Plant water status and genotype affect fruit respiration in grapevines

An understanding of fruit gas exchange is necessary to determine the carbon balance in grapevines, but little attention has been paid to the relationships among fruit respiration, plant water status and genetic variability. The effect of plant water status and genotype on cluster respiration was stu...

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Bibliographic Details
Published in:Physiologia plantarum 2020-08, Vol.169 (4), p.544-554
Main Authors: Hernández‐Montes, Esther, Escalona, José Mariano, Tomàs, Magdalena, Medrano, Hipólito
Format: Article
Language:English
Subjects:
Carbon
Carbon dioxide
Clusters
Developmental stages
Efflux
Environmental conditions
Environmental effects
Fluxes
Fruits
Gas exchange
Genetic variability
Genotype & phenotype
Genotypes
Respiration
Ripening
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Summary:An understanding of fruit gas exchange is necessary to determine the carbon balance in grapevines, but little attention has been paid to the relationships among fruit respiration, plant water status and genetic variability. The effect of plant water status and genotype on cluster respiration was studied over two seasons (2013 and 2014) under field conditions using a whole cluster respiration chamber. Whole cluster CO2 fluxes were measured in growing grapevines at hard‐green, veraison and ripening stages under irrigated and non‐irrigated conditions, and under light and dark conditions in two grapevine varieties, Tempranillo and Grenache. A direct relationship between cluster CO2 efflux and plant water status was found at hard‐green stage. Genotype influenced the fruit CO2 efflux that resulted in higher carbon losses in Tempranillo than in Grenache. Fruit respiration rates decreased from the first berry developmental stages to ripening stage. The integration of fruit respiration rates under light and dark conditions showed the magnitude of fruit carbon losses and gains as well as interesting variety and environmental conditions effects on those processes.
ISSN:0031-9317
1399-3054
DOI:10.1111/ppl.13093