PHYSIOLOGICAL AND SENSORIAL ASPECTS OF PEACH FRUITS cv. Chimarrita DEPENDING ON THE SEASON AND MANAGEMENT OF GREEN PRUNING

Dotto, Marcelo; Pirola, Kelli; Wagner, Américo; Radaelli, Juliana Cristina; Antunes, Luis Corrêa; Citadin, Idémir

doi:10.37856/bja.v92i3.2975

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…In 2016, the number of fruits did not differ between trees that were not subjected to thinning and those that received metamitron; therefore, yield per tree was only affected in 2015. Since photosynthesis is controlled by environmental factors, such as temperature and luminosity (Dotto et al, 2017), this variation in the effects of metamitron on the number of fruit and yield in both crop years may be related to the low temperature and solar radiation registered in 2015. As mentioned before, metamitron acts on PSII by inhibiting electron transport (Basak, 2011;Stern, 2014), i.e., photosynthetic inefficiency decreases the production of carbohydrates that are needed for fruit fixation.…”

Section: Resultsmentioning

confidence: 99%

Carbohydrate content in branches and abscission of fruit of peach trees subjected to chemical thinning

Barreto

Farias

Menegatti

et al. 2021

Pesq. agropec. bras.

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The objective of this work was to evaluate the effect of chemical thinning with metamitron on fruit of the Maciel and Sensação peach (Prunus persica) tree cultivars, as well as to identify its relation to the carbohydrate content in their branches. The experimental design was randomized complete blocks, and the treatments were trees with no thinning, manual fruit thinning, and chemical thinning with 200 mg L-1 metamitron applied at 20, 40, and 60 days after full blooming. The evaluated variables were: abscission percentage, yield per plant, number of fruit, presence of lignin in fruit, and carbohydrate content in the branches. The carbohydrate content was evaluated in trees with and without chemical thinning seven days after the application of the product. The use of metamitron promotes fruit thinning in the ‘Maciel’ and ‘Sensação’ peach trees, with a decrease in the carbohydrate content in their branches. Metamitron application 20 and 40 days after full blooming favors fruit abscission in both studied cultivars.

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Section: Resultsmentioning

confidence: 99%

Carbohydrate content in branches and abscission of fruit of peach trees subjected to chemical thinning

Barreto

Farias

Menegatti

et al. 2021

Pesq. agropec. bras.

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“…'Reinette du Canada' apple trees pruned in the summer produced fruit with lower soluble solids (SS) and titratable acidity (TA) concentration at harvest and during refrigerated storage, in addition, to pruning influenced the mineral concentration of fruit (Guerra & Casquero, 2010). Although summer pruning may contribute to the production of redder fruit, it can compromise the production of photoassimilates and change the growth shoot/root ratio if performed incorrectly (Dotto et al, 2017). According to these authors, defining the best way and time to carry out this practice is of paramount importance.…”

Section: Introductionmentioning

confidence: 99%

The influence of the summer pruning on ‘Fuji’ apples storage under controlled atmosphere

Lugaresi,

Steffens,

Heinzen

et al. 2023

Acta Sci. Agron.

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This study aimed to evaluate the effect of the summer pruning time in ‘Fuji’ apple trees on the quality of fruit at harvest and after storage in controlled atmosphere with extremely low O2 (CA-ELO) (0.5 kPa O2). The treatments evaluated were summer pruning in December, January, and February, in addition to a control treatment (without summer pruning). The experiment was carried out in the 2018/2019 and 2019/2020 growing seasons. The fruit were evaluated at harvest and after eight months of CA-ELO (0.5 kPa O2 + <0.5 kPa CO2/1.5 ± 0.2°C/92 ± 2% RH) storage, at chamber opening, and after 7 days of shelf-life at 23 ± 3°C and 60 ± 5% RH. The quality of the fruit was evaluated through of soluble solids, flesh firmness, titratable acidity, fruit color, and physiological disorder incidence (sunburn and flesh browning), in addition to enzymatic activity and concentration of functional compounds. There was no significant effect of the summer pruning time on fruit flesh firmness, soluble solids, titratable acidity, and rot incidence after storage under CA-ELO plus 7 days of shelf life. Summer pruning in February resulted in fruit with higher peel red color development, which in general contains a higher concentration of functional compounds at harvest (total phenolic compounds and total antioxidant activity), and lower flesh browning incidence in ‘Fuji’ apples stored under CA-ELO. The nitrogen (N) concentration and nitrogen/calcium ratio (N/Ca) in the second growing season were lower in fruit from plants pruned in February, compared to no summer pruning or earlier pruning. The superoxide dismutase and peroxidase enzyme activity were lower in fruit from treatments with summer pruning in January and February, whereas the polyphenol oxidase enzyme activity was lower when summer pruning was conducted in February.

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Application time of chemical thinning with metamitron in ‘Sensação’ peach trees

et al. 2020

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Thinning is a cultural practice that leads to balance between fruit yield and quality. It is carried out in a short period of time and requires qualified workforce, whose shortage ends up increasing costs. This study aimed at evaluating the thinning effect of metamitron on peach trees at different periods of time after bloom. The experiment was carried out in a commercial orchard of 'Sensação' peach trees located in Morro Redondo, Rio Grande do Sul (RS) state, Brazil, in 2015-2016 crops. Treatments were the application of 200 mg L-1 metamitron, 20, 30, 40, 50 and 60 days after full bloom (DAFB), and manual thinning 40 DAFB. Fruit abscission, effective fructification, period of manual and chemical thinning, number of fruits and yield per plant, mean fruit mass and fruit caliber were evaluated. When metamitron was applied 40 DAFB, percentages of fruit abscission and fruit set, besides the number of fruits, were similar to the ones found when manual thinning was carried out. The intensity of the thinning effect of metamitron in peach trees depends on the application period.

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PHYSIOLOGICAL AND SENSORIAL ASPECTS OF PEACH FRUITS cv. Chimarrita DEPENDING ON THE SEASON AND MANAGEMENT OF GREEN PRUNING

Cited by 3 publications

References 8 publications

Carbohydrate content in branches and abscission of fruit of peach trees subjected to chemical thinning

Carbohydrate content in branches and abscission of fruit of peach trees subjected to chemical thinning

The influence of the summer pruning on ‘Fuji’ apples storage under controlled atmosphere

Application time of chemical thinning with metamitron in ‘Sensação’ peach trees

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