Structural and cytological aspects of mango floral induction using paclobutrazol

Oliveira, M. B.; Figueiredo, Maria Gabriela Ferreira; Pereira, Marlon Cristian Toledo; Mouco, M. A. do C.; Ribeiro, Leonardo Monteiro; Mercadante-Simões, Maria Olívia

doi:10.1016/j.scienta.2019.109057

Cited by 12 publications

(10 citation statements)

References 23 publications

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“…The growth of basil plants was reduced by the application of paclobutrazol because this compound alters Paclobutrazol on growth, chlorophyll indices and gas exchanges of basil caused by the inhibition of the routes of gibberellins, which negatively regulate floral induction and promote cell expansion (Oliveira et al, 2020). High levels of phenolic compounds in the plant can act as growth inhibitors due to their negative effects on cell division and elongation (Teixeira et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

“…Inflorescence dry mass was increased to 0.89 g at the 3.31 mg L -1 dose of PBZ, possibly due to greater vascular development of reproductive structures caused by increased levels of cytokinin and inhibition of gibberellin. PBZ also increased the number of flower of mango (Mangifera indica) (Oliveira et al, 2020). The number of leaves decreased with increasing PBZ dose due to inhibition of the gibberellins route.…”

Section: Methodsmentioning

confidence: 99%

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Paclobutrazol reduces growth and increases chlorophyll indices and gas exchanges of basil (Ocimum basilicum)

et al. 2022

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Basil (Ocimum basilicum) is a medicinal, ornamental and aromatic plant, however, its size can be an obstacle to its commercialization as a potted ornamental plant. Paclobutrazol (PBZ) is a substance that can retard plant growth by inhibiting the synthesis of gibberellins. The objective of this work was to evaluate the effect of paclobutrazol on growth regulation and gas exchange of basil (var. Cinnamon). The experiment was carried out in a completely randomized design with five treatments (PBZ doses: 0, 2.5, 5, 7.5 and 10 mg L-1), with eight replicates. Growth (plant height, number of leaves, stem diameter, leaf dry mass, stem dry mass, inflorescence dry mass, and total), growth rates (leaf mass ratio, stem mass ratio, inflorescence mass ratio, and robustness quotient), chlorophyll indices, gas exchange (gs, A, E, Ci, WUE, iWUE and iCE) were evaluated. Paclobutrazol reduced the growth of basil plants and increased the chlorophyll indices, A, gs, and WUE. Paclobutrazol can be used to regulate plant growth of basil plants var. Cinnamon, without altering its physiological and ornamental characteristics.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Paclobutrazol reduces growth and increases chlorophyll indices and gas exchanges of basil (Ocimum basilicum)

et al. 2022

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“…A aplicação de paclobutrazol como estratégia para produção de fl ores e frutos tem sido utilizada principalmente para em plantios comerciais, como Anacardium occidentale (Mog et al, 2019), Eucalyptus spp. (Santos et al, 2018;Castro et al, 2021) e Mangifera indica (Oliveira et al, 2020). No entanto, esta técnica mostrou-se muito útil para fi ns de conservação, podendo ser expandida para outras plantas com difi culdade de fl oração, como E. semicostata.…”

Section: Discussionunclassified

INDUÇÃO DE FLORESCIMENTO E FRUTIFICAÇÃO EM CAMPO DE Euplassa semicostata PLANA

2022

Bol.Téc.SIF

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Euplassa semicostata Plana é uma espécie arbórea da família Proteaceae ameaçada, de reprodução lenta e endêmica do Estado de Minas Gerais. Grande parte de sua população está em áreas de mineração com alto risco de supressão. Indivíduos desta espécie encontrados em um remanescente fl orestal da mineradora Vale S.A. foram monitorados por anos, contudo nunca fl oresceram. Estes fatores, em conjunto, podem levar a espécie à extinção. O objetivo deste trabalho foi induzir a fl oração e frutifi cação de árvores de E. semicostata no campo para produção de sementes e mudas que serão utilizadas em programas de recuperação de áreas degradadas. Sete indivíduos de E. semicostata foram encontrados e mapeados em um remanescente fl orestal em Nova Lima, Minas Gerais, Brasil. O paclobutrazol (PBZ), foi diluído na dose de 20mL em 5 litros de água e aplicado diretamente no solo, em um raio de dois metros ao redor do tronco de cinco árvores. Duas plantas não receberam a aplicação deste regulador de crescimento (testemunhas). A fl oração e a frutifi cação de E. semicostata foram monitoradas com visitas periódicas a cada 15 dias. Todos os cinco indivíduos que receberam a aplicação do paclobutrazol fl oresceram seis meses após o tratamento. Dois meses após o fl orescimento, três plantas frutifi caram e, posteriormente, produziram sementes e destas foram produzidas mudas que serão utilizadas em plantios visando recuperar populações naturais desta espécie em seu ambiente natural. As duas plantas utilizadas como testemunha não produziram fl ores, evidenciando a efi ciência do PBZ na indução do fl orescimento

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“…Amir et al [ 28 ] reported that the development of plant reproductive organs is related to the ratios of endogenous hormones in plants. Oliveira et al [ 29 ] suggested that measures can be adopted during the critical development periods of flowers and pods to increase the grain yield and the grain-setting characteristics of Chinese milk vetch.…”

Section: Discussionmentioning

confidence: 99%

Flower and pod development, grain-setting characteristics and grain yield in Chinese milk vetch (Astragalus sinicus L.) in response to pre-anthesis foliar application of paclobutrazol

et al. 2021

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The number of grains per unit land area is the most important grain yield component in Chinese milk vetch. Flower and pod survival seem to be critical determinants of grain number, which is related to the number of fertile flowers and pods during the anthesis period. Flower and pod growth are frequently considered the key determinants to establish grain number. The objective of this study was to explore the influences of paclobutrazol on flower and pod development, grain-setting characteristics and grain yield in Chinese milk vetch under different concentrations of foliar spray and try to explore the physiological regulatory mechanisms. Field experiments were carried out during the 2017–2018 and 2018–2019 growing seasons at the Dayuzhuang experimental field. The experiment involved the Chinese milk vetch cultivar “Xinzi No. 1” and six levels of foliar application of paclobutrazol, 0, 200, 300, 400, 500, and 600 mg L-1, in treatments CK, T1, T2, T3, T4, and T5, respectively. Foliar spray was applied once, at the squaring stage. In comparison with the CK treatment, all of the paclobutrazol treatments yielded, to various degrees, increased values of the number of inflorescences per unit area, number of pods per unit area, grain-setting rate of pods, and number of grains per pod in all six inflorescence layers, with the largest increases observed in the T3 treatment. In the T3 treatment compared with the CK treatment, from the first to sixth inflorescence layers, the number of inflorescences per unit area was increased by 34.07–58.97%, the number of pods per unit area was increased by 39.69–68.35%, the grain number per pod was increased by 44.31–53.69%, and the grain-setting rate of pods was increased by 1.84–4.89%. An analysis of yield composition revealed that the paclobutrazol spray treatment had little impact on the grain weight of Chinese milk vetch. The correlations between the concentration of paclobutrazol spray and the grain yield of Chinese milk vetch reached a significant level. Grain yield was highest at the paclobutrazol concentration of 373.10 mg/L. The inflorescence contents of gibberellic acid 3 (GA3), indole-3-acetic acid (IAA), and abscisic acid (ABA) were reduced, whereas that of cytokinin (CTK) was increased, by foliar application of paclobutrazol (400 mg L-1, T3 treatment) relative to CK treatment during the stages of flowers and pods developing into grains.

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Structural and cytological aspects of mango floral induction using paclobutrazol

Cited by 12 publications

References 23 publications

Paclobutrazol reduces growth and increases chlorophyll indices and gas exchanges of basil (Ocimum basilicum)

Paclobutrazol reduces growth and increases chlorophyll indices and gas exchanges of basil (Ocimum basilicum)

INDUÇÃO DE FLORESCIMENTO E FRUTIFICAÇÃO EM CAMPO DE Euplassa semicostata PLANA

Flower and pod development, grain-setting characteristics and grain yield in Chinese milk vetch (Astragalus sinicus L.) in response to pre-anthesis foliar application of paclobutrazol

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