Organic acids allied with paclobutrazol modify mango tree ‘Keitt’ flowering

Silva, Luan dos Santos; Cavalcante, Ítalo Herbert Lucena; Cunha, Jenilton Gomes da; Lobo, Jackson Teixeira; Carreiro, Daniel de Almeida; Neto, Vespasiano Borges de Paiva

doi:10.1590/0100-29452022003

Cited by 4 publications

(1 citation statement)

References 24 publications

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“…For Mango culture the PBZ is a regulator widely used in the flowering management (CAVALCANTE et al, 2020;SILVA et al, 2022). Currently, one of our research lines is to study the growth regulators in the seedlings species spread of the genus Passiflora in order to improve the quality and to induce resistance mechanisms to the main biotic and abiotic stresses (TEIXEIRA et al, 2019;TEIXEIRA et al, 2021;TEIXEIRA et al, 2023).…”

Section: Discussionmentioning

confidence: 99%

Paclobutrazol as a strategy to induce reproductive precocity in sour passion fruit

et al. 2023

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The adoption of growth regulators can be an alternative method to modulate the quality of the propagation material and obtain reproductive precocity. The objective was to evaluate if a gibberellin biosynthesis inhibitor affects the morphophysiological, biochemical and anatomical parameters of sour passion fruit seedlings and if such alterations affect the reproductive period. Two trials were conducted. In trial I, 40 days after emergence, the seedlings were immersed up to the substrate level in paclobutrazol (PBZ) solutions at concentrations of: 0, 40, 80, 120 and 160 mg L-1. At 45 days after the application of PBZ - DAA, the morphophysiology, biochemistry and anatomy were evaluated. Trail II was conducted in pots, using seedlings from trail I with 45 DAA of PBZ. At 200 days after transplanting, accumulation of shoots and roots fresh and dry mass (g), flowering speed index, total number of reproductive organs and SPAD index were evaluated. In seedlings, restriction of shoot growth induced by PBZ was associated with root increment, seedling quality, photosynthetic pigments and optimization of gas exchange. A shorter period of transition from the juvenile – vegetative phase to reproductive is observed when the seedlings were submitted to PBZ concentrations.

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Section: Discussionmentioning

confidence: 99%

Paclobutrazol as a strategy to induce reproductive precocity in sour passion fruit

et al. 2023

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Biostimulants on the occurrence of stenoespermocarpy in ‘Palmer’ mango

Venancio,

Silva,

Paiva Neto

et al. 2024

Rev. bras. eng. agríc. ambient.

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Stenospermocarpy in mango trees is associated with hormonal regulation and boron fertilization. However, the mode of action of plant growth regulators and boron in mango trees of the Palmer cultivar affected by this physiological disorder needs to be elucidated. In this scenario, this study aimed to evaluate the association of plant growth regulators (auxin, cytokinin, and gibberellin) and boron with the incidence of stenospermocarpic fruits in ‘Palmer’ mango. Two experiments were conducted in two consecutive crop years (2018 and 2019) in a commercial orchard. The experiment was set up in a randomized block design, with six treatments and four replicates. The treatments consisted of: T1 = water application (control); T2 = gibberellin (25 ppm, GA3); T3 = auxin (25 ppm, naphthaleneacetic acid); T4 = cytokinin (25 ppm, 6-BA); T5 = boron (2 ppm); and T6 = boron (2 ppm) + gibberellin (25 ppm). The application of gibberellic acid during the flowering phase resulted in higher mean values for the number of stenospermocarpic fruits. The cytokinin treatment reduced the incidence of stenospermocarpic fruits and led to higher mean values for the number of productive branches. Boron, auxin, and the combination of gibberellin and boron did not reduce the stenospermocarpy indices. Hormonal balance plays a crucial role in the manifestation of stenospermocarpic fruits, with gibberellin being associated with the expression of this disorder, while cytokinin exerts an antagonistic effect. The application of boron and auxin did not have a predominant effect on the increase or reduction of stenospermy.

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Rootstock affects phytotechnical attributes, gas exchange, and carbohydrate accumulation in mango scion

Santos,

Gomes,

Silva

et al. 2024

Folia Horticulturae

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The market demand for grafted mango seedlings is increasing because they provide uniformity and precocity for orchards and gain in productive performance. However, studies on suitable rootstocks for mango seedling production of the main mango cultivars of economic interest in the Sao Francisco Valley, Brazil, are incipient. In this context, the objective of the present study was to evaluate growth, gas exchange, and carbohydrate accumulation in the 'Palmer', 'Tommy Atkins', 'Kent', and 'Keitt' mango scions grafted onto polyembryonic rootstocks ('Capucho', 'Coquinho', and 'Espada'). The experiment was carried out under nursery conditions, with 50% shading. A randomized block experimental design was used, in a 3 × 4 factorial arrangement, consisting of three mango rootstocks ('Espada', 'Capucho', and 'Coquinho') and four mango scion cultivars ('Palmer', 'Keitt', 'Kent', and 'Tommy Atkins'), with five replications and five plants per plot. Graft success was evaluated 28 days after grafting (DAG) to determine the effects of the rootstocks on each scion. Growth, photosynthetic parameters, and total soluble carbohydrate (TSC) and starch content were evaluated 227 DAG. The rootstocks used affected the growth, photosynthetic pigments, contents of TSC and starch, and gas exchange of the mango scions. The higher graft success percentages were found for the cultivars 'Keitt', 'Palmer', and 'Kent' grafted on 'Espada' rootstocks. The cultivar 'Tommy Atkins' showed the highest graft success percentages when grafted on 'Espada' and 'Capucho' rootstocks. 'Capucho' rootstocks showed higher performance for most of the analysed variables, mainly when using 'Palmer' and 'Tommy Atkins' cultivars as scions.

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Organic acids allied with paclobutrazol modify mango tree ‘Keitt’ flowering

Cited by 4 publications

References 24 publications

Paclobutrazol as a strategy to induce reproductive precocity in sour passion fruit

Paclobutrazol as a strategy to induce reproductive precocity in sour passion fruit

Biostimulants on the occurrence of stenoespermocarpy in ‘Palmer’ mango

Rootstock affects phytotechnical attributes, gas exchange, and carbohydrate accumulation in mango scion

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