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Improved Yield, Fruit Quality, and Shelf Life in ‘Flame Seedless’ Grapevine with Pre-Harvest Foliar Applications of Forchlorfenuron, Gibberellic Acid, and Abscisic Acid

Hoda A. Khalil
Hoda A. Khalil
   | 30. Juni 2020
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Online veröffentlicht: 30. Juni 2020
Seitenbereich: 77 - 86
Eingereicht: 01. Juli 2019
Akzeptiert: 01. Apr. 2020
DOI: https://doi.org/10.2478/johr-2020-0005
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© 2020 Hoda A. Khalil, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Effect of the growth regulators on lightness (L*), chroma (C*), hue (h°), and anthocyanin content of ‘Flame Seedless’ grape skin at harvest during 2016 and 2017 seasons

TreatmentsLCh°Anthocyanin (mg per 100 g fresh weight)
20162017201620172016201720162017
Control33.2±0.57c34.3±0.57b15.1±0.72a13.2±0.69b76.2±0.86c75.5±0.40c4.8±0.46a5.1±0.50b
GA338.3±0.37b39.1±0.37a16.1±0.43a16.2±0.38a90.1±0.72a89.1±0.25a2.3±0.14b3.9±0.05c
CPPU39.1±0.54b39.2±0.54a16.3±0.51a15.6±0.89a89.5±0.51a81.2±0.64b2.0±0.27b2.3±0.66d
GA3+CPPU40.9±0.26a39.6±0.26a16.9±0.38a16.0±0.50a86.1±0.28b90.1±0.40a2.3±0.86b3.5±0.12c
GA3+CPPU+ABA31.2±0.37d32.1±0.37c13.2±0.49b11.9±0.34a40.2±0.69d38.2±0.44d6.5±1.15a8.7±0.17a

Effect of the growth regulators on berries firmness (N), weight loss (%), shattering (%), and unmarketable berries (%) of ‘Flame Seedless’ grape after 7 days at 20 °C (RH = 80–85%) during 2016 and 2017 seasons

TreatmentsFirmness (N)Weight loss (%)Shattering (%)Unmarketable berries (%)
20162017201620172016201720162017
Control3.0±0.57aa3.0±0.05b6.5±0.28a7.4±0.23a25.3±0.49a29.5±0.86a7.5±0.28a9.6±0.51a
GA34.0±0.57a4.0±0.02a4.5±0.28bc4.9±0.23b10.2±0.11c12.3±0.40c2.9±0.34c3.0±0.57b
CPPU4.1±0.57a4.1±0.54a5.3±0.17b5.1±0.23b10.5±0.57c11.8±0.46c3.6±0.51bc3.5±0.28b
GA3+CPPU4.2±0.40a3.9±0.06a3.2±0.46d3.7±0.17c9.5±0.28c10.5±0.86c2.5±0.28 c3.2±0.0b
GA3+CPPU+ABA3.0±0.57a2.8±0.11b4.3±0.17c5.3±0.40b15.5±0.28b18.1±1.12b4.6±0.23b4.1±0.11b

Effect of the growth regulators on berry TSS, TA, firmness, and initial harvest of ‘Flame Seedless’ grape at harvest during 2016 and 2017 seasons

TreatmentsTSS (%)TA (%)Firmness (N)Initial harvest days comparing with the control (days)
20162017201620172016201720162017
Control19.7±0.11aa19.2±0.17 a0.69±0.01b0.70±0.01a3.9±0.11c3.2±0.30bzerozero
GA318.6±0.18b17.5±0.17b0.71±0.00b0.71±0.01a4.5±0.28b4.3±0.37a+8±0.01+7±0.01
CPPU18.1±0.23b17.1±0.23b0.70±0.01b0.70±0.01a5.2±0.25a4.5±0.28a+10±0.01+9±0.01
GA3+CPPU18.2±0.17 b17.7±0.17b0.74±0.01a0.72±0.01a4.9±0.08ab4.3±0.18a+11±0.01+10±0.01
GA3+CPPU+ABA20.1±0.57a19.0±0.31a0.69±0.01b0.70±0.01a3.8±0.11c3.2±0.47b−3±0.01−5±0.01

Effect of the growth regulators on yield, cluster weight, cluster length, the weight of 100 berries, and berry diameter of ‘Flame Seedless’ grape at harvest during 2016 and 2017 seasons

Yield per vine (kg)Cluster weight (g)Cluster length (cm)Weight of 100 berries (g)Berry diameter (cm)
2016201720162017201620172016201720162017
Control9.2±0.5c10.5±0.5c183.0±1.4d203±4.1e11.0±0.8b12.0±0.2c160±2.8c170±5.7d11.2±0.1d11.2±0.1c
GA312.1±1.1b13.0±0.6bc221.0±4.3c289.3±6.2d18.2±0.1a19.7±0.1a210±5.7b225±2.8c12.4±0.1c12.8±0.1bc
CPPU13.3±1.1ab13.2±0.7ab350.3±14.4b350.2±2.8b17.2±1.2a18.2±0.4b287±4.0a300±2.8b13.7±0.3b12.7±0.3bc
GA3+CPPU15.0±0.1a16.0±1.1a380.1±11.5a393.0±1.2a19.0±0.6a19.9±0.3a290±5.7a320±2.8 a14.4±0.3b14.1±0.2b
GA3+CPPU+ABA14.0±0.0ab13.1±0.5ab331±8.6b326.0±14.4c18.0±0.2a18.5±0.2b280±11.5a305±2.8b16.0±0.5a16.5±1.1a
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