Growth User Guide#

Introduction#

Growth simulates leaf growth in mass according to leaf elongation calculated in Morphogenesis. For non-emerged leaves, a empiric and constant relation between leaf length and its structural mass is used. For emerged leaves, the structural mass growth is computed from their green area (given by a geometrical model such as Adel-Wheat) and a surfacic mass defined by Morphogenesis. According to the computed increase in structural mass, Growth calculates the related consumption of sucrose and amino acids. Growth also handles the transfer of CN metabolites between the hiddenzone and the newly emerged part of the leaf if any. When Growth is coupled to openalea.cnwgrass.hydraulics (hydraulics=True), then leaf mass increase is completely attributed to the lamina during its growth. At the end of leaf elongation, its mass and solutes are distributed between the lamina and the sheath. Root growth and the related metabolite consumption are regulated by the local concentration of sucrose. The maximal rate of root growth also depends on the reproductive status of the plant. When Growth is coupled to openalea.cnwgrass.hydraulics (hydraulics=True), root growth also depends on the xylem water potential.

Inputs of Growth#

  • Initial structural masses (g), dimensions (m) of each hiddenzone + the green area for laminae, sheaths and internodes

  • Initial content of the metabolites calculated by CN-Metabolism (µmol)

  • ‘xylem_water_potential’: the water potential of the xylem (MPa)

Details on each inputs are given in the docstring.

Outputs of Growth#

Updated structural masses for hiddenzones, shoot organs and roots Updated CN metabolites contents

Details on each outputs are given in the docstring.

Package architecture#

Growth is a Python package which consists of several Python modules: