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Plant water status and genotype affect fruit respiration in grapevines
Author(s) -
HernándezMontes Esther,
Escalona José Mariano,
Tomàs Magdalena,
Medrano Hipólito
Publication year - 2020
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/ppl.13093
Subject(s) - veraison , respiration , ripening , respiration rate , horticulture , growing season , biology , botany , chemistry , agronomy
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 CO 2 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 CO 2 efflux and plant water status was found at hard‐green stage. Genotype influenced the fruit CO 2 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.