The Effects of Pre-Harvest Naphthalene Acetic Acid (NAA) Treatments on Fruit Quality Attributes of Braeburn Apples during Cold Storage

Öztürk, Burhan; Karakaya, Orhan; Özkan, Yakup; Yıldız, Kenan; Karakaya, Medeni; Güler, Saadet Koç

doi:10.9734/jeai/2019/v33i630159

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…Additionally, the addition of AVG or 1-MCP also delayed the loss of fruit firmness, thus overcoming the adverse effect of fruit softening caused by abiotic stresses [25,34]. The lower rates of ethylene generation and respiration, the reduced activity of ACC oxidase, and the greater flesh firmness observed in fruits sprayed with AVG or 1-MCP may all be contributing factors [42], in addition to their slowing of the impacts of ethylene-induced enzyme activity, such as polygalactrnase and pectine formation [77]. Compared with those that underwent the control treatment, the apples that received preharvest applications of AVG or 1-MCP had greater levels of flesh firmness and texture characteristics.…”

Section: Discussionmentioning

confidence: 98%

Enhancing Anna Apples’ Productivity, Physico-Chemical Properties, and Marketability Using Sprays of Naphthalene Acetic Acid and Inhibitors of Ethylene for Alleviating Abiotic Stresses

et al. 2023

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In order to improve the resistance of apples to stresses (abiotic stresses) during hot and dry summers to enhance their productivity and marketability, Anna apple trees were treated with aminoethoxyvinylglycine (AVG), 1-methlcyclopropene (1-MCP), and naphthalene acetic acid (NAA), alone, or in combination, in two successive seasons. All treatments significantly increased the yield per tree, the average fruit volume, fruit diameter, and fruit weight compared to the control (growing under hot and dry summers without any treatments). All treatments significantly reduced the apple size, total soluble solid (TSS) content, anthocyanin content, carotenoid content, total sugar solids, and sugar percentage, and they led to fruit softening, loss of fruit weight, firmness, breakdown percentage, as well as a decreased polyphenol oxidase and peroxidase activity at one-week post-harvest (except for 20-ppm NAA) in comparison with the control. Trees treated with 320-ppm 1-MCP + 250-ppm AVG exhibited maximum yield per tree, fruit firmness, and no-reducing sugars or starch. On the other hand, the 20-ppm NAA produced the maximum TSS content, total sugars, with a reduced sugar percentage, carotenoid and anthocyanin fruit content, and (TSS)/acidity ratio. The application of 320-ppm 1-MCP + 250-ppm AVG effectively delayed the harvest for 14 days compared to the control. Our results show that the sprays of NAA and inhibitors of ethylene had a significant effect on the productivity and marketability of Anna apples under abiotic stresses.

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Section: Discussionmentioning

confidence: 98%

Enhancing Anna Apples’ Productivity, Physico-Chemical Properties, and Marketability Using Sprays of Naphthalene Acetic Acid and Inhibitors of Ethylene for Alleviating Abiotic Stresses

et al. 2023

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Use of alpha-naphthylacetic acid in ovary thinning and preharvest fruit drop reduction in apple trees

Кузин

Nazarov

Шмакова

et al. 2021

Sadovodstvo i vinogradarstvo

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Chemical thinning of apple ovaries in intensive orchards is highly relevant. This farming practice reduces manual labour, decreases the fructification interval and improves apple quality. Growth regulators, including alpha-aphthylacetic acid, also reduce preharvest fruit drop allowing for an optimal harvest capacity. The research aimed to study the impact of different alpha-naphthylacetic acid application rates on ovary thinning and preharvest fruit drop. Assays were conducted in 2019—2020 in a leached-chernozem experimental apple orchard of the Michurin Federal Research Centre in Tambov Region. Assay 1 studied the treatment impact on apple tree thinning at rates 100, 200, 300 and 400 ml/ha in 8—12 mm fruits, assay 2 (treatment 2 weeks prior to expected harvest) — on reducing preharvest apple drop at rates 200, 300 and 400 ml/ha. The treatments significantly reduced the number of ovaries in the Zhigulevskoe/62-396 cultivar and increased mean apple fruit weight. Such increase was an important yield-rising factor in the 300 and 400 ml/ha treatments. Alpha-naphthylacetic acid treatments in 8—12 mm fruits had a significant lowering impact on total leaf nitrogen content. The treatments also induced a significant reduction in preharvest apple fruit drop, with the best effect at rate 300 ml/ha. No explicit impact of alpha-naphthylacetic acid on fructification interval was observed in the study period.

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Ethylene and its crosstalk with hormonal pathways in fruit ripening: mechanisms, modulation, and commercial exploitation

Tipu,

Sherif

2024

Front. Plant Sci.

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Ethylene is an important phytohormone that orchestrates a multitude of physiological and biochemical processes regulating fruit ripening, from early maturation to post-harvest. This review offers a comprehensive analysis of ethylene’s multifaceted roles in climacteric fruit ripening, characterized by a pronounced increase in ethylene production and respiration rates. It explores potential genetic and molecular mechanisms underlying ethylene’s action, focusing on key transcription factors, biosynthetic pathway genes, and signal transduction elements crucial for the expression of ripening-related genes. The varied sensitivity and dependency of ripening traits on ethylene are elucidated through studies employing genetic mutations and ethylene inhibitors such as AVG and 1-MCP. Additionally, the modulation of ripening traits by ethylene is influenced by its interaction with other phytohormones, including auxins, abscisic acid, gibberellins, jasmonates, brassinosteroids, and salicylic acid. Pre-harvest fruit drop is intricately linked to ethylene, which triggers enzyme activity in the abscission zone, leading to cell wall degradation and fruit detachment. This review also highlights the potential for applying ethylene-related knowledge in commercial contexts to enhance fruit quality, control pre-harvest drop, and extend shelf life. Future research directions are proposed, advocating for the integration of physiological, genetic, biochemical, and transcriptional insights to further elucidate ethylene’s role in fruit ripening and its interaction with other hormonal pathways.

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The Effects of Pre-Harvest Naphthalene Acetic Acid (NAA) Treatments on Fruit Quality Attributes of Braeburn Apples during Cold Storage

Cited by 3 publications

References 7 publications

Enhancing Anna Apples’ Productivity, Physico-Chemical Properties, and Marketability Using Sprays of Naphthalene Acetic Acid and Inhibitors of Ethylene for Alleviating Abiotic Stresses

Enhancing Anna Apples’ Productivity, Physico-Chemical Properties, and Marketability Using Sprays of Naphthalene Acetic Acid and Inhibitors of Ethylene for Alleviating Abiotic Stresses

Use of alpha-naphthylacetic acid in ovary thinning and preharvest fruit drop reduction in apple trees

Ethylene and its crosstalk with hormonal pathways in fruit ripening: mechanisms, modulation, and commercial exploitation

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