Effects of Aminoethoxyvinylglycine (AVG) on Preharvest Fruit Drop and Maturity of ‘Delicious’ Apples

Byers, Ross E.

doi:10.1300/j072v02n01_05

Cited by 41 publications

(55 citation statements)

References 15 publications

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“…Similar to previous researches carried out with different apple species (BYERS, 1997;GREENE, 2005;YUAN;CARBAUGH, 2007), AVG in present study was found to be effective in prevention of pre-harvest drops of 'Jonagold' apple. Although all AVG treatments significantly reduced the drop rates compared to control, the treatment of 225 mg L -1 AVG applied at once 8 or 4 weeks before the anticipated harvest date was found to be more effective in drop prevention than the other treatments.…”

Section: Discussionsupporting

confidence: 90%

“…Becoming more distinctive in AVG1 and AVG3 treatments, in general all AVG treatments increased flesh firmness and slowed down the conversion of starch into sugar. Similar results were observed by various researchers for different apple species (BYERS, 1997;GREENE, 2002;WARGO et al, 2004;YILDIZ et al, 2012).…”

Section: Discussionsupporting

confidence: 90%

“…Beside the synthetic auxin NAA (naphthaleneacetic acid) and 2, 4, 5-TP (2, 4, 5-trichlorophenoxyacetic acid), daminozide (Alar) is also commonly used to prevent fruit drops. Although some researchers reported significant effects of NAA in prevention of pre-harvest drops (MARINI et al, 1993;CURRY, 2006), others indicated that desired outcomes were not always achieved depending on species and climate factors (GREENE et al, 1987;BYERS, 1997;YILDIZ et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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AVG application regimes play an important role on pre-harvest drop and ripening of ‘Jonagold’ apples

2015

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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. Key words: Colour, ethylene, firmness, fruit removal force, starch degradation ResumoO presente estudo foi realizado para investigar os efeitos de diferentes tratamentos AVG (aminoetoxivinilglicina) sobre as taxas de queda de frutos antes da colheita e níveis de amadurecimento de maçãs 'Jonagold'. Foi aplicada uma dose AVG total de 225 mg L -1 numa só vez numa única aplicação em momentos diferentes ou dividida em doses aplicadas e tempos diferentes. Em comparação ao tratamento controle, as aplicações de AVG aumentaram a força de remoção dos frutos e reduziram significativamente as taxas de queda na pré-colheita. A aplicação de AVG de uma só vez (225 mg L -1 ) ou 4 a 8 semanas antes da época da colheita mostrou-se mais eficaz do que as aplicações efetuadas em doses. O tratamento com AVG inibe a biossíntese de etileno, sendo que esta inibição se verificou mais significativa em tratamentos individuais de 225 mg L -1 . O tratamento com AVG diminuiu o amolecimento da polpa, as taxas de degradação do amido e consequentemente retardou o amadurecimento dos frutos. O tratamento com doses de 225 mg L -1 de AVG aplicadas quatro semanas antes da colheita aumentou significativamente o valor L * e o ângulo de cor, tanto no ano de 2010 como de 2011. A pulverização de NAA (ácido naftaleno acético) a 10 mg L -1 2 a 4 semanas antes da colheita foi considerada insignificante no controle da queda de frutos na pré-colheita. O tratamento com NAA diminuiu a firmeza da polpa, e não tem quaisquer efeitos significativos sobre a síntese de etileno. Palavras-chave: Cor, etileno, firmeza, força de remoção dos frutos, degradação do amido 1 Assist. Prof. Dr.,

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Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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AVG application regimes play an important role on pre-harvest drop and ripening of ‘Jonagold’ apples

2015

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“…Amarante et al (2002) reported that as AVG treated, there were increases in flesh firmness, skin firmness, and fruit size value. Byers (1997) reported that AVG increased flesh firmness of fruit, especially if they were harvested after the optimal harvest date. Yuan and Li (2008) reported that flesh firmness of apple fruit was 75.2 N with the AVG application (125 mgL -1 ).…”

Section: Discussionmentioning

confidence: 99%

Effect of aminoethoxyvinylglycine on biochemical, physicomechanical and colour properties of cv. Braeburn apples

