ibclogo XVI International Botanical Congess


Abstract Number: 5941
Session = 12.12.2


AUTOMATA AND WATER USE EFFICIENCY FOR TREE GROWTH AND TREE ARCHITECTURE


Ph. deReffye, F. Blaise, F. Houllier, T. Fourcaud, D. Barthelemy (CIRAD, FRANCE)


Stochastic models are well adapted for modeling bud growth and death and branching patterns. They generate a topological description of the plant that allow a faithful simulation of its development. Fresh matter production is computed from water transpiration, using the concepts of water use efficiency and hydraulic architecture, the biomass and size of plant components are calculated according to source-sink-based allocation rules and to organ allometric rules, plant hydraulic architecture is obtained as a result of these rules. This growth model is iterative and works in a cyclic way, it includes feed- ack processes between plant architecture, growth, and functioning. Starting from the seed, it is possible to compute biomass production and geometry of a virtual plant. This model provides good results on real plants.


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