Evaluation of paclobutrazol application method on quality characteristics of ornamental pepper

França, Christiane de Fátima M; Costa, Lucas Cavalcante da; Ribeiro, Wellington Souto; Mendes, Teresa Drummond Correia; Santos, Mirelle Nayana de Sousa; Finger, Fernando Luíz

doi:10.14295/oh.v23i3.1074

Cited by 10 publications

(10 citation statements)

References 8 publications

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“…The most common application methods of PBZ are foliar sprays and media drench. PBZ shows good results for both methods [32]; however, drenches act longer and provide uniform control of plant height with lower doses [33]. When PBZ is applied by foliar spray, the compound is poorly soluble in water and consequently little translocated in the phloem.…”

Section: Methods Of Applicationmentioning

confidence: 99%

Paclobutrazol as a plant growth regulator

Desta

Amare

2021

Chem. Biol. Technol. Agric.

176

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Plant growth regulators are chemical substances which govern all the factors of development and growth within plants. The application of plant growth regulators to crops modifies hormonal balance and growth leading to increased yield, enhanced crop tolerance against abiotic stress and improved physiological trait of crops. Paclobutrazol (PBZ) [(2RS, 3RS)-1-(4-chlorophenyl)- 4, 4-dimethyl-2-(1H-1, 2, 4-trizol-1-yl)-pentan-3-ol], is one of the members of triazole family having growth regulating property. The growth regulating properties of PBZ are mediated by changes in the levels of important plant hormones including the gibberellins (GAs), abscisic acid (ABA) and cytokinins (CK). PBZ affects the isoprenoid pathway, and alters the levels of plant hormones by inhibiting gibberellin synthesis and increasing cytokinins level and consequent reduction in stem elongation. When gibberellins synthesis is inhibited, more precursors in the terpenoid pathway accumulate and that resulted in the production of abscisic acid. PBZ is more effective when applied to the growing media and application on the growing medium would give longer absorption time and more absorption of active ingredient than foliar spray. The application of PBZ to crops is important in reducing plant height to prevent lodging and in increasing number and weight of fruits per tree, in improving the fruit quality in terms of increases in carbohydrates, TSS, TSS/TA and decreases acidity. It further reduces evapo-transpiration and decreases plant moisture stress by enhancing the relative water content of leaf area and develops resistance in the plants against biotic and abiotic stresses. In addition, it acts as highly active systemic fungicide and used against several economically important fungal diseases. In this review, the current knowledge and possible applications of PBZ, which can be used to improve the growth, yield and quality of crops, have been reviewed and discussed. The role of PBZ to mitigate the harmful effects of environmental stresses in crops is also examined. Moreover, various biochemical and physiological processes leading to improved crop production under the effect of PBZ are discoursed in detail.

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Section: Methods Of Applicationmentioning

confidence: 99%

Paclobutrazol as a plant growth regulator

Desta

Amare

2021

Chem. Biol. Technol. Agric.

176

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“…Therefore, in this study, PBZ was efficient in reducing chlorophyll degradation in leaves caused by ethylene. Most studies with PBZ are focused on the effects it causes on plant size, flowering and fruiting, as reported by França et al, (2017 and and Ribeiro et al, (2019b) in Capsicum spp. Whatever the positive effects that PBZ can provide to peppers, in terms of sensitivity to ethylene, it is extremely important to improve plant quality and increase shelf life.…”

Section: Resultsmentioning

confidence: 99%

“…Several authors describe the action of paclobutrazol (PBZ) in inhibiting ethylene synthesis in plants (Min & Bartholomew, 1996;Antunes, Ono & Sampaio, 2008;Ahmad, Dole & Whipker, 2015). PBZ is a regulator that blocks the biosynthesis of gibberellic acid, inhibiting plant growth and increasing chlorophyll in ornamental pepper leaves (França et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Effects of paclobutrazol on ethylene sensitivity of potted pepper cultivars