et al. 2013

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The effect of preharvest AVG (aminoethoxyvinylglycine) treatments on the biochemical, physicomechanical properties and colour characteristics of cv. Braeburn apples were determined. AVG was applied in four different doses (0, 100, 300 and 500 mgL -1 AVG) 4 weeks before the estimated harvest date. While the lowest values of total soluble solids content and pH were obtained from 500 mgL -1 AVG treatment, the highest values were obtained from control. The titratable acidity was higher in 500 mgL -1 AVG treatment than those of the 100 and 300 mgL -1 AVG treatments. The highest total phenolic and antioxidant activity of both flesh and skin apple was obtained from control, whereas lowest value was obtained from 500 mgL -1 AVG treatment. With increasing doses of AVG, the total monomeric anthocyanin was reduced. The geometric means, fruit diameter, fruit mass, fruit removal force, flesh and skin firmnesses increased with increasing doses of AVG. The hue angle values of flesh and skin fruit were lower in control. Key words: Malus domestica Borkh, colour, FRAP, phenolic compounds ResumoForam determinados os efeitos do tratamento em pré-colheita com aminoetoxivinilglicina (AVG) nas propriedades bioquímicas, físico-mecânicas e características da cor da maçã 'Braeburn'. AVG foi aplicado quatro semanas antes da data estimada de colheita, em quatro doses (0, 100, 300 e 500 mgL -1 ). Enquanto os menores valores de sólidos solúveis totais e pH foram obtidos no tratamento com 500 mgL -1 AVG, os maiores valores foram obtidos no tratamento com 0 mgL -1 AVG. A acidez titulável foi maior no tratamento com 500 mgL -1 AVG do que nos tratamentos 100 e 300 mgL -1 . A maior atividade de fenólicos totais e antioxidantes na polpa e na casca da maçã foi obtida no tratamento com 0 mgL -1 AVG, enquanto que o menor valor foi obtido no tratamento com 500 mgL -1 AVG. Com o aumento das doses de AVG, a antocianina monomérica total foi reduzida. As médias geométricas diâmetro do fruto, massa do fruto, força de remoção de frutas, polpa e casca aumentaram com o aumento das doses de AVG. Os valores do ângulo da matriz de polpa e casca da fruta foram menores no tratamento com 0 mgL -1 AVG.

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“…NAA uygulanmasından sonra hasat yaklaşık olarak 10-14 gün geciktirilmektedir (Schupp ve Greene, 2004). Buna karşılık diğer sentetik oksinlerde olduğu gibi NAA'nın da elmada olgunlaşmayı ve yumuşamayı hızlandırdığı ve hasat sonrası ömrün kısalmasına neden olduğu ve dökümü kontrol etmede yetersiz kaldığı tespit edilmiştir (Greene ve ark., 1987;Byers, 1997). AVG, 1970'li yıların başında keşfedilen ve doğal olarak meydana gelen bir etilen engelleyicisidir (Greene, 2002).…”

Section: Introductionunclassified

Red Chief Elma Çeşi̇di̇nde, Ami̇noethoxyvi̇nylglyci̇ne’ni̇n (Avg) Ve Naftalen Aseti̇k Asi̇t’i̇n (Naa) Hasat Önü Döküm Ve Meyve Kali̇tesi̇ Üzeri̇ne Etki̇si̇

Öztürk¹,

Özkan²,

Yıldız³

et al. 2012

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Bu çalışma Tokat ekolojik koşullarında Red Chief elma çeşidinin (Malus domestica Borkh.) hasat önü dökümünü azaltmak ve meyve kalitesini artırmak amacıyla yürütülmüştür. Bu amaçla 150, 300, 600 mg L -1 aminoethoxyvinylglycine ve 20 mg L -1 naftalen asetik asit, tahmini hasat tarihinden 4 hafta önce deneme ağaçlarına püskürtülmüştür. Çalışmada kümülatif döküm yüzdesi (%), kopma direnci (N), nişasta indeksi, meyve rengi (L*, C*, h°), meyve ağırlığı (g), suda çözünebilir kurumadde miktarı [SÇKM, (%)], pH, titre edilebilir asitlik (g.malik asit 100 -1 ) ve meyve eti sertliği (N) ölçümleri yapılmıştır. Tahmini hasat tarihinde AVG'nin 300 ve 600 mg L -1 dozları dökümü azaltmada kontrol ve NAA uygulamasından önemli düzeyde (P<0.05) farklı bulunmuştur. Kopma direnci, AVG'nin artan dozları ile artmıştır. Tahmini hasatta ve 15 Eylül'de, nişasta indeksi bakımından uygulamalar arasında fark tespit edilememiştir. Tahmini hasat tarihinde AVG'nin artan dozları ile meyve ağırlığı doğrusal olarak artmıştır. Tahmini hasat tarihinde, AVG ve NAA meyvenin SÇKM'sini pozitif yönde etkilemiştir. Genel olarak pH miktarı tahmini hasada doğru azalış göstermiştir. Tahmini hasatta, titre edilebilir asitlik değeri bakımından hem AVG hem de NAA kontrol ile benzer bulunmuştur. Tahmini hasada doğru et sertliğinde doğrusal bir azalış tespit edilmiş, ancak AVG'nin artan dozları et sertliğini pozitif yönde etkilemiştir.

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Effects of Aminoethoxyvinylglycine (AVG) on Preharvest Fruit Drop and Maturity of ‘Delicious’ Apples

Cited by 41 publications

References 15 publications

AVG application regimes play an important role on pre-harvest drop and ripening of ‘Jonagold’ apples

AVG application regimes play an important role on pre-harvest drop and ripening of ‘Jonagold’ apples

Effect of aminoethoxyvinylglycine on biochemical, physicomechanical and colour properties of cv. Braeburn apples

Red Chief Elma Çeşi̇di̇nde, Ami̇noethoxyvi̇nylglyci̇ne’ni̇n (Avg) Ve Naftalen Aseti̇k Asi̇t’i̇n (Naa) Hasat Önü Döküm Ve Meyve Kali̇tesi̇ Üzeri̇ne Etki̇si̇

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