Article Figures & Data
Figures
- Figure 1
Progression of color change during veraison of Merlot grape clusters in southeastern Washington in 2016. (A) Color images were transformed to gray scale using ImageJ to quantify the rate of color change. (B) Percentage color change over successive days of year (DOY) as estimated from the transformed images. Different symbols and lines represent five individual clusters.
- Figure 2
Changes in fresh weight (FW; A) and total soluble solids (TSS; B) across five developmental stages of Syrah grape berries in southeastern Washington in 2014. Berries were sampled according to their firmness to the touch and skin color (GH = green hard; GS = green soft; BP = blush/pink; RP = red/purple; B = blue) by five different people (A, B, C, D, E). Different uppercase letters denote significant differences among stages within each person; different lowercase letters denote significant differences among persons within each stage according to Tukey’s test (p < 0.05, n = 10 berries). Insets show typical berries at each sampled stage.
- Figure 3
Relationship between total soluble solids (TSS) and fresh weight (FW) across seven developmental stages (GH = green hard; GS = green soft; BP = blush/pink; RP = red/purple; B = blue; R = ripe; OR = overripe) of Merlot (A) and Syrah (B) grape berries in southeastern Washington over three years. Values are means ± SE of 10 berries in 2014, five to 15 berries in 2015, and 50 berries in 2016.
- Figure 4
Changes in fresh weight (FW; A) and elastic modulus (E; B) across seven developmental stages (GH = green hard; GS = green soft; BP = blush/pink; RP = red/purple; B = blue; R = ripe; OR = overripe) of Merlot grape berries in southeastern Washington in 2016. The central line in each box plot indicates the median, box boundaries indicate the 25th and 75th percentiles, whiskers indicate the 10th and 90th percentiles, black circles represent outliers outside the 5th and 95th percentiles. Different letters indicate significant differences among developmental stages according to Tukey’s test (p < 0.05, n = 12 samples of 12 to 15 berries each).
- Figure 5
Relationship between total soluble solids (TSS) and fresh weight (FW; A) and elastic modulus (E; B) across seven developmental stages (GH = green hard; GS = green soft; BP = blush/pink; RP = red/purple; B = blue; R = ripe; OR = overripe) of Merlot grape berries in southeastern Washington in 2016. Each symbol represents a sample of 12 to 15 berries.
- Figure 6
Relationship between elastic modulus (E) and berry sugar content (A) and between E and fresh weight (FW; B) across seven developmental stages (GH = green hard; GS = green soft; BP = blush/pink; RP = red/purple; B = blue; R = ripe; OR = overripe) of Merlot grape berries in southeastern Washington in 2016. Inset shows the same relationship with GH berries excluded. Each symbol represents a sample of 12 to 15 berries.
- Figure 7
Relationship between fresh weight (FW) and skin mass per area ratio (SMA) across seven developmental stages (GH = green hard; GS = green soft; BP = blush/pink; RP = red/purple; B = blue; R = ripe; OR = overripe) of Merlot grape berries in southeastern Washington in 2016. Each symbol represents a sample of 12 to 15 berries.
- Figure 8
Changes in concentrations of total soluble solids (TSS; A), titratable acidity (TA; B), malate (C), tartrate (D), pH (E), and anthocyanins (F) across seven developmental stages (GH = green hard; GS = green soft; BP = blush/pink; RP = red/purple; B = blue; R = ripe; OR = overripe) of Merlot grape berries in southeastern Washington in 2016. The central line in each box plot indicates the median, box boundaries indicate the 25th and 75th percentiles, whiskers indicate the 10th and 90th percentiles, black circles represent outliers outside the 5th and 95th percentiles. Different letters indicate significant differences among developmental stages according to Tukey’s test (p < 0.05, n = 12 samples of 12 to 15 berries each).
- Figure 9
Changes in content per berry of sugar (A), titratable acidity (TA; B), malate (C), and tartrate (D) across seven developmental stages (GH = green hard; GS = green soft; BP = blush/pink; RP = red/purple; B = blue; R = ripe; OR = overripe) of Merlot grape berries in southeastern Washington in 2016. The central line in each box plot indicates the median, box boundaries indicate the 25th and 75th percentiles, whiskers indicate the 10th and 90th percentiles, black circles represent outliers outside the 5th and 95th percentiles. Different letters indicate significant differences among developmental stages according to Tukey’s test (p < 0.05, n = 12 samples of 12 to 15 berries each).
- Figure 10
Relationship between total soluble solids (TSS) and titratable acidity (TA; A, B), malate (C, D), pH (E), protons (H+; F), and anthocyanins (G, H) across seven developmental stages (GH = green hard; GS = green soft; BP = blush/pink; RP = red/purple; B = blue; R = ripe; OR = overripe) of Merlot grape berries in southeastern Washington in 2016. Panels A, C, E, G show concentrations, and panels B, D, F, H show contents per berry. Each symbol represents a sample of 12 to 15 berries.
- Figure 11
Relationship between malate and titratable acidity (TA; A) and pH (B) across seven developmental stages (GH = green hard; GS = green soft; BP = blush/pink; RP = red/purple; B = blue; R = ripe; OR = overripe) of Merlot grape berries in southeastern Washington in 2016. Each symbol represents a sample of 12 to 15 berries.
- Figure 12
Relationship between titratable acidity (TA) and pH across seven developmental stages (GH = green hard; GS = green soft; BP = blush/pink; RP = red/purple; B = blue; R = ripe; OR = overripe) of Merlot grape berries in southeastern Washington in 2016. Each symbol represents a sample of 12 to 15 berries.
Tables
- Table 1
Grape berry physical properties and total soluble solids (TSS) across three to seven developmental stages (GH = green hard; GS = green soft; BP = blush/pink; RP = red/purple; B = blue; R = ripe; OR = overripe; Y = yellow) in different wine, table, and juice grape cultivars in southeastern Washington in 2014. Values are means of 10 (≥5 for OR) berries ± SE. FW, fresh weight.
- Table 2
Duration of developmental stages (GH = green hard; GS = green soft; BP = blush/pink; RP = red/purple; B = blue), distinguished visually and by touch, after fruit set of Merlot and Syrah grape berries in southeastern Washington over three years (DOY = day of year). Values are means of 50 berries ± SE.
- Table 3
Summary of temperature conditions at the Irrigated Agriculture Research and Extension Center in southeastern Washington during three growing seasons. Data were collected by a local AgWeatherNet station. All data except growing degree days (GDD) apply to the average period of the green soft to blue transition (GS‒B) of 50 separate Merlot and Syrah berries, as shown in Table 2.
Supplemental Figure 1 Merlot grape cluster undergoing veraison (DOY = day of year). Photographs of the same cluster were taken repeatedly against a dark cloth background.
Vol 72 Issue 2
