Impact of fulvic acid and free amino acids on paclobutrazol absorption by ‘Keitt’ mango

Silva, Luan dos Santos; Silva, Paula Tereza de Souza e; Cavalcante, Ítalo Herbert Lucena

doi:10.4136/ambi-agua.2519

Cited by 5 publications

(4 citation statements)

References 23 publications

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“…Furthermore, the application of PBZ in conventional agriculture may be carried out by soil moisture or distributed to the canopy projection via fertigation system. The latter is more widespread and efficient than foliar application, especially after tree pruning pointers, that is, after the second flow growth rate (Oliveira 2020, Silva et al 2020c), because PBZ is mainly transported via xylem. Currently, most researches seek to improve the efficiency of PBZ, since its absorption mechanism presents difficulties due to low water solubility and low mobility in the soil, which are reversibly linked to the vascular system of both the plant and soil (Silva et al 2020c).…”

Section: Conventional Management Of Mango Flowering Inductionmentioning

confidence: 99%

“…In 'Keitt' mangoes, the use of fulvic acids, free amino acids or their joint application improve the absorption of PBZ by the plant, potentiating the growth inhibition and providing less accumulation of soil residues (Silva et al 2020c). The use of fulvic acids and amino acids may increase the PBZ absorption rate, as they have the ability to form complexes with nutrients and other molecules, facilitating the entry into the plasma membrane by active transport (Castro & Carvalho 2014).…”

Section: Conventional Management Of Mango Flowering Inductionmentioning

confidence: 99%

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Flowering induction in mango tree: updates, perspectives and options for organic agriculture

Prates

Züge

Leonel

et al. 2021

Pesqui. Agropecu. Trop.

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The artificial flowering induction in mango tree is the most important crop management in mango orchards and requires greater attention from growers. The management involves three steps: stoppage of plant growth, branch maturation and flowering induction with nitrates. The first stage starts with the application of paclobutrazol to the soil. However, problems with the use of excessive concentrations are common and lead to the accumulation of residues in the soil. In addition, the use of paclobutrazol is not allowed in organic agriculture. Therefore, this review article aimed to compile information about the updates and efforts to solve these problems in conventional mango crops, as well as identify alternatives for its organic management. In conventional orchards, the application of fulvic acids in association with paclobutrazol, as an alternative to the single use of paclobutrazol, was identified as a way to improve the absorption of the product by plants and, consequently, reduce the concentrations and residues in the soil. Researches involving pruning, girdling, fertilization and irrigation should be developed as an alternative to the use of paclobutrazol for the organic crop system of mango cultivars in tropical and subtropical regions.

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Section: Conventional Management Of Mango Flowering Inductionmentioning

confidence: 99%

Section: Conventional Management Of Mango Flowering Inductionmentioning

confidence: 99%

Flowering induction in mango tree: updates, perspectives and options for organic agriculture

Prates

Züge

Leonel

et al. 2021

Pesqui. Agropecu. Trop.

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show abstract

“…Another study was reported by Silva et al (2020) regarding the effect of FA application on mango in Sao Francisco Valley in the semi-arid zone of Brazil in combination with the application of paclobutrazol (PBZ), a plant growth regulator commonly used in mango production systems in semi-arid conditions to inhibit gibberellin biosynthesis and promote a better flowering uniformity. They found that the use of FA, free amino acids, or both affected PBZ absorption by local variety mango.…”

Section: Improvement Of Plantation Crop Performances By Famentioning

confidence: 99%

Fulvic acid – a small but powerful natural substance

Goenadi¹

2021

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Humic substances are defined as the result of the decomposition of any organic matter, and they consist mainly of humin, humic, and fulvic acids. Compared to humin, humic acids and fulvic acid (FA) are the most explored compounds. However, FAs are less studied than humic acids because of the usually small residual quantities. Considering that its potential for bioactivity is stronger than that of humic acids, the current review was performed to evaluate the effectiveness of FA application for crops and soils and its potential as an immuno-modulator for humans. The wide application of FA is challenged by two main factors affecting the quality and the effectiveness, i.e., the type of raw material and extraction method. Lignite, low-energy coal, is the most common material for FA production besides bog, peat, and compost. Fulvic acid extraction is done through several methods, i.e., hydrogen peroxide (H2O2), alkaline (NaOH/KOH), and/or water. The latest modified method shows that the combination of H2O2 with microwave power can recover a considerable amount of FA. However, it is still difficult to apply this method for industrial scale. Due to highly specified characteristics, FA showed a great potential to improve crop performances and soil health, making it strategic for supporting sustainable agriculture in the future through biotic and abiotic stress alleviations and sustainable yield achievement, including various plantation crops and biotechnological approach. For medicinal purposes, some studies have shown highly promising results, especially as an immuno-modulator and in combating neurodegenerative disorders as well as for cancer therapy and health food fortification, which might be in line with the new paradigm so-called One Health approach. The future market of FA is also estimated to grow in a very attractive economic value. However, as data are still limited, the wide range of potential use should encourage concerted and wide research and product development efforts to achieve sustainable agriculture and human health.

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“…At present, the PBZ is the only molecule recorded for mango cultivation (MAPA, 2021) and, due to its high persistence in the soil, it can cause long-term harm (Silva et al, 2020). A molecule with the potential to inhibit the biosynthesis of gibberellin is fenpropimorph, a morpholine with a regulating effect on the synthesis of sterols and plant hormones, whose efficiency for this purpose has already been verified in Poa annua L. (Ramoutar et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Gas exchanges and photosynthetic pigments of ‘Tommy Atkins’ mango as a function of fenpropimorph

Carreiro

Amariz

Sanches

et al. 2022

Rev. bras. eng. agríc. ambient.

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The objective of the present study was to evaluate the influence of the application of fenpropimorph and paclobutrazol on gas exchanges and photosynthetic pigments of ‘Tommy Atkins’ mango grown in the semi-arid region in different evaluation periods. Two experiments were carried out in ‘Tommy Atkins’ mango orchards in the first production cycle between September and December 2018 (first experiment) and between September and December 2019 (second experiment) in Petrolina, PE, Brazil. The experimental design adopted was randomized blocks in split plots in time, 4 × 4 + 1, with four replicates. The plots corresponded to the concentrations of fenpropimorph: 0, 0.7, 1.0, and 1.3 g per linear meter of plant canopy diameter plus the additional paclobutrazol treatment (1 g per linear meter of plant canopy diameter), and the subplots corresponded to the evaluation dates (0, 30, 60, and 90 days after the first application of treatments). The following traits were evaluated: CO2 assimilation rate, stomatal conductance, internal CO2 concentration, transpiration, water use efficiency, chlorophyll a, chlorophyll b, total chlorophyll, and carotenoids. The fenpropimorph dose of 1.3 g per linear meter of plant canopy promotes a higher rate of CO2 assimilation; however, paclobutrazol was more effective in the accumulation of chlorophyll a and total chlorophyll, and the use of fenpropimorph did not interfere in the concentration of photosynthetic pigments.

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Impact of fulvic acid and free amino acids on paclobutrazol absorption by ‘Keitt’ mango

Cited by 5 publications

References 23 publications

Flowering induction in mango tree: updates, perspectives and options for organic agriculture

Flowering induction in mango tree: updates, perspectives and options for organic agriculture

Fulvic acid – a small but powerful natural substance

Gas exchanges and photosynthetic pigments of ‘Tommy Atkins’ mango as a function of fenpropimorph

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