Physalis size reduction for potted ornamental plant use

Abstract

The consumer's constant search for novelties in the area of ornamental plants has inspired the use of species that are normally used for other purposes, such as fruit-bearing plants, to be introduced into floriculture. The physalis, a fruit-bearing plant, with a beautiful accrescent fruiting calyx that envelops the berry, can be used for these purposes. However, this plant can reach 70 cm high, which makes it unviable to be used as an indoor plant. The objective of this research was to decrease the size of the physalis (Physalis angulata) for ornamental use, pot it and apply the plant growth regulator Paclobutrazol (PBZ). The PBZ growth regulator was applied only once, via foliar spray at the concentrations of 0, 30, 60, 90, 120 and 150 mg a.i L . Along with the quantitative variables, a plant acceptability test was carried out when it was considered ideal for commercialization. The obtained results clearly show that it is possible to reduce the size of the physalis for use as a potted plant by using PBZ with foliar applications at the concentration of 90 mg a.i L -1 or by using irrigation applications directly in the substrate at a concentration of 5 mg a.i L Index terms: Physalis angulata; plant regulator; Paclobutrazol; sensorial analysis; ornamental fruit bearing plants. RESUMOA constante busca dos consumidores de plantas ornamentais por novidades estimula que espécies utilizadas para outros fins, como as plantas frutíferas, possam ser introduzidas na floricultura. O fisális, uma planta frutífera, cujos frutos são envolvidos por um belo cálice em forma de balão, pode ser utilizado para este fim. Entretanto, essa planta pode chegar a 70 cm de altura, o que inviabiliza o seu cultivo em vasos como planta de interior. Objetivou-se com essa pesquisa diminuir o porte de plantas de fisális (Physalis angulata) para uso ornamental envasado com a aplicação do regulador vegetal Paclobutrazol (PBZ). Para isso utilizou-se o regulador vegetal PBZ, uma única vez, via pulverização foliar nas concentrações de 0, 30, 60, 90, 120 e 150 mg i.a L . Adicionalmente as variáveis quantitativas, foi aplicado um teste de aceitabilidade das plantas no momento em que se considerava ideal para comercialização. Os resultados obtidos demonstraram que é possível a redução do porte de fisális para uso como planta envasada utilizando PBZ com aplicação foliar na concentração de 90 mg i.a L -1 ou com aplicação via irrigação do substrato na concentração de 5 mg i.a L -1 . Termos para indexação: Physalis angulata; regulador vegetal; Paclobutrazol; análise sensorial; frutífera ornamental.

Paclobutrazol application in potted ornamental pepper

“…The LD/TD ratio was not significant for any PBZ concentration in the evaluated genotypes. However, plant diameter was reduced with PBZ application, in agreement with Grossi et al (2005), Tinoco et al (2011) and Bosch et al (2016). This plant diameter reduction is directly related to the internode elongation reduction due to gibberellin biosynthesis inhibition.…”

Evaluation of paclobutrazol application method on quality characteristics of ornamental pepper

“…This fact is related to the nature of this plant growth regulator, which presents little solubility in water, making it impossible to translocate via phloem, acting only on contact area (RIBEIRO et al, 2011). Differently, studying Physalis growth regulation by PBZ, Bosch et al (2016) found appropriate plant size for use as an ornamental by both foliar spray and drench methods. However, the concentration of PBZ for foliar spray was 94% higher than used in drench method.…”

“…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).…”

“…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).…”

Effects of Plant Growth Retardants and Pot Sizes on the Height of Potting Ornamental Plants: A Short Review

“…According to Yassin et al [24] investigation on the effects of growth retardant chemicals on stock plant growth and subsequent rooting of Verbena (Verbena X hybrids) cuttings, the chemicals, Alar and Cycocel, have influenced the growth of Verbena without affecting the root performance of the crop. Bosch et al [25] also investigated the effects of plant growth retardants on the physalis, a fruit-bearing ornamental plant, by using Paclobutrazol growth regulator focusing on the plant height. According to the finding, the highest concentration of PBZ applications reduced to the plant height to the desired level ( Figure 1).…”