caa a22 4500 465821685 CHVBK 20180323112137.0 cr unu---uuuuu 170327e19901201xx s 000 0 eng 10.1007/BF00047244 doi (NATIONALLICENCE)springer-10.1007/BF00047244 Growth and development of root systems: Geometrical and structural aspects [Elektronische Daten] [Loïc Pages, Jocelyne Kervella] The agronomist who wants to study the nutrient and water uptake of roots needs a quantitative three-dimensional dynamic model of the structure of root systems. The model presented takes into account current knowledge about the morphogenesis of root systems. It describes the root system as a set of root axes, characterised by their orders. The morphogenetic properties of root axes differ according to their order. The axes of order 1 are directly inserted on the stem, the axes of order 2 are inserted on axes of order 1, and so on. They tend to be more plagiotropec and to have less vascular bundles as the order increases. The evolution of the simulated structure is achieved by three processes: emission of new root axes from the shoot, growth and branching of existing root axes. The elongation of an axis depends on its order and on local growing conditions. Branches appear acropetally at a specified distance from the apex and from former branches, along ranks facing xylem poles, with a branching angle specific of their order. From the three-dimensional branched structures simulated by the model, various outputs, such as kinetics of growth and development, root profiles or cross-section maps can be computed, compared to observed data and used as inputs in uptake models. Some examples of such possible outputs are presented. Kluwer Academic Publishers, 1990 Pages Loïc INRA, Station d'Agronomie, France aut Kervella Jocelyne Station de Recherches Fruitières Méditerranéennes, Domaine St.-Paul, F-84140, Montfavet aut Acta Biotheoretica Kluwer Academic Publishers 38/3-4(1990-12-01), 289-302 0001-5342 38:3-4<289 1990 38 10441 https://doi.org/10.1007/BF00047244 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00047244 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pages Loïc INRA, Station d'Agronomie, France aut NATIONALLICENCE 700 1- Kervella Jocelyne Station de Recherches Fruitières Méditerranéennes, Domaine St.-Paul, F-84140, Montfavet aut NATIONALLICENCE 773 0- Acta Biotheoretica Kluwer Academic Publishers 38/3-4(1990-12-01), 289-302 0001-5342 38:3-4<289 1990 38 10441 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer