Effect of Preharvest Application of ProTone, Methionine and Oleic acid as Alternative Materials to Ethephon for Enhancing Berry Coloration and Quality of "Flame Seedless" Table Grapes

Attia, Said

doi:10.21608/ajas.1999.16654

Cited by 3 publications

(5 citation statements)

References 13 publications

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“…On the contrary, many studied mentioned that thiourea enhanced chlorophyll content. Meanwhile, foliar spray of methionine increased total chlorophyll contents of okra ( Zulqadar et al, 2015) and Attia (2018) on grapes. It could be refer to that thiourea and methionine could need more time to induce effect on leaf chlorophyll content and/or it thiourea and methionine degradation by plant after spraying direct and /or other factors make plant not ready to response to give effect on leaf chlorophyll content.…”

Section: Leaf Total Chlorophyll Contentmentioning

confidence: 99%

“…In addition, foliar spray of methionine increased the of flowers and number of fruits of okra ( Zulqadar et al, 2015) and Attia (2018) on grapes.…”

Section: Fruit Set Percentagementioning

confidence: 99%

“…Moreover, Brighenti et al (2017) mentioned that ethephon had positive effect on anthocyanin contents of fruit apple and Attia (2018) on berry "Flame Seedless" Table Grapes. Attia (2018) on grapes. Foliar ethephon, thiourea and methionine enhanced the endogenous ethylene concentration moreover, promote or inhibit growth and senescence processes depending on its concentration, as well as it stimulating the synthesis of anthocyanins (Li et al, 2017).…”

Section: Fruit Firmness (Kg/cm)mentioning

confidence: 99%

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Effect of Chemical Loosening agents on Harvesting Efficiency and Fruit Quality of Olive Trees

Salama

2023

Alexandria Science Exchange Journal

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A field experiment was carried out during 2017, 2018 and 2019 seasons on ten year old "Dolce" olive trees grown at private orchard, at Siwa oasis, Marsa Matrouh governorate, Egypt. The aim of this study is evaluating the effect of methionine, ethephon and thiourea as assistant treatments to hand vibration harvest and their effects on leaf (drop and total chlorophyll content) and fruit quality as well as their effect on the next flowering of "Dolce" olive trees. Trees were sprayed, two weeks prior to harvest date with one of the following solutions: (1) control (tap water), (2) methionine at 1000 or 2000 ppm, (3) ethephon at 2000 or 3000 ppm, (4) thiourea at 1000 or 2000 ppm. Control trees recorded the highest fruit detachment force, the highest percentage of hand-picked fruits and the least shed leaves per tree. Ethephon, thiourea and methionine treatments reduced fruit detachment force and supported hand vibration harvest, but increased leaf drop over control trees. All tested treatments gave the highest positive effect on fruit anthocyanin and carotene content as compared with the control. Moreover, perfect flowers and fruit set percentages in the following year responded positively to all treatments, meanwhile, ethephon treatment at 3000 ppm proved to be the most efficient treatments in this concern. Methionine succeeded in enhancing harvesting efficiency percentage and improved fruit color, while it resulted in the lowest effect on fruit removal force, hand-picked fruits percentage and total leaf drop compared to ethephon and thiourea.

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Section: Leaf Total Chlorophyll Contentmentioning

confidence: 99%

“…In addition, foliar spray of methionine increased the of flowers and number of fruits of okra ( Zulqadar et al, 2015) and Attia (2018) on grapes.…”

Section: Fruit Set Percentagementioning

confidence: 99%

Section: Fruit Firmness (Kg/cm)mentioning

confidence: 99%

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Effect of Chemical Loosening agents on Harvesting Efficiency and Fruit Quality of Olive Trees

Salama

2023

Alexandria Science Exchange Journal

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“…In juice of berries, total soluble solids (TSS) were determined according to hand refractometer, juice acidity as tartaric acid was determined according to AOAC, (1985) and skin berry anthocyanin content (mg/100g) was determined according to Fuleki and Francis (1968). To assess berry weight loss and berry shatter percentage after storage on room temperature (20± 2°C) for three days, another two bunches were used from each replication according to the methods mentioned by Attia, (2018). The experiment was arranged in a completely randomized block design (RCBD) and seven treatments were used (7 treatments with three replication).…”

Section: -Years-old "Kingmentioning

confidence: 99%

Enhancing Berry Quality and Coloration of King Ruby Grapes by Some Preharvest Treatments

Attia

2022

AJAS

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King ruby berry grape quality such as color and firmness were important for local and export custom. In this experiment, the results proved that all preharvest treatments especially lysophosphatidylethanolamine (LPE) decreased berry leakage as compared with control. The results also indicated that jasmonic acid, phenylalanine and LPE increased berry anthocyanin content as compared with control. In addition, berry-treated with Jasmonic acid decreased berry electrolyte leakage and berry acidity. On the other hand, increased berry anthocyanin content and TSS. Phenylalanine treatment enhanced berry chemical properties such as TSS and anthocyanin content. LPE treatment enhanced physical and chemical characteristics of king ruby berries such as berry size, weight, diameter, TSS and berry anthocyanin content. After three days on shelf, all preharvest treatments containing LPE decreased berry weight loss and shatter percentage. In conclusion, preharvest application of jasmonic acid plus phenylalanine and LPE at berry verasion enhanced berry color and physiochemical properties of "king ruby" grapes.

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“…Various studies have suggested that the exogenous application of abscisic acid (ABA) increases the anthocyanin content of the skins of table grape cultivars, without changing berry maturation and without causing excessive softening (Lee et al, 1997;Cantín et al, 2007;Peppi et al, 2006. Attia (2018) recommended that using the ABA (Protone) plus methionine and oleic acid at veraison stage as an alternative to Ethrel (ethephon) treatment to overcome some adverse effects of Ethrel such as increased berry shattering and berry weight loss, which reflects on berry appearance.…”

Section: Introductionmentioning

confidence: 99%

Improvingquality and Color of Flame Seedlessgrapes by Spraying (Abscisic, Ascorbic and Salicylic) Acids and Ethrel (Ethephon)

Elsharawy,

Hassan,

A. Nomier

et al. 2023

Zagazig Journal of Agricultural Research

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This investigation carried out throughout two successive seasons 2016 and 2017, on six years-old Flame seedless grapevines in a private vineyard located at Km 93, Cairo, Alexandria desert road. Vines grown in sandy soil under drip irrigation system are trellised with Spanish (Paron) system and trained with quadrilateral cordon. The experiment included 10 treatments as follow:T1-Control (sprayed with water only), T2-Ethrel (ethephon) at 300 ppm, T3-Ascorbic acid (AA) at 500 ppm, T4 -Salicylic acid (SA) at 100 ppm, T5-ABA (Protone10% abscisic acid) at 400 ppm, T6-AA at 500 ppm + Ethrel (Eth) at 300 ppm, T7-SA at 100 ppm+ Eth at 300 ppm, T8-Eth at 300 ppm + ABA at 400 ppm, T9-AA at 500 ppm+ ABA at 400 ppm and T10-SA at 100 ppm+ ABA at 400 ppm. The foliar spray was used two times in the treatments from T2 to T5 but used once for every substance in the treatments from T6 to T10. The results cleared significantly effect of all treatments on yield, bunch, berry physical and chemical characteristics. Spraying with ascorbic acid (AA) or salicylic acid (SA) recorded highest values of 100-berry weight (g), berry firmness, attachment, berry length and width (cm) without significant differences with ABA in both seasons. The treatments of Ethrel (Eth), ABA and Eth+ ABA had maximum TSS (%), while Ethrel or Eth+ ABA had highest TSS/acid ratio and anthocyanin (%) in berries and also these treatments had least values of total acidity (%) in the two seasons. Spraying with ascorbic acid (AA) or salicylic acid (SA) or AA+ ABA or SA+ ABA recorded uppermost yield (kg/ vine) and bunch weight (g), followed by spraying Ethrel (Eth) or (Eth+ ABA).

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Effect of Preharvest Application of ProTone, Methionine and Oleic acid as Alternative Materials to Ethephon for Enhancing Berry Coloration and Quality of "Flame Seedless" Table Grapes

Cited by 3 publications

References 13 publications

Effect of Chemical Loosening agents on Harvesting Efficiency and Fruit Quality of Olive Trees

Effect of Chemical Loosening agents on Harvesting Efficiency and Fruit Quality of Olive Trees

Enhancing Berry Quality and Coloration of King Ruby Grapes by Some Preharvest Treatments

Improvingquality and Color of Flame Seedlessgrapes by Spraying (Abscisic, Ascorbic and Salicylic) Acids and Ethrel (Ethephon)

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