Effect of plant growth regulators on visual quality of turfgrass

Głąb, Tomasz; Szewczyk, Wojciech; Gondek, Krzysztof; Knaga, Jarosław; Tomasik, M.; Kowalik, Klaudia

doi:10.1016/j.scienta.2020.109314

Cited by 26 publications

(22 citation statements)

References 29 publications

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“…The fact of this reduction has occurred, is probably by execute mechanism of Paclobutrazol action, which acts in phase 2 of gibberellin synthesis root. Active ingredient blocks action performs of Kaurene Oxidase enzyme preventing formation of any gibberellin type (March et al, 2013;Glab et al, 2020), and thus, formation of the most compact leaf and, consequently, the lowest lawn growth (McElroy, 2012).…”

Section: Resultsmentioning

confidence: 99%

“…Paclobutrazol acts on the synthesis route of gibberellins, and interferes in phase 2, that is, it blocks the action of the enzyme Kaurene Oxidase, which inhibits the conversion of kurene into kaurenol and, consequently, prevents the formation of any type of gibberellin as well as cellular elongation, creating compact leaf (McElroy, 2012;March et al, 2013;Glab et al, 2020). When applied directly to the soil or substrate, it has greater activity and efficiency compared to foliar application, as it is translocated almost exclusively by xylem and less by phloem, where it is absorbed by the roots and moved directly to the growth points (McCarty, 2008;Blank et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Paclobutrazol as growth regulator in Bahiagrass

et al. 2020

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Bahiagrass (Paspalum notatum) is a native species widely found on highways margins, however, cutting practices are necessary, which increase the maintenance cost, being an alternative, the use of growth regulators, such as Paclobutrazol. Thus, the objective of the present study was to evaluate the use of Paclobutrazol doses as growth regulator in Bahiagrass. The turf was implanted in black plastic containers (8.46 L), previously prepared with the mixture of soil + sand + organic compost (1:1:1). The experimental design was completely randomized, composed of 3 doses of Paclobutrazol [1.1 and 2.2 kg a.i. (active ingredient) ha-1 + control (0 kg a.i. ha-1)], in four applications of 2 L of syrup per container, thus forming a factorial 3x4 (doses x response time) with 3 repetitions. The fresh and dry mass, relative chlorophyll index, leaf N and the visual aspect of the green cover rate were evaluated on four different dates. It was observed that the product controlled the growth of the lawn, with less production of fresh and dry mass, and increase of the relative index of chlorophyll and concentration of leaf nitrogen; however, it decreased turfgrass density of green mass, which influenced the visual lawn aspect. Thus, Paclobutrazol controlled Bahiagrass growth at a dose of 2.2 Kg a.i. ha-1 in regular applications of 30 to 45 days, however it affected the density and consequently the aesthetics of the turfgrass.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Paclobutrazol as growth regulator in Bahiagrass

et al. 2020

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“…Although the doses of 1.0 and 2.0 mL L -1 did not differ from each other, it can be observed that with increasing concentrations, there is a decrease of fresh mass, which is explained by its mechanism of action. Paclobutrazol blocks enzyme ent-kaurene oxidase action inhibiting the conversion of ent-kaurene to ent-kaurenol, which prevents any type of gibberellin formation (Glab et al, 2020), creating more compact leaf (McElroy, 2012). Working with ´TifEagle´ (C. dactylon x C. transvaalensis), McCullough et al (2004) observed 86% of reduction in grass clippings amount with two Paclobutrazol applications, with intervals of three weeks between them.…”

Section: Resultsmentioning

confidence: 99%

“…Paclobutrazol is a well-studied regulator, and registered for several species of grass in the European Union (Semillas Fitó, 2010) and in the USA (McEloroy, 2012). It is a compound of triazole group and reduces plant growth by blocking the action of the enzyme ent-kaurene oxidase, which inhibits the conversion of ent-kaurene to ent-kaurenol, which prevents the formation of any type of gibberellin (Glab et al, 2020). On the other hand, for several products such as trinexapac-ethyl and prohexadione-calcium and the herbicides, imazethapyr, metsulfuron-methyl, imazaquin and glyphosate (Dinalli et al, 2015;Marchi et al, 2017;Queiroz et al, 2017;Dias et al, 2019;Gazola et al, 2019) there are reports as being used in lawns for growth control.…”

Section: Introductionmentioning

confidence: 99%

Paclobutrazol and phenoxaprope-P-ethyl potential as growth regulator in Carpet grass Plus®

et al. 2020

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Mowing is a fundamental management for turfgrass development. However, this operation has a higher cost, requiring alternatives to mechanical handling, such as growth regulators use. Thus, the objective was to evaluate the use of paclobutrazol and phenoxaprope-P-ethyl as growth regulators in Carpet grass Plus®. The experiment was performed in full sun, in the northwest region of São Paulo state, from January to March 2020. The grass used was planted in black plastic containers (50 x 17 cm, with a height of 15 cm, totalling 11 L of volume), previously prepared with a mixture of soil + sand (2:1). The experimental design was completely randomized, consisting of two doses of paclobutrazol (1.0 and 2.0 mL L-1) + control and two doses of phenoxaprope-P-ethyl (6.25 and 12.5 µL L-1) + control. Leaf chlorophyll index, digital image analysis and fresh leaf mass were evaluated. It was observed that for Carpet grass Plus®, there was paclobutrazol effect when used as a growth regulator, with the recommended dose of 2 ml L-1 due to its residual effect up to 35 days in reducing fresh mass, without changing the concentration of leaf chlorophyll and green colour. Phenoxaprope-P-ethyl, on the other hand, had an effect as a growth regulator for the studied species, when used in the dose of 6.25 µL L-1.

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“…High density is required not only to cover the terrain of sport lawns, but also to form a cushioning surface, which has the potential to reduce the impact of athletes' sports activities (Gobilik et al, 2013). Density, uniformity, texture, smoothness, soil coverage and bonding are functional characteristics and aesthetic value to be analyzed for the evaluation of the quality of a turfgrass by researchers and breeders (Glab et al, 2020).…”

Section: Development Of Paspalum Accession Plugs For Turfgrass Establmentioning

confidence: 99%

Development of Paspalum accession plugs for turfgrass establishment

et al. 2020

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The selection of a genotype for lawn use must consider the plant survival rate and its soil covering ability, which is directly influenced by the growth of stolons and rhizomes. This study aimed to evaluate the growth and development of Paspalum accession plugs for turfgrass establishment. Plugs of six prostrate growth accessions of Paspalum lepton (PL 01), P. notatum (from PN 01 to PN 06) and Zoysia japonica (ZJ 01), which was used as the control treatment, were planted adding up to 7 treatments. At 63 days after planting, the survival rate, the number of shoots, the expansion capacity, plant height and soil coverage rate were evaluated. Moreover, at 72 days after planting, fresh and dry leaf, root, rhizome and/or stolon biomass, as well as root length were evaluated. Plugs of PL 01 presented the highest values regarding the number of shoots, the expansion capacity, soil coverage and the development of the root system with the largest biomass production. PL 01 and PN 05 along with ZJ 01 presented a high soil coverage rate and all the P. notatum (PN) accessions together with ZJ 01 maintained a lower plant height, but with a length root system higher than the control treatment ZJ 01. The P. lepton (PL 01) and P. notatum (PN 05) accessions can be recommended for turfgrass establishment using plug propagation methods.

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Effect of plant growth regulators on visual quality of turfgrass

Cited by 26 publications

References 29 publications

Paclobutrazol as growth regulator in Bahiagrass

Paclobutrazol as growth regulator in Bahiagrass

Paclobutrazol and phenoxaprope-P-ethyl potential as growth regulator in Carpet grass Plus®

Development of Paspalum accession plugs for turfgrass establishment

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