Model-based analysis of sugar accumulation in response to source-sink ratio and water supply in grape (Vitis vinifera) berries

Functional Plant Biology : FPB
Zhan Wu DaiMichel Génard

Abstract

The dynamics of sugar (hexose) concentration in ripening grape berries (Vitis vinifera L.) were simulated with a refined mechanistic model. Changes in sugar concentration were reproduced by the sum of sugar import (S), sugar metabolism (M) and water budget (W). S and W were derived from model inputs of fresh and dry mass, and M was simulated with a relative metabolism rate describing the depletion of hexose. The relative metabolism rate was associated with the relative growth rate of dry mass with a coefficient (k) that was constant for a given cultivar under various growth conditions (temperature, water supply, and source-sink ratio) but varied with genotype. The k value was ~20% higher for cv. Merlot than for cv. Cabernet Sauvignon, indicating more imported sugars would be depleted by Merlot than Cabernet Sauvignon. The model correctly simulated the negative effect of lowered leaf-to-fruit  ratio and the positive effect of water shortage on sugar concentration. Sensitivity analysis revealed that the present model was weakly sensitive to k because of sugar accumulation being predominantly controlled by S, with M relatively small (~20%) with respect to the increment of sugar concentration. Model simulation indicated that the de...Continue Reading

References

Nov 10, 1998·Plant Physiology·K J NunanG B Fincher
Apr 20, 2004·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·B QuilotF Lescourret
Oct 12, 2005·Trends in Plant Science·Paul C StruikPieter de Visser
Jan 1, 1958·Plant Physiology·C A Swanson, E D El-Shishiny
Jun 1, 1966·Plant Physiology·W M Kliewer
Jul 27, 2006·Journal of Experimental Botany·Markus KellerBhaskar R Bondada
Feb 7, 2007·Journal of Experimental Botany·M GénardB Quilot
Nov 24, 2007·BMC Genomics·Laurent G DelucGrant R Cramer

❮ Previous
Next ❯

Citations

Oct 26, 2018·Journal of Experimental Botany·Junqi ZhuZhanwu Dai
May 14, 2014·Journal of Experimental Botany·Julie RipollNadia Bertin
Jun 1, 2016·Frontiers in Plant Science·Zhanwu DaiMichel Génard
Nov 19, 2014·BMC Plant Biology·Audrey EtienneChristophe Bugaud
Dec 11, 2020·Journal of Experimental Botany·Megan K Bartlett, Gabriela Sinclair
Feb 23, 2021·Frontiers in Plant Science·Bruno SuterCornelis van Leeuwen

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.