Effect of Leaf Removal on Coloration Improvement of Red variety ‘Hongisul’ Grape

Nam, Jong-Chul; Chang, Eun-Ha; H, Yang; Cho, Eun-Kyung; Jung, Sung-Min; Hur, Yun Jung; Koh, Sang-Wook; Choi, Ikseon

doi:10.12719/ksia.2016.28.2.231

Cited by 2 publications

(1 citation statement)

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“…On the other hand, fruit of the chelate compound-treated groups had better coloration than the control fruit because of the defoliation and improved light interception in the treated groups (Jackson et al, 1971). These results are consistent with several previous reports showing that defoliation can improve fruit coloration (Bae and Lee, 1995; Choi et al, 2000;Yim et al, 2000;Nam et al, 2016). Among the treated groups, Fe-EDTA resulted in slightly higher red coloration (CIE a* value) than Cu-EDTA and Fe-EDTA + Cu-EDTA.…”

Section: Resultssupporting

confidence: 90%

Defoliation and Fruit Coloration in ‘Fuji’/M.9 Apple Affected by Cu-EDTA and Fe-EDTA Foliar Spray

Lim¹,

Shin²,

Son³

et al. 2019

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The objective of this study was to determine whether two chelate compounds (Cu-EDTA and Fe-EDTA) applied as a foliar spray could effectively defoliate 'Fuji'/M.9 apple trees and improve fruit quality and fruit coloration. Foliar spray with these two chelate compounds at 30 days before harvest significantly defoliated fruit cluster leaves, which improved light interception of 'Fuji'/M.9 apple trees. However, Cu-EDTA non-selectively defoliated bourse shoot leaves and true leaves, which are involved in photosynthesis during the late period of fruit growth. Cu-EDTA markedly reduced fruit weight, soluble solids content, and fruit coloration compared to Fe-EDTA. Regarding Fe-EDTA concentration, 3% Fe-EDTA was more effective at enhancing fruit coloration but lowered fruit weight compared to 1% Fe-EDTA. Consequently, we found that 1% Fe-EDTA induced more selective defoliation of fruit cluster leaves than Cu-EDTA and was more effective in improving fruit quality and fruit coloration of 'Fuji' apple trees.

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Section: Resultssupporting

confidence: 90%