于探索土壤和植物过程驱动的水通量如何在整个生长周期内影响土壤的水分利用和吸收，并将RSA的研究纳入根水力体系结构和地下区域水文学。

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