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http://dx.doi.org/10.7235/hort.2014.13019

Photosynthesis, Shoot Growth and Fruit Quality in 'Fuji'/M.9 Mature Apple Trees in Response to Prohexadione-calcium Treatments  

Sagong, Dong-Hoon (Department of Horticulture, Daegu University)
Song, Yang-Yik (Apple Research Station, National Institute of Horticultural & Herbal Science, Rural Development Administration)
Park, Moo-Yong (Apple Research Station, National Institute of Horticultural & Herbal Science, Rural Development Administration)
Kweon, Hun-Joong (Apple Research Station, National Institute of Horticultural & Herbal Science, Rural Development Administration)
Kim, Mok-Jong (Namhae Sub-Station, National Institute of Horticultural & Herbal Science, Rural Development Administration)
Yoon, Tae-Myung (Department of Horticultural Science, Kyungpook National University)
Publication Information
Horticultural Science & Technology / v.32, no.6, 2014 , pp. 762-770 More about this Journal
Abstract
This study was conducted to elucidate the influence of prohexadione-calcium (Pro-Ca) application on shoot growth and fruit quality in 'Fuji'/M.9 mature apple trees. Pro-Ca was applied at concentrations ranging from 100 to $400mg{\cdot}L^{-1}$ one time at petal fall (PF; 5-10 cm terminal shoot growth) to the whole canopy of the tree, or at 100, 125, $150mg{\cdot}L^{-1}$ concentrations two times, at PF and then 4-8 weeks after PF. Pro-Ca treatment generally reduced mean shoot growth, with its effect being proportional to the application rate. Pro-Ca at $400mg{\cdot}L^{-1}$ significantly reduced the shoot growth by 15-22% compared to the control, while its effect was not significantly different from Pro-Ca $200mg{\cdot}L^{-1}$. Pro-Ca treatments induced higher occurrence of secondary growth compared to the control. Pro-Ca treatment increased the photosynthetic rate by 5-10% relative to the control, and also increased soluble solid concentration and fruit red color. However, fruit weight was significantly reduced by $400mg{\cdot}L^{-1}$ Pro-Ca, which was attributable to the greater secondary growth caused Pro-Ca $400mg{\cdot}L^{-1}$ treatment compared to the control and Pro-Ca $200mg{\cdot}L^{-1}$ treatment.
Keywords
fruit red color; fruit weight; Malus domestica Borkh.; secondary shoot growth; specific leaf weight;
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Times Cited By KSCI : 7  (Citation Analysis)
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