Paclobutrazol or uniconazole effects on ethylene sensitivity of potted ornamental plants and plugs

Ahmad, Iftikhar; Dole, John M.; Whipker, Brian E.

doi:10.1016/j.scienta.2015.04.032

Cited by 9 publications

(8 citation statements)

References 19 publications

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“…2D) may be associated with the use of PBZ in floral management. PBZ is used to inhibit the gibberellin synthesis, but studies have shown that the plant regulator also inhibits the synthesis of ethylene (Ahmad et al, 2015;Antunes et al, 2008). According to Sexton and Roberts (1982), ethylene is directly involved in factors that promote mango fruit abscission; thus, by inhibiting synthesis of ethylene, PBZ also minimizes fruit drop, providing an increased number of fruit per tree.…”

Section: Discussionmentioning

confidence: 99%

Biostimulants on Nutritional Status and Fruit Production of Mango ‘Kent’ in the Brazilian Semiarid Region

Lobo¹,

Cavalcante²,

Lima³

et al. 2019

horts

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Adequate nutritional status is fundamental for the fruiting process of mango trees (Mangifera indica L.). In this context, plant biostimulants are substances that promote physiological and nutritional changes, benefiting production. The present study evaluated the effect of biostimulants on the nutritional status and fruit production of ‘Kent’ mango trees. The experiment was carried out in the Brazilian semiarid region over 2 consecutive years, 2016 and 2017. Leaf treatments with biostimulants were applied in three phases (preflowering, beginning of flowering, and full flowering) during both seasons. The treatments were as follows: T1) control (without biostimulants); T2) biostimulants containing nutrients and L-α-amino acids; T3) biostimulants containing nutrients and Lithothamnium algae extract; T4) biostimulants containing nutrients and sucrose; and T5) biostimulants containing nutrients, free amino acids, and Lithothamnium algae extract. The results show that there was no effect of the biostimulants for chlorophyll a, b, and total indices or for total leaf soluble carbohydrates. Some of the treatments affected the leaf concentrations of N, K, Mn, Fe, and Zn, whereas only T2 in 2016 and T5 in 2017 increased the number of fruits per panicle if compared with nontreated plants. In 2016, the production per tree was higher in T5 compared with the other treatments, whereas it was greater in 2017 in both T2 and T5 with increases of 37.4 and 23.1 kg per tree, respectively, compared with the control treatment. Biostimulants containing soluble nutrients, L-α-amino acids, free amino acids, and Lithothamnium algae extract benefit the nutritional status and increase the fruit production of mango ‘Kent’.

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Section: Discussionmentioning

confidence: 99%

Biostimulants on Nutritional Status and Fruit Production of Mango ‘Kent’ in the Brazilian Semiarid Region

Lobo¹,

Cavalcante²,

Lima³

et al. 2019

horts

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“…Some cultivars of the Capsicum genus which have ornamental quality characteristics such variegated foliage, small size, uniform canopy formation and strong coloring fruits are rather used as ornamental plants (REGO et al, 2009). In this vein, the paclobutrazol (PBZ) growth regulator has been widely used for adapting tall plants to dwarf ornamental plant (AHMAD et al, 2015;MUTLU et al, 2015;BOSCH et al, 2016). However, PBZ efficacy greatly depends on active ingredient, volume of solution, humidity and composition of substrate (CURREY and LOPEZ, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…However, PBZ efficacy greatly depends on active ingredient, volume of solution, humidity and composition of substrate (CURREY and LOPEZ, 2009). Likewise, the plant development stage, product concentration of the product, specie, cultivar and application method significantly influence the efficiency in providing the quality characteristics of ornamental potted plants (AHMAD et al, 2015;BOSCH et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of paclobutrazol application method on quality characteristics of ornamental pepper

França

Costa²,

Ribeiro

et al. 2017

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The effects of three paclobutrazol (PBZ) application methods on ornamental characteristics of two pepper cultivars (‘Biquinho Vermelha’ and ‘Bode Amarela’) were evaluated. Plant growth regulator at 10 μM PBZ was added at transplanting by drenching 250 mL PBZ solution on the pot substrate, foliar spray of 10 mL PBZ solution or by submerging seedlings root + substrate for 10 seconds in the PBZ solution. Control plants were treated with tap water applied directly on the substrate. Plant height, canopy compactness, fruits and leaves number, and leaf chlorophyll content were evaluated when 50% of the plants had approximately 30% of mature fruits (commercial maturity). PBZ applied by drenching influenced positively the ornamental characteristics of ‘Bode Amarela’. Otherwise, the best PBZ application method for ‘Biquinho Vermelha’ was not established. The results suggest that search for suitable PBZ application method that no affects the pepper ornamental characteristics must be done specifically for each pepper cultivar.

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“…The majority of growth regulators used in ornamental plant culture is inhibitors of gibeberellin (GA) biosynthesis used to control the size of plant, and improve compactness, such as paclobutrazol, which have been used to reduce the growth also in ornamentals as Dianthus barbatus x chinensis (LENZI et al, 2015); Hedychium (CRILEY, Scientific Article 2005); Curcuma spp. (KUEHNY et al, 2005;PINTO et al, 2006);heliconia (JADHAV et al, 2015), cuphea and petunia (AHMAD et al, 2015), oleander (OCHOA et al, 2009 and orchids (WANDERLEY et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Effects of plant growth regulators in heliconia ‘Red Opal’

Castro

Hawerroth

Taniguchi

et al. 2016

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The objective of this study was to evaluate growth regulators with purpose of reducing the size of heliconia ‘Red Opal’ potted plants. The experiment was carried out in randomized block design with five treatments (trinexapac-ethyl and paclobutrazol at rates of 37.5 and 75.0 mg of active ingredient per pot and control without growth regulator) and five replicates. The treatments were applied 40 days after planting the rhizomes in pots filled with soil. Thirty and 150 days after the growth regulator application, plant height, number of leaves and shoots, petioles length and leaf area were evaluated. One year after planting the rhizomes in pots the number of inflorescence and leaves (leaves, sheathing leaf bases and inflorescences) and rhizomes (rhizomes and roots) dry mass were determined. Trinexapac-ethyl had no differences compared to the control in any of the variables evaluated. Paclobutrazol proved effective in reducing plant height, leaf area and petiole length and increase in number of leaves and shoots but the effect was temporary. Also, it did not affect the inflorescences production and leaves and rhizomes dry mass. Paclobutrazol is efficient to promote height reduction and to increase the number of shoots in heliconia ‘Red Opal’ potted plants without affect the inflorescence formation but its effects is temporary.

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Paclobutrazol or uniconazole effects on ethylene sensitivity of potted ornamental plants and plugs

Cited by 9 publications

References 19 publications

Biostimulants on Nutritional Status and Fruit Production of Mango ‘Kent’ in the Brazilian Semiarid Region

Biostimulants on Nutritional Status and Fruit Production of Mango ‘Kent’ in the Brazilian Semiarid Region

Evaluation of paclobutrazol application method on quality characteristics of ornamental pepper

Effects of plant growth regulators in heliconia ‘Red Opal’

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