Influence of gibberellin inhibitors applied during flowering of nonirrigated 'Hass' avocado trees

Brogio, Bruna do Amaral; Silva, Simone Rodrigues da; Cantuarias-Avilés, Tatiana; Angolini, Sérgio Figueiredo; Baptista, Edypol Guilherme; Ribeiro, Rafael Vasconcelos

doi:10.1590/s0100-204x2018000800006

Cited by 7 publications

(7 citation statements)

References 11 publications

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“…When evaluating the results of fruit mass, regarding the PBZ dose factor, an adjustment to the quadratic regression model was observed, with a positive effect on the estimated dose of 1.02 g m -1 of the canopy and a maximum value of 7.07 g, with a decrease in this variable with higher PBZ doses (Figure 1). Brogio et al (2018), evaluating the effect of gibberellin inhibitors on 'Hass' avocado, observed that the PBZ dose of 1,750 mg L -1 , via foliar spraying, provided an increase of 20.3 g in fruit mass, corroborating the results found by Barman & Mishra (2018), who observed that the application of 3.2 mL ns Not significant; * significant at 5 % of probability (p < 0.05). Means with distinct letters in the column differ from each other by the F test.…”

Section: Resultssupporting

confidence: 85%

“…Physiological changes in plants induced by the action of PBZ may cause modifications in the physicochemical quality of fruits (Barman & Mishra 2018). In avocado (Persea americana), Brogio et al (2018) reported an increase of fruit mass and size; while, in 'Palmer' mango (Mangifera indica L.), Oliveira et al (2015) observed a reduction in the soluble solids content. Oliveira et al (2017), however, reported no effect of PBZ on the physical and chemical characteristics of 'Ubá' mango.…”

Section: Introductionmentioning

confidence: 99%

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Paclobutrazol in the flowering management affects the quality of Malpighia emarginata fruits

Sousa

Lobo

Carreiro

et al. 2020

Pesqui. Agropecu. Trop.

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Floral management using the growth regulator paclobutrazol may be an alternative for promoting the uniformity of flowering and fruiting in West Indian cherry (Malpighia emarginata D.C.) plants. However, the effects of its use on fruit quality are still unknown. This study aimed to evaluate the effect of paclobutrazol doses on the fruit quality of M. emarginata. The experimental design was randomized blocks, in a 2 x 5 factorial arrangement, with three replications and three plants per plot, with the studied factors consisting of two M. emarginata cultivars ('Junko' and 'Flor Branca') and five paclobutrazol doses (0, 0.4, 0.8, 1.2 and 1.6 g a.i. m-1 of canopy diameter). The following variables were evaluated: fruit mass, fruit transverse and longitudinal diameters, pH, soluble solids content, titratable acidity, soluble solids/titratable acidity ratio and vitamin C content. The use of paclobutrazol, to some extent, promoted the increase of fruit mass, longitudinal diameter and soluble solids contents. The 'Junko' cultivar presented a higher vitamin C content than that for 'Flor Branca', and the maximum vitamin C contents were obtained with the paclobutrazol doses of 0.64 and 0.81 g a.i. m-1, respectively for the 'Junko' and 'Flor Branca' cultivars. None of the studied factors promoted differences for pH and fruit acidity.

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Section: Resultssupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Paclobutrazol in the flowering management affects the quality of Malpighia emarginata fruits

Sousa

Lobo

Carreiro

et al. 2020

Pesqui. Agropecu. Trop.

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“…1) [23,38,39]. As a result, it decreases vigour and promotes floral induction and development [9,10,15].…”

Section: Strigol Strigyl Acetate and Sorgolactonementioning

confidence: 99%

“…In another experiment, but with the variety "Namdokmai-sitong", the application was carried out 15 and 45 days after pruning with doses of 500, 1000, 1500 and 2000 mg L -1 , which resulted in a decrease in vegetative growth and an improvement in the number of flowers and buds [10]. On the other hand, in Brazil, Do Amaral Brogio et al [15] carried out foliar applications of PBZ (1750 mg L -1 ) on avocado (Persea americana L.) "Hass" and found that it modified the shape of the fruit and caused a significant increase in fruit size.…”

Section: Use Of Pbz In Fruit Treesmentioning

confidence: 99%

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Paclobutrazol and Its Use in Fruit Production: A Review

Orozco-Mel閚dez¹,

Hern醤dez-Rodr韌uez²,

Cruz-羖varez³

et al. 2022

Phyton

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There are documentary records referring to paclobutrazol (PBZ) as a growth bioregulator that inhibits the gibberellin synthesis and its application increases yields in fruit and vegetable crop productions. Its agronomic management includes it as an emerging technology to reduce vigour, promote flower induction and flower development in fruit trees with increased economic returns. Its use is banned in some countries because of concerns about residues that can cause harmful effects on the environment. Therefore, the aim of this article was to collect, analyse and summarise relevant information on the use of PBZ in fruit tree production and its possible risks to the environment. The results obtained indicated that the application of PBZ can be effective in solving some problems related to flowering if it is applied in the right amount and at the right time. However, it is necessary to elucidate the physiological processes with which it is associated and its response to be taken into account to increase yield. PBZ is currently used in fruit trees such as mango, lime, apple and guava, increasing their productivity. However, some studies have shown its residual effect on the environment. Therefore, PBZ is a viable strategy, because it presents a series of advantages in the production of fruit trees. However, it is vital to generate protocols that seek its regulation with a rational and sustainable approach.

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Does the application of growth bioregulators improve the foliar concentration of nutrients, non-structural carbohydrates and yield in pecan?

et al. 2021

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Carya illinoinensis (Wangenh.) K. Koch. is a deciduous fruit species with high economic impact and nutritional value that exhibits alternate bearing behavior. In this study, the concentration of foliar nutrients, non-structural carbohydrates and yield were evaluated in cultivar Western Schley pecan in response to the foliar application of gibberellic acid (50 mg L-1 GA3), prohexadione calcium (500 mg L-1 PCa) and thidiazuron (10 mg L-1 TDZ).The statistical analysis reveals that between agricultural cycles, the treatments showed no variation in the foliar concentration of nitrogen total (N-total), potassium (K), calcium (Ca), magnesium (Mg), iron (Fe), copper (Cu), manganese (Mn) and non-structural carbohydrates (fructose, glucose, sucrose and starch). However, the application of PCa showed no significant effect on the concentration of phosphorus (P) (1.5 and 1.9 g kg-1). On the other hand, the concentration of zinc (Zn) (27.0-60.1 mg kg-1) showed a significant difference between years, with no effect due to the application of growth bioregulators. The trees treated with GA3 minimized alternate bearing by presenting similar values (12.4 and 15.3 kg tree-1) of yield. Likewise, the applied treatments did not affect the nut weight per kilogram (kg) (5.5-6.8 g) and kernel percentage (56.5-60.8). These data provide a new perspective on the complex nature of alternate bearing production in cultivar Western Schley pecan and are interpreted to indicate that alternate production could be regulated by carbohydrate reserve, nutrient concentration, and gibberellins.

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Influence of gibberellin inhibitors applied during flowering of nonirrigated 'Hass' avocado trees

Cited by 7 publications

References 11 publications

Paclobutrazol in the flowering management affects the quality of Malpighia emarginata fruits

Paclobutrazol in the flowering management affects the quality of Malpighia emarginata fruits

Paclobutrazol and Its Use in Fruit Production: A Review

Does the application of growth bioregulators improve the foliar concentration of nutrients, non-structural carbohydrates and yield in pecan?

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