Oscillations in Functional Structural Plant Growth Models

Mathieu, Alexandre; Letort, Véronique; Cournède, Paul-Henry; Zhang, Bao Gui; Heuret, Patrick; Reffye, Philippe de

doi:10.1051/mmnp/20127603

Cited by 9 publications

(2 citation statements)

References 31 publications

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“…Kang et al (2011) found correlations between fruit-set probabilities and supply-to-demand ratio on tomato plants but the resulting relationship was not implemented in the model: fruit position was forced as observed. Mathieu et al (2012) reported that periodic fruit-set patterns can be simulated in an FSPM when it is controlled by sourcesink ratio: oscillations can be generated for certain ranges of parameter values, a pattern often observed in particular in fruit trees. Using a GL4-like model for grapevine but with an estimation procedure that relied for some part on a deterministic version of the model and that did not consider the average age of individual phytomers, Pallas et al (2010) found that the rate of phytomer appearance according to thermal time was strongly affected by the plant's trophic status.…”

Section: Use Of Q/d Ratio As a Regulating Variablementioning

confidence: 99%

Internal trophic pressure, a regulator of plant development? Insights from a stochastic functional–structural plant growth model applied to Coffea trees

et al. 2020

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Background and Aims Using internal trophic pressure as a regulating variable to model the complex interaction loops between organogenesis, production of assimilates and partitioning in functional–structural models of plant growth has attracted increasing interest in recent years. However, this approach is hampered by the fact that internal trophic pressure is a non-measurable quantity that can be assessed only through model parametric estimation, for which the methodology is not straightforward, especially when the model is stochastic. Methods A stochastic GreenLab model of plant growth (called ‘GL4’) is developed with a feedback effect of internal trophic competition, represented by the ratio of biomass supply to demand (Q/D), on organogenesis. A methodology for its parameter estimation is presented and applied to a dataset of 15 two-year-old Coffea canephora trees. Based on the fitting results, variations in Q/D are reconstructed and analysed in relation to the estimated variations in organogenesis parameters. Key Results Our stochastic retroactive model was able to simulate realistically the progressive set-up of young plant architecture and the branch pruning effect. Parameter estimation using real data for Coffea trees provided access to the internal trophic dynamics. These dynamics correlated with the organogenesis probabilities during the establishment phase. Conclusions The model can satisfactorily reproduce the measured data, thus opening up promising avenues for further applying this original procedure to other experimental data. The framework developed can serve as a model-based toolkit to reconstruct the hidden internal trophic dynamics of plant growth.

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Section: Use Of Q/d Ratio As a Regulating Variablementioning

confidence: 99%

Internal trophic pressure, a regulator of plant development? Insights from a stochastic functional–structural plant growth model applied to Coffea trees

et al. 2020

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“…We focus on Cecropia obtusa Trécul (Urticaceae), a widespread Guiana shield generalist species, capable of growing on both FS and WS, and displaying perennial growth marks, which allow for an analysis of life history based on architecture analysis (growth, branching, flowering) through time, making C. obtusa a model species for tree architecture and growth (Heuret et al 2002;Zalamea et al 2008;Mathieu et al 2012;Letort et al 2012). We measured commonly used functional leaf and wood traits, coupled with the growth trajectory (i.e.…”

Section: Introductionmentioning

confidence: 99%

Soil variation response is mediated by growth trajectories rather than functional traits in a widespread pioneer Neotropical tree

Levionnois¹,

Tysklind²,

Nicolini³

et al. 2023

Peer Community Journal

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1. Trait-environment relationships have been described at the community level across tree species. However, whether interspecific trait-environment relationships are consistent at the intraspecific level is yet unknown. Moreover, we do not know how consistent is the response between organ vs. whole-tree level. 2. We examined phenotypic variability for 16 functional leaf (dimensions, nutrient, chlorophyll) and wood traits (density) across two soil types, Ferralitic Soil (FS) vs. White Sands (WS), on two sites for 70 adult trees of Cecropia obtusa Trécul (Urticaceae) in French Guiana. Cecropia is a widespread pioneer Neotropical genus that generally dominates early successional forest stages. To understand how soil types impact resource use through the processes of growth and branching, we examined the architectural development with a retrospective analysis of growth trajectories. We expect soil types to affect both, functional traits in relation to resource acquisition strategy as already described at the interspecific level, and growth strategies due to resource limitations with reduced growth on poor soils. 3. Functional traits were not involved in the soil response, as only two traits -leaf residual water content and K content-showed significant differences across soil types. Soil effects were stronger on growth trajectories, with WS trees having the slowest growth trajectories and less numerous branches across their lifespan. 4. The analysis of growth trajectories based on architectural analysis improved our ability to characterise the response of trees with soil types. The intraspecific variability is higher for growth trajectories than functional traits for C. obtusa, revealing the complementarity of the architectural approach with the functional approach to gain insights on the way trees manage their resources over their lifetime. Soil-related responses of Cecropia functional traits are not the same as those at the interspecific level, suggesting that the effects of the acting ecological processes are different between the two levels. Apart from soil differences, much variation was found across sites, which calls for further investigation of the factors shaping growth trajectories in tropical forests.

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Crown reaction and acclimation to cyclical V-trimming of city trees: An analysis using terrestrial laser scanning

Lecigne

Delagrange

Messier

2018

Urban Forestry & Urban Greening

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Oscillations in Functional Structural Plant Growth Models

Cited by 9 publications

References 31 publications

Internal trophic pressure, a regulator of plant development? Insights from a stochastic functional–structural plant growth model applied to Coffea trees

Internal trophic pressure, a regulator of plant development? Insights from a stochastic functional–structural plant growth model applied to Coffea trees

Soil variation response is mediated by growth trajectories rather than functional traits in a widespread pioneer Neotropical tree

Crown reaction and acclimation to cyclical V-trimming of city trees: An analysis using terrestrial laser scanning

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