Potted rose cultivars with paclobutrazol drench applications

Carvalho-Zanão, Maristela Pereira; Júnior, Luiz Antônio Zanão; Grossi, José Antônio Saraiva; Pereira, Natalia

doi:10.1590/0103-8478cr20161002

Cited by 7 publications

(11 citation statements)

References 21 publications

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“…Genotype has a significant effect on the plant's response to PBZ as reported in Curcuma (Sarmiento and Kuehny, 2003) and Zantedeschia (Corr and Widmer, 1991). Plant height, leaf area and dry matter in two rose cultivars, 'Yellow Terrazza' and 'Shiny Terrazza' tend to decline with increase in a PBZ concentration (Carvalho-Zanão et al, 2018). In pepper (Capsicum chinense cvs.…”

Section: Discussion Discussion Discussionmentioning

confidence: 84%

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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Section: Discussion Discussion Discussionmentioning

confidence: 84%

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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“…The reduction in the stem mass ratio occurred due to the inhibition of the biosynthesis of gibberellic acid by PBZ, causing a reduction in cell division and resulting in compact plants (Parladore et al, 2019). The inflorescence mass ratio is associated with the restriction of cell expansion and the accumulation of phenolic compounds in the stem regulator to increase cytokinin levels and, thus, increase chloroplast differentiation, chlorophyll biosynthesis and prevent its degradation (Carvalho-Zanão et al, 2018;Huang et al, 2019). The application of PBZ also increased chlorophyll levels in cucumber (Cucumis sativus) (Baninasab and Ghobadi, 2011) and stevia (Stevia rebaudiana) (Hajihashemi and Ehsanpour, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…The greater the gas exchange, the greater the carbon assimilation and, consequently, more photosynthesis (Ferraz et al, 2012). The negative correlation between plant height and total chlorophyll may have been caused by the effect of PBZ on cell size reduction, having a low concentration of chlorophyll and a reduction in the intracellular space, causing the chloroplasts to become more dense (Carvalho-Zanão et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

“…When the synthesis of gibberellins is inhibited, more precursors in the terpenoid pathway accumulate, resulting in the production of abscisic acid, which leads to less growth and development of the shoot plant (Soumya et al, 2017). The application of PBZ also reduced the height and diameter of rose (Rosa hybrida) (Carvalho-Zanão et al, 2018) and platycodon (Platycodon grandiflorus) (Sabino et al, 2021). 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.…”

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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“…Monooxygenases catalyze the steps that ent-kaurene is oxidized and ent-kaurenoic acid was synthesized. Paclobutrazol works through inhibiting monooxygenases [17] [18]. The levels of active gibberellins in plants decreased remarkably after being sprayed with paclobutrazol [19] [20].…”

Section: Discussionmentioning

confidence: 99%

A Method for Prolonging Culturing Time of Banana Seedling in Nursery Shed

Chang¹,

Wu²,

Qi³

et al. 2019

ABB

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Banana industry plays important roles in the economics of southern China, where is always blown by typhoon in summer and autumn. After typhoon passed through, fresh banana seedlings are often required. That is a problem for companies on culturing banana seedling, since culturing banana seedlings takes about four months and typhoon cannot be predicted so early. If the growth of banana seedlings can be slowed down and the seedlings can be cultured in nursery shed for more time, this problem will be solved. In this research, seven treatments (paclobutrazol, diniconazole, paclobutrazol + brassins, paclobutrazol + diethyl aminoethyl hexanoate, diniconazole + brassins, diniconazole + diethyl aminoethyl hexanoate, chlormequat chloride) were performed on banana seedlings and the growth was measured. Results showed that in all of the treatments, the values of plant height, leaf length, pseudostem diameters, root length, root weight, root volume, fresh weight of above-ground tissues and fresh weight of seedlings were significantly less than those corresponding values of control. The reducing powers of roots of seedlings sprayed with paclobutrazol and paclobutrazol + diethyl aminoethyl hexanoate were remarkably higher than those of seedlings treated with water. Total chlorophyll content in leaves of seedlings sprayed with paclobutrazol was remarkably higher than that of seedlings treated with water. Total chlorophyll contents in leaves of seedlings treated with paclobutrazol + diethyl aminoethyl hexanoate and chlormequat chloride were lower than those of control. For delaying the growth of banana seedlings, chlormequat chloride was the best among the seven treatments. The mechanism might be that the enzyme CPP-synthase in seedlings was inhibited by chlormequat chloride.

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Potted rose cultivars with paclobutrazol drench applications

Cited by 7 publications

References 21 publications

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

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

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

A Method for Prolonging Culturing Time of Banana Seedling in Nursery Shed

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