Modeling the vacuolar storage of malate shed lights on pre- and post-harvest fruit acidity

Etienne, A; Génard, Michel; Lobit, Philippe; Bugaud, Christophe

doi:10.1186/s12870-014-0310-7

Cited by 8 publications

(3 citation statements)

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“…Fruit turgor pressure depends on carbon partitioning between soluble and insoluble solids. While soluble solids such as sugars and organic acids have rarely been the subject of modelling work, a sugar accumulation model (Génard and Souty, 1996) and two models for the accumulation of citrate (Lobit et al, 2003;Etienne et al, 2015) and malate (Lobit et al, 2006;Etienne et al, 2014) have been developed. The sugar accumulation model represents the transformation of phloemic sugars into different sugars accumulating in the fruit pulp (mainly sucrose, glucose and fructose), a part of which is used for synthesizing compounds other than sugars and for respiration.…”

Section: Process-based Modelling Of Fruit Growth and Qualitymentioning

confidence: 99%

Putting primary metabolism into perspective to obtain better fruits

et al. 2018

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Agricultural practice and breeding have successfully improved fruit metabolic traits, but both face the complexity of the interplay between development, metabolism and the environment. Thus, more fundamental knowledge is needed to identify further strategies for the manipulation of fruit metabolism. Nearly two decades of post-genomics approaches involving transcriptomics, proteomics and/or metabolomics have generated a lot of information about the behaviour of fruit metabolic networks. Today, the emergence of modelling tools is providing the opportunity to turn this information into a mechanistic understanding of fruits, and ultimately to design better fruits. Since high-quality data are a key requirement in modelling, a range of must-have parameters and variables is proposed.

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Section: Process-based Modelling Of Fruit Growth and Qualitymentioning

confidence: 99%

Putting primary metabolism into perspective to obtain better fruits

et al. 2018

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“…The malic acid sub-module is a description of the functioning of the malic acid transport from the cytosol to the vacuole as proposed in Lobit et al (2006) and Etienne et al (2014). This module uses as input the measured concentrations of minerals and concentrations of amino acids that were estimated, and predicts the malic acid concentration in the vacuole.…”

Section: The Virtual Fruit Modelmentioning

confidence: 99%

“…The stem water potential input was set at a constant value between 18.00 and 06.00 h. Then, it was set at a sinusoidal behavior (period of 12h) between 06.00 and 18.00 h, with a fixed maximum value at noon. Some values of the sub-modules parameters were chosen using literature-based values (Liu et al, 2007 for the growth sub-module; Luo et al, 2020, Etienne et al, 2014, and Etienne et al, 2015 for the submodules related to sugars, citric, and malic acid). A model calibration procedure was used to estimate the values of the remaining parameters.…”

Section: Model Inputs and Parameters Choicementioning

confidence: 99%

A virtual fruit model to simulate water deficit effects on water and solutes accumulation in the fruit and the consequences on fruit quality

Constantinescu¹,

Vercambre²,

Génard³

et al. 2022

Acta Hortic.

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Fruit size and solute composition are quality traits and are mainly determined by soluble sugars, acids, and mineral in concentrations that depend on water and solute translocation and metabolism. Water and sugar translocation depend on transport mechanisms that take place in the vascular system connecting the plant and the fruit. These transports are driven by the fruit water potential, which is determined by the concentrations of solutes in the fruit cell vacuoles. Nevertheless, this concentration determines the fruit osmotic potential itself. Therefore, there is strong feedback between the solutes and water translocation, metabolism, and fruit growth.Water deficit leads to changes in the water status of plants and therefore affects fruit growth. Understanding links between fruit growth processes and the plant growing conditions can be important to improve agricultural techniques and fruit quality. In this work, we show how we can describe such a complex system through a virtual fruit model, i.e. a process-based model composed of sub-modules that describe fruit growth and sugar and acid metabolism by using biophysical relationships.The model simulations well predicted the observed fruit size, and solutes concentrations of three cohorts of two commercial cultivars of tomato.We simulated the model on two scenarios of water deficit and we explored how the biophysical processes involved lead to changes in fruit growth with a focus on the role of sugar and acid accumulation and metabolism.The simulation results suggested that water deficit conditions could increase solutes concentrations and that dilution and osmotic potential changes are important variables to evaluate water deficit effects on fruit solutes content. The presented virtual fruit model is a promising tool to untangle the complex processes that involve fruit growth and to simulate environmental conditions for predicting response in fruit growth processes and their effect on fruit quality.

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