Nascimento

Araújo

Santos

et al. 2022

RSD

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Exposure to ethylene of ornamental plants is one of the factors that affect the life cycle post-production of these plants. The aim of this work was to evaluate the effects of paclobutrazol (PBZ) on the ethylene related responses of ten pepper cultivars of the genus Capsicum and one Solanum by simulating transport and commercialization. The cultivars were treated with PBZ at concentrations of 0, 5, 10 and 20 mg L-1 applied on the potted cultivation substrate. When the plants had 30% of ripe fruits, they were transferred to a 90 L sealed container and treated with 10 μL L-1 ethylene for 48 hours and then kept at room temperature. Percentages of leaf (LA) and fruit abscission (FA) the plants were recorded at every two days (48h, 96h and 144h). The design used was completely randomized, in an 11 x 4 factorial scheme. The PBZ did not completely inhibit the deleterious effects of exogenous ethylene on plants. However, the ‘Pérola Negra’ showed moderate sensitivity for leaf and fruit abscission, and the ‘Bode Vermelha’ for leaf abscission at a concentration of 10 mg L-1. PBZ prevented partially the abscission of fruits of the ‘Pirâmide Ornamental’ pepper at rates of 5 and 10 mg L-1, and ‘Tabasco’ pepper at a concentration of 10 mg L-1. In addition, cultivars showed darker foliage when treated with PBZ.

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“…In pepper (Capsicum chinense cvs. 'Bode Amarela' and 'Biquin Vermelha'), plant height and total leaf number were unchanged after 10 µM PBZ foliar spray, whereas only plant height was retarded after soil drenched PBZ application (França et al, 2017). In the root zone, overall root and rhizome traits in cv.…”

Section: Discussion Discussion Discussionmentioning

confidence: 96%

Regulation of curcuminoids, photosynthetic abilities, total soluble sugar, and rhizome yield traits in two cultivars of turmeric (Curcuma longa) using exogenous foliar paclobutrazol

Chungloo

Tisarum

Samphumphuang

et al. 2021

Not Bot Horti Agrobo

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Paclobutrazol (PBZ) is a member of plant growth retardants, commonly applied for growth regulation, yield improvement, and biotic and abiotic stress alleviation. However, the effects of PBZ on turmeric (Curcuma longa L.; Zingiberaceae), a rhizomatous herb, have not been well established. The objective of this investigation was to gain a better understanding of the effect of PBZ on two different varieties of turmeric plants, ‘Surat Thani’ (‘URT’; high curcuminoids >5% w/w) and ‘Pichit’ (‘PJT’; low curcuminoids <3% w/w). Pseudostem height of cv. ‘PJT’ treated by 340 µM PBZ was significantly decreased by 14.82% over control, whereas it was unchanged in cv. ‘URT’. Interestingly, leaf greenness (SPAD value), maximum quantum yield of PSII (Fv/Fm) and photon yield of PSII (ΦPSII) in cv. ‘PJT’ treated by 340 µM PBZ were significantly elevated by 1.47, 1.28 and 1.23 folds, over control respectively. Net photosynthetic rate (Pn) in cv. ‘PJT’ declined by 38.58% (340 µM PBZ) over control, as a result of low levels of total soluble sugars (TSS; 127.8 mg g-1 DW) in turmeric rhizome. A positive relation between photosynthetic abilities and aerial fresh weight was demonstrated. In addition, a negative relationship between TSS and total curcuminoids was evidently found (R2 = 0.4524). Curcuminoids yield in turmeric rhizomes significantly dropped, depending on the degree of exogenous foliar PBZ applications. In summary, cv. PJT was found to be very sensitive to PBZ application, whereas rhizome yield and growth traits and high amount of curcuminoids were retained in cv. ‘URT’. Plant growth retention in turmeric cv. ‘URT’ using 170 mM PBZ foliar spray without negative effects on rhizome biomass and total curcuminoids content was demonstrated.

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Evaluation of paclobutrazol application method on quality characteristics of ornamental pepper

Cited by 10 publications

References 8 publications

Paclobutrazol as a plant growth regulator

Paclobutrazol as a plant growth regulator

Effects of paclobutrazol on ethylene sensitivity of potted pepper cultivars

Regulation of curcuminoids, photosynthetic abilities, total soluble sugar, and rhizome yield traits in two cultivars of turmeric (Curcuma longa) using exogenous foliar paclobutrazol

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