Analyzing the functional association among seed traits, berry growth and chemical composition in Cabernet-Sauvignon berry (&lt;em&gt;Vitis vinifera&lt;/em&gt; L.) using a mathematical growth function

Dai, Zhan Wu; Génard, Michel; Li, Shaohua; Vivin, Philippe

doi:10.20870/oeno-one.2009.43.1.807

Cited by 5 publications

(1 citation statement)

References 37 publications

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“…Price et al (2008) have developed а two-component mixture model based on normal distribution functions. Dai et al (2009) applied а combination of monomolecular and logistic functions to analyse the dependencies between the function parameters and berry quality features. In a study on dry matter growth, García de Cortázar-Atauri et al (2009) proposed a classical double logistic model based on thermal time (Growing Degree Days) and dry mass with two complementary dynamics: exponential and logistic growth.…”

Section: Introductionmentioning

confidence: 99%

Metrics for studying berry growth kinetics in seedless grape cultivars (Vitis vinifera L.)

2021

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The process related to the changes in dimensions and mass of grape berry passes through two growth phases separated by a lag phase, and can be described by a double sigmoid curve. The onset of the growth phases and their duration are important factors for understanding the growth processes in grape berries. A new method for their quantitative determination was developed in the present study. In this method, the phase transition dates correspond to the times at which the rate of change of the curvature of the logistic (sigmoid) curve reaches an extreme value. The method was tested on three seedless grape varieties, Sultanina, Ruby Seedless and Rusalka 3, and the changes in grape berry dimensions and mass were tracked from anthesis to harvest. For each of the varieties, a double logistic model of change in berry length, width and mass from anthesis to harvest was developed and the metrics of growth - beginning, stabilisation and end of growth - for each of the two phases were determined. It was found that the metrics in mass and berry dimensions do not match and shift relative to each other over time. A comparison of growth metrics with phenological metrics, such as anthesis, veraison and ripening, showed that phenophases cannot be used as a time scale to record the acceleration of growth processes, as they shifted in time with growth metrics. An exception was veraison, which coincided with the beginning of the accelerated growth of grapes during the second growth phase, following the lag phase. The time scale presented in the current research is a new tool for monitoring growth processes and could help clarify the links between visible changes in the grape berries and the ongoing processes within them. The developed method can also be used for the analysis of various growth processes that follow the logistic law.

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Section: Introductionmentioning

confidence: 99%

Metrics for studying berry growth kinetics in seedless grape cultivars (Vitis vinifera L.)

2021

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Near-infrared real time non-destructive monitoring of sugar accumulation reveals that single berries ripen two times faster than previously documented on standard asynchronous samples

Tavernier,

Motelica-Heino,

Thomas

et al. 2024

Preprint

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Understanding how climate change impacts berry ripening physiology is essential for selecting genotypes that balance sugars and acids under warming conditions. In this context, we used a portable near-infrared spectrometer in the vineyard, to monitor sugar and acid evolution in individual berries from 10 grapevine varieties over two years. Spectra were periodically acquired on the same berries all along ripening, and a subset of these berries was also collected for sugars and organic acids quantification by HPLC, to train partial least square regression models. Prediction models for glucose, fructose, and malic acid concentrations were fairly accurate with validation R2 of 0.71, 0.64, and 0.55, respectively. We further used these models to study sugar accumulation in individual berries and observed that the single berries ripen two times faster than average samples. Our results pave avenues toward precise quantitative approaches on sugar and acid fluxes in berry ripening studies.

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Asynchronous dynamics of grapevine ("Vitis vinifera") maturation: experimental study for a modelling approach

Cortázar-Atauri

Brisson²,

Ollat

et al. 2009

OENO One

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Aims: An analysis of the asynchrony and dynamics of dry matter accumulation and water content in the grape berries growth period (Vitis vinifera L.) was carried out on a macroscopic scale (berry population). Experimental studies suggest a framework to evaluate the asynchronous nature of grapevine maturation and to propose a simple model to simulate dry matter and water dynamics.Methods and results:Amethodology based on the measurement of the density of the berries was used, providing information on the dry matter, water content and distribution of the berry populations during the veraison - harvest period. The main experiment was carried out in Rhone valley vineyards on the«Grenache N » and « Syrah » varieties. Additional information was gathered in Burgundy vineyards on « Pinot noir » and « Chardonnay » varieties. A relationship between the sugar content (°Brix) and water content of a berry was observed, which was robust and identical for all varieties. The asynchronous nature of berry growth was confirmed and densimetry allows quantifying the homogeneity of harvest. A model was proposed to modelling dry matter growth, based on thermal time and final potential dry weight. A single relationship was obtained for the two varieties studied which seemed to be independent of field conditions (soil and year). To model water content dynamics (or °Brix, using the relationship obtained between them), two components were defined, one of which is related to the berry phenological stage and the other depends on the water status of the plant.Conclusion: The results provide a conceptual framework to better understand and represent the dynamics of dry matter accumulation and water content of a population of grape berries, and to evaluate the asynchronous nature of grapevine maturity.Significance and impact of the study: The models and relationships proposed could be used as a tool to better identify and understand key factors and processes occurring in the field until the detailed processes of berry growth are better understood and can be incorporated into the model. This model could be incorporated into a crop model of vine growth.

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Analyzing the functional association among seed traits, berry growth and chemical composition in Cabernet-Sauvignon berry (<em>Vitis vinifera</em> L.) using a mathematical growth function

Cited by 5 publications

References 37 publications

Metrics for studying berry growth kinetics in seedless grape cultivars (<i>Vitis vinifera</i> L.)

Metrics for studying berry growth kinetics in seedless grape cultivars (<i>Vitis vinifera</i> L.)

Near-infrared real time non-destructive monitoring of sugar accumulation reveals that single berries ripen two times faster than previously documented on standard asynchronous samples

Asynchronous dynamics of grapevine ("Vitis vinifera") maturation: experimental study for a modelling approach

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