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Title: | AVG application regimes play an important role on pre-harvest drop and ripening of 'Jonagold' apples |
Authors: | Ozkan, Yakup Ozturk, Burhan Yildiz, Kenan Ordu Üniversitesi 0000-0002-0867-3942 0000-0003-3455-5146 |
Keywords: | Colour, ethylene, rmness, fruit removal force, starch degradation |
Issue Date: | 2015 |
Publisher: | UNIV ESTADUAL LONDRINACAXIA POSTAL 6001, LONDRINA, PARANA 86501-990, BRAZIL |
Abstract: | This study was carried out to investigate the effects of different AVG (aminoethoxyvinylglycine) treatments on pre-harvest fruit drop rates and ripening levels of 'Jonagold' apples. A total of 225 mg L-1 AVG dose was applied at once in a single application at different times or divided into doses and applied different times. Compared to control treatment, entire AVG treatments increased fruit removal force and significantly decreased the pre-harvest drop rates. AVG treatments applied at once (225 mg L-1) 8 or 4 weeks before the anticipated harvest time were found to be more effective than the divided treatments. AVG treatments inhibited ethylene biosynthesis and such an inhibition was more distinctive in single 225 mg L-1 treatments. AVG treatments decreased flesh softening, starch degradation rates and consequently retarded fruit ripening. The 225 mg L-1 AVG treatment applied 4 weeks before the harvest significantly increased L* value and hue angle both in the year 2010 and 2011. NAA (naphtaleneacetic acid) at 10 mg L-1 sprayed 4 and 2 weeks before anticipated harvest was found to be insignificant in control of pre-harvest fruit drops. NAA treatment decreased flesh firmness, and did not have any significant effects on ethylene biosynthesis. |
URI: | http://doi.org/10.5433/1679-0359.2015v36n6p3595 http://earsiv.odu.edu.tr:8080/xmlui/handle/11489/1343 |
Appears in Collections: | Bahçe Bitkileri Bölümü |
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