Aminoethoxyvinylglycine’ nin ‘Monroe’ Şeftali Çeşidinde Hasat Zamanı ve Meyve Kalitesi Üzerine Etkileri

Bu çalışmanın amacı ‘Monroe’ şeftali çeşidinde hasat tarihini geciktirmek ve meyvelerin kalitesini arttırmaktır. Bu amaçla, % 15 aminoethoxyvinylglycine (AVG) içeren ReTain bitki büyüme düzenleyicisi şeftali meyvelerine uygulanmıştır. AVG’ nin 3 farklı dozu (0, 100, 150, 200 mg L-1), tahmini hasat zamanından 7, 21 ve 30 gün önce şeftali meyvelerine sprey şeklinde uygulanmıştır. Meyvelerde bazı kalite özellikleri (meyve ağırlığı (g), meyve eti sertliği (N), SCKM (%), titre edilebilir asitlik (%), meyve rengi (L*, a*, b*), şeker miktarı), hasat tarihinin gecikmesi, meyvelerin etilen üretimi (µL kg-1 h-1) ve solunum hızları (mL.CO2 kg-1 h-1) her bir uygulama için ayrı ayrı incelenmiştir. AVG uygulamaları ile meyve olgunluğu kontrol grubuna göre 4-6 gün gecikmiş ve kademeli yapılan hasat, normal hasat periyoduna göre 6-7 gün önce tamamlanmıştır. Tüm uygulamalar ‘Monroe’ şeftalisinde meyve büyüklüğünü ve ağırlığını arttırmıştır. AVG uygulanan meyvelerin sertliği kontrol meyvelerine göre daha serttir. AVG uygulamaları ile meyvelerde etilen üretimi ve solunum hızı azalmıştır.

Anahtar Kelimeler:

AVG, Meyve kalitesi, Hasat tarihi, ‘Monroe’, Şeftali, Olgunluk

Effects of Aminoethoxyvinylglycine on Harvest Time and Fruit Quality of ‘Monroe’ Peaches

This study was conducted to prolong the harvest date and enhance the fruit quality of ‘Monroe’ peaches. For this purpose, ReTain containing 15% aminoethoxyvinylglycine (AVG) was applied to the peach fruits. AVG at concentrations of 0, 100, 150 and 200 mg l -1 was sprayed on the peaches 7, 21 and 30 days before commercial harvest. Some fruit quality parameters [fruit weight (g), fruit flesh firmness (N), soluble solids content (SSC, %), titratable acidity (TA, %), fruit colour (L*, a*, b*), sugar content, delay in harvest, ethylene production (µl kg-1 h-1) and respiration rate (ml CO2 kg-1 h-1)] were measured for each treatment. Fruit maturity was delayed about 4-6 days more in AVG-applied fruits than in the control group. A sequential harvest was completed 6-7 days before the normal harvest time. Application of AVG increased the fruit size and fruit weight of ‘Monroe’ peach. AVGsprayed fruits were firmer than the fruits of control group. AVG applications also decreased ethylene production and the respiration rate of fruits. As a results, application AVG of 100 or 200 mg l -1 concentrations 30 days before commercial harvest for 'Monroe' peach varieties can be recommended.

Keywords:

AVG, Fruit quality, Harvest date, ‘Monroe cv.’, Peach, Ripening,

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