Modelling grape growth in relation to whole-plant carbon and water fluxes

Zhu, Junqi; Génard, Michel; Poni, Stefano; Gambetta, Grégory A.; Vivin, Philippe; Vercambre, Gilles; Trought, Michael C. T.; Ollat, Nathalie; Delrot, Serge; Dai, Zhanwu

doi:10.1093/jxb/ery367

Cited by 52 publications

(48 citation statements)

References 82 publications

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“…This is an oversimplification, but a useful one, and is not intended to supersede more rigorous attempts at modeling vine water use ( Lebon et al , 2003 ; Peccoux et al , 2018 ; Zhu et al, 2018 , 2019 ). Using this framework in a simplified thought experiment gives insight into the relative importance of the various traits.…”

Section: Introductionmentioning

confidence: 99%

The physiology of drought stress in grapevine: towards an integrative definition of drought tolerance

Gambetta

Herrera

Dayer

et al. 2020

Journal of Experimental Botany

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248

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Water availability is arguably the most important environmental factor limiting crop growth and productivity. Erratic precipitation patterns and increased temperatures resulting from climate change will likely make drought events more frequent in many regions, increasing the demand on freshwater resources and creating major challenges for agriculture. Addressing these challenges through increased irrigation is not always a sustainable solution so there is a growing need to identify and/or breed drought-tolerant crop varieties in order to maintain sustainability in the context of climate change. Grapevine (Vitis vinifera), a major fruit crop of economic importance, has emerged as a model perennial fruit crop for the study of drought tolerance. This review synthesizes the most recent results on grapevine drought responses, the impact of water deficit on fruit yield and composition, and the identification of drought-tolerant varieties. Given the existing gaps in our knowledge of the mechanisms underlying grapevine drought responses, we aim to answer the following question: how can we move towards a more integrative definition of grapevine drought tolerance?

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Section: Introductionmentioning

confidence: 99%

The physiology of drought stress in grapevine: towards an integrative definition of drought tolerance

Gambetta

Herrera

Dayer

et al. 2020

Journal of Experimental Botany

Self Cite

248

161

View full text Add to dashboard Cite

show abstract

“…Present knowledge about berry developmental biology derives essentially from the destructive analysis of sequential random samples taken as "representative". The average population at plot level is implicitly conceived as an ideal berry, whose gene expression and metabolic pathways are modulated by the G x E x M interaction, which has straightforward consequences on wine quality, explaining terroir and millesime effects (Fasoli et al, 2018;Zhu et al, 2019, among many others). However, density sorting (Singleton et al, 1966) has unambiguously showed that this "average" berry is a mixture of developmental stages (Zouid et al, 2013;Carbonell-Bejerano et al, 2016;Friedel et al, 2016;Liu et al, 2016;Bigard et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

First quantitative assessment of growth, sugar accumulation and malate breakdown in a single ripening berry

et al. 2020

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Background: Most approaches to grape physiology accept that the berry and the future harvest should display identical developmental features, which obviously requires synchronised fruits.Aims: Rejecting this assumption compels to revisit the kinetic and metabolic bases of berry ripening.Methods and Results: Two to three thousand berries were individually analysed for sugar, malate and weight. The huge heterogeneity in sugar and malic acid concentrations among fruits was mostly explained by time lags in the onset of sugar storage, which proved nearly as long as the second growth phase. Individual berries from different cultivars displayed similar kinetics following the normalisation of their maximal volume. Phloem sucrose unloading started at its maximum speed at softening, but growth resumed one week later. Four hexoses accumulated per malic acid, which was oxidised during the first two weeks of ripening, and then malate breakdown stopped without affecting sugar accumulation. Sugar and water accumulation were simultaneously arrested four weeks after softening, at 0.9 M hexose, at which point sugar concentration continued through water losses.Conclusions: The accepted sequential random sampling methods representative of average fruit and future wine compositions have led to a scrambled vision of grape developmental biology, presenting serious kinetic and composition biases. Single berry composition provides first quantitative evidence for the induction of a dominant H+/sucrose exchange on the tonoplast, which is first electro-neutralised by malate breakdown, then by ATP demanding H+ recirculation, in line with functional and molecular studies.Significance of the Study: The kinetics of single berry ripening are presented for the first time. A more reliable and reproducible model of berry growth, sugar import and malate breakdown is shown here, which have definitively been improved from a quantitative point of view. It illustrates that the temporal structure of a berry population may largely contribute to future wine quality, in addition to metabolic plasticity, thereby providing another target for the impact of GxE interaction. In this respect, addressing the structure of berry cohorts may provide a new approach regarding the developmental biology/terroir nexus.

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“…The dynamic approach was implemented based on L-Py, a programming language for Lindenmayer-systems. One of the latest functional-structural models for grapevine was designed to simulate berry quality based on carbon and water fluxes (e.g., [22,25,26], for GrapevineXL). This was achieved by linking a biomechanical gas exchange model and a complex water status model to local plant architectural conditions.…”

Section: Introductionmentioning

confidence: 99%

Modelling Approach for Predicting the Impact of Changing Temperature Conditions on Grapevine Canopy Architectures

et al. 2019

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Future climatic conditions might have severe effects on grapevine architecture, which will be highly relevant for vineyard management decisions on shoot positioning, pruning or cutting. This study was designed to help gaining insight into how, in particular, increasing temperatures might affect grapevine canopies. We developed a functional-structural model for Riesling, Virtual Riesling, based on digitised data of real plants and a comprehensive state-of-the-art data analysis. The model accounts for the variability in temperature-sensitive morphological processes, such as bud break and appearance rates. Our simulation study using historical weather data revealed significant effects of the thermal time course over the year on bud burst of the cane and on primary shoots. High variabilities in these events affect canopy growth and leaf area distribution. This report shows that Virtual Riesling can be useful in assessing the significance of changing temperatures for grapevine architecture and thereby considering management techniques such as vertical shoot positioning. Further developments of Virtual Riesling might support the knowledge gain for developing necessary adaptations in future vineyard management and, thus, facilitate future work on climate change research using functional-structural model approaches.

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Modelling grape growth in relation to whole-plant carbon and water fluxes

Abstract: This study developed and used an advanced whole-plant grapevine model to unravel factors affecting water and carbon fluxes during fleshy fruit growth.

Cited by 52 publications

References 82 publications

The physiology of drought stress in grapevine: towards an integrative definition of drought tolerance

The physiology of drought stress in grapevine: towards an integrative definition of drought tolerance

First quantitative assessment of growth, sugar accumulation and malate breakdown in a single ripening berry

Modelling Approach for Predicting the Impact of Changing Temperature Conditions on Grapevine Canopy Architectures

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