A study of ryegrass architecture as a self-regulated system, using functional-structural plant modelling

Functional Plant Biology : FPB
Alban VerdenalAbraham J Escobar-Gutiérrez

Abstract

The canopy structure of grasslands is a major determinant of their use-value, as it affects the quantity and quality of the forage removed when mowed or grazed. The structure of this canopy is determined by individual plant architecture, which is highly sensitive to both environmental variations and management practices such as cutting regimes. In the case of perennial ryegrass (Lolium perenne L.), this architectural plasticity may partially be mediated by a self-regulation process, i.e. the actual state of the architecture (e.g. length of the pseudostem) may indirectly control some morphogenetic processes. To test the robustness of this hypothesis, we designed an exploratory model of ryegrass morphogenesis exhibiting this cybernetic behaviour. This functional-structural model is based on the L-system formalism. It was able to capture satisfactorily the major quantitative architectural traits of ryegrass under non-limiting growing conditions and under a cutting constraint. From these simulation results it appears that (i) self-regulation rules could be of practical use to ryegrass modelling, and (ii) when activated in an integrated model, they are not markedly incompatible with observations.

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Citations

Jul 18, 2020·Scientific Reports·Leonardo Silvestri SzymczakPaulo César de Faccio Carvalho
Nov 16, 2011·Annals of Botany·Theodore M DeJongAbraham J Escobar-Gutiérrez
Dec 7, 2013·Journal of Experimental Botany·Junqi ZhuJochem B Evers
Jun 5, 2020·Journal of Experimental Botany·Marion GauthierBruno Andrieu
May 12, 2020·Annals of Botany·Frédéric BoudonFrédéric Normand
Nov 28, 2012·The New Phytologist·Howard Thomas
Nov 15, 2011·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Luz del Carmen Lagunes EspinozaBernadette Julier

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