Effects of paclobutrazol on leaf anatomy and gas exchange of<i>Toona ciliata</i>clones

Rodrigues, L.; Castro, Evaristo Mauro de; Pereira, Fabricio José; Maluleque, I. F.; Barbosa, João Paulo Rodrigues Alves Delfino; Rosado, Sebastião Carlos da Silva

doi:10.1080/00049158.2016.1235476

Cited by 14 publications

(16 citation statements)

References 32 publications

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“…The effect of PBZ on abaxial and adaxial epidermal cells is quite controversial, with increasing (Tsegaw;Hammes;Robbertse, 2005) and no pronounced effects (Rodrigues et al, 2016;Carvalho-Zanão et al, 2017) being reported. These variations depend on the species, concentrations and environment (Tinoco et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

“…Leaves of plants treated with inhibitors of gibberellin tend to be smaller; however, there is no alteration in cell composition, thus increasing the thickness of the leaf tissue (Souza et al, 2007). Rodrigues et al (2016) assessing the effect of PBZ on leaf anatomy of australian cedar (Toona ciliata) clones reported an increase in palisade parenchyma thickness, spongy parenchyma thickness and mesophyll thickness as well as higher leaf thickness when treated at higher PBZ concentrations. Carvalho-Zanão et al (2017) studying leaf anatomy of Yellow Terrazza ® and Red White Terrazza ® rose cultivars treated with PBZ at concentrations of up to 80 mg L -1 reported increases in palisade parenchyma thickness, spongy parenchyma thickness and leaf thickness.…”

Section: Resultsmentioning

confidence: 99%

“…Morphological and anatomical responses to inhibitors of gibberellin biosynthesis have been reported (Kofidis;Giannakoula;Ilias, 2008;Rodrigues et al, 2016;Siqueira;Cecon;Salomão, 2008;Carvalho-Zanão et al, 2017). In Passiflora species, the use of triazoles has been linked to (Carvalho-Zanão et al, 2017), flowering (Nave et al, 2010), and crop yield (Berberich et al, 2006;Ataíde et al, 2006); however, no anatomical or morphological changes at seedling stage have been reported.…”

Section: Introductionmentioning

confidence: 99%

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Morphology of yellow passion fruit seedlings submitted to triazole induced growth inhibition

et al. 2019

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Inhibiting seedling vegetative growth may be a strategy for improving modulation against biotic and abiotic stresses after transplanting. The objective of this study was to evaluate morphological responses of yellow passion fruit (Passiflora edulis) seedlings to growth inhibition resulted from the application of an inhibitor of gibberellin biosynthesis. The experiment was carried out in a greenhouse using seedlings grown in 290 cm3 polyethylene tubes. At 40 days after emergence, trays containing the seedlings were immersed in solutions at concentrations of 0, 40, 80, 120 and 160 mg (Paclobutrazol) PBZ L-1 up to substrate saturation. These five treatments were laid out in a randomized block design with four replicates. At 15, 30 and 45 days after PBZ application (DAA), basal stem diameter was measured; at 45 DAA, stem diameter, individual leaf area, specific leaf area, root diameter and root volume were measured, lignin content and the anatomy of leaves, stems, and roots were analyzed. Triazole-induced anatomical alterations in stems, leaves and roots cause morphological traits and intensify the specific reagent staining of phenolic compounds and lignin in yellow passion fruit (Passiflora edulis) seedlings.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Morphology of yellow passion fruit seedlings submitted to triazole induced growth inhibition

et al. 2019

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“…1f).The lower S/R ratio enables the maximization of the water supply available to plants (Pinto et al, 2011). However, the growth changes induced by PBZ applications need to be studied further to elucidate the extensive effects of the interactions between this regulator and the clones (Rodrigues et al, 2016). Differences in clone sensitivity were observed for leaf number (LN) and TLA as a function of PBZ concentration (Fig.2).…”

Section: Morphological Characteristicsmentioning

confidence: 99%

“…Similarly, the results of the leaf area analysis showed that the values of clone AEC 144 were significantly higher than those of clone AEC 1528 at 0, 100 and 150 ppm, but no differences were evident at 50 or 200 ppm (Fig.2d). Zhou et al (2012) and Rodrigues et al (2016) studied the effects of PBZ on Tectona grandis and reported that higher concentrations of PBZ induced thicker leaflets that had scleromorphic characteristics that were similar to the leaves of Toona ciliata clones, and genotypic differences among clones (BV1110, BV1321, BV1120 and BV1151) played a role. Cauvin (1991) also reported changes in the length and width of leaves of the hybrid clones of Eucalyptus gunnii x E. grandis, E. urophylla x E. grandis and E. gunnii x Eucalyptus dalrympleana following application of PBZ.…”

Section: Morphological Characteristicsmentioning

confidence: 99%

Modulation of the initial growth of Eucalyptus clones using paclobutrazol: when smaller is better

Santos¹,

Matsumoto²,

Silva³

et al. 2018

Aust J Crop Sci

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Modulating the growth rates of Eucalyptus during the initial vegetative phase via plant growth regulators can improve field establishment. The objective of this study was to verify the impacts of different concentrations of paclobutrazol (PBZ) on two Eucalyptus hybrids during the initial phase of growth. Experiments were conducted in a greenhouse using an E. urophylla x E. grandis hybrid (AEC 1528) and a spontaneous hybrid of E. urophylla (144 AEC). Both clones were subjected to PBZ concentrations of 0, 50, 100, 150 and 200 ppm active ingredient (a.i.) applied to the soil. The treatments were part of a 2x5 factorial design, and they were arranged into randomized blocks and consisted of five replicates. Cuttings were transplanted into 20-L pots; each pot contained one cutting and was considered an experimental unit. At90 days after the application of PBZ, the growth and development of both Eucalyptus clones subjected to all concentrations were inhibited. The inhibition effects intensified as the concentration of PBZ increased until approximately 90 to146 ppm and increased the plant sturdiness ratio (H/D; S//diameter) due to the inhibition of height caused by PBZ. Clone AEC 144 performed better than clone AEC 1528with respect to dry mass accumulation, LN and leaf area. However, clone AEC 1528 was superior with respect to resource partitioning due to a lower S/R ratio, aiding survival underwater deficit conditions.

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Effects of Paclobutrazol and Potassium Nitrate in Improving the Flowering Performance of Xanthostemon chrysanthus (F. Muell.) Benth

Roseli¹

2022

Urban Forestry and Arboriculture in Malaysia

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Effects of paclobutrazol on leaf anatomy and gas exchange ofToona ciliataclones

Cited by 14 publications

References 32 publications

Morphology of yellow passion fruit seedlings submitted to triazole induced growth inhibition

Morphology of yellow passion fruit seedlings submitted to triazole induced growth inhibition

Modulation of the initial growth of Eucalyptus clones using paclobutrazol: when smaller is better

Effects of Paclobutrazol and Potassium Nitrate in Improving the Flowering Performance of Xanthostemon chrysanthus (F. Muell.) Benth

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