Abstract
Crimson Seedless is one of the most important table grape cultivars in the world, but often exhibits uneven berry color when grown in warm climates. Deficit irrigation is used extensively by growers during the ripening phase to advance fruit maturity and color, but there is a lack of information about the relationship between irrigation practices and fruit ripening variability. We imposed deficit irrigation in a commercial Crimson Seedless vineyard in the Maipo Valley, Chile, from veraison to harvest in two consecutive seasons. The fruit was tested for uniformity of Brix, firmness, and the color parameters “L”, “a”, “b”, and the Color Index of Red Grapes using analysis of variance on absolute residuals (Levene’s test). Postveraison water stress increased water productivity, Brix, and slightly improved berry coloration, but did not affect berry weight, size, or firmness. Moderate levels of water stress improved color uniformity at harvest, as lower values of leaf water potential were associated with a lower percentage of green berries that never matured. These results confirmed the role of deficit irrigation in the table grape ripening process. In contrast, extending the fruit ripening period by delaying harvest beyond 18 Brix did not increase color accumulation, but did increase berry shatter.
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Claims 7
Claim · model-written summary
Postveraison water stress increased water productivity and Brix.
Not reportedComparator
Verbatim
e0“Postveraison water stress increased water productivity, Brix, and slightly improved berry coloration”
t0“Grapes”
Claim · model-written summary
Postveraison water stress slightly improved berry coloration.
Not reportedComparator
Verbatim
e0“Postveraison water stress increased water productivity, Brix, and slightly improved berry coloration”
t0“Grapes”
Claim · model-written summary
Postveraison water stress did not affect berry weight, size or firmness.
Not reportedComparator
Verbatim
e0“Postveraison water stress increased water productivity, Brix, and slightly improved berry coloration, but did not affect berry weight, size, or firmness.”
t0“Grapes”
Claim · model-written summary
Moderate water stress improved harvest color uniformity.
Not reportedComparator
Verbatim
e0“Moderate levels of water stress improved color uniformity at harvest”
t0“Grapes”
Claim · model-written summary
Lower leaf water potential was associated with fewer green berries that never matured.
Verbatim
e0“lower values of leaf water potential were associated with a lower percentage of green berries that never matured.”
t0“Grapes”
Claim · model-written summary
Delaying harvest beyond 18 Brix did not increase color accumulation.
Not reportedComparator
Verbatim
e0“delaying harvest beyond 18 Brix did not increase color accumulation”
t0“Grapes”
Claim · model-written summary
Delaying harvest beyond 18 Brix increased berry shatter.
Not reportedComparator
Verbatim
e0“delaying harvest beyond 18 Brix did not increase color accumulation, but did increase berry shatter.”
t0“Grapes”
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