Ácidos húmicos de vermicomposto estimulam o crescimento in vitro de plântulas de Cattleya warneri(Orchidaceae)

Silva, Maria Alice Costa da; Santos, Wolmen O.; Simoura, Nágila Teixeira; Tesch, Juliétty Angioletti; Ruas, Katherine Fraga; Colodete, Carlos Moacir; Tannure, Fernanda Pavesi; Barbirato, Juliano de Oliveira; Ramos, Alessandro Coutinho; Dobbss, Leonardo Barros

doi:10.1590/2175-7860201566307

Cited by 6 publications

(3 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Em outro experimento, Marino et al (2008), analisando o conteúdo mineral e respiração das raízes in vitro de Kiwis (Actinidia deliciosa) tratados com substâncias húmicas verificaram a maior massa fresca das raízes, quando aplicaram 10 mg L −1 . Por outro lado, Silva et al (2015) observaram que em Cattleya warneri a adição de ácidos húmicos no meio de cultura proporcionou um incremento de 81 e 159 % em relação ao controle, para a massa fresca das folhas e das raízes, respectivamente.…”

Section: Resultsunclassified

Substâncias húmicas e ácido indolbutírico no enraizamento in vitro de mirtileiro 'Woodard'

Oliveira

Assis

Maciejewski

et al. 2021

RSD

View full text Add to dashboard Cite

O objetivo do trabalho foi avaliar o efeito da presença e ausência de ácido indolbutírico e concentrações de substâncias húmicas no enraizamento in vitro de mirtileiro ‘Woodard’. O delineamento experimental foi o inteiramente casualizado, em esquema bifatorial 2x3, sendo os fatores: presença (1 mg L-1) ou ausência (0 mg L-1) de regulador de crescimento ácido indolbutírico (AIB) e concentrações de substâncias húmicas (SH) (Solohumics®) (0; 1; 2; 3 mg L-1). Aos 60 dias avaliou-se: porcentagem de sobrevivência, comprimento da parte aérea, número de brotações, comprimento da maior brotação, porcentagem de enraizamento, número de raízes, comprimento da maior raiz, massa de matéria fresca e seca de parte aérea e raiz. Os resultados mostram que com exceção do tratamento sem o uso de SH e AIB, nos demais houve 100% de sobrevivência. O maior comprimento da parte aérea foi verificado sem o uso de AIB e com 3 mg L-1 de SH, bem como da maior brotação, raiz, número de raízes, da massa da matéria fresca da parte aérea e massa de matéria seca das raízes. O maior número de brotos foi observado sem o uso de AIB e com 2 mg L-1 de SH. Quanto ao enraizamento, sem o uso de AIB e SH não houve formação de raiz, diferindo das demais, que apresentaram 100% de enraizamento. A maior média da massa da matéria seca da parte aérea foi obtida com o uso de AIB e 3 mg L-1 de SH. Assim, concluiu-se que o enraizamento in vitro de mirtileiro ‘Woodard’ pode ser realizado com o uso de 3 mg L-1 de substâncias húmicas, sem o ácido indolbutírico.

show abstract

Section: Resultsunclassified

Substâncias húmicas e ácido indolbutírico no enraizamento in vitro de mirtileiro 'Woodard'

Oliveira

Assis

Maciejewski

et al. 2021

RSD

View full text Add to dashboard Cite

show abstract

“…This effect depends on the HA concentration, the application time and the plant species. Silva et al (2015) observed optimal HA concentrations for the growth of Cattleya warneri seedlings in vitro of approximately 48 mg L -1 C. When evaluating the rooting of sugarcane micro-shoots, Marques Jr. et al (2008) obtained optimum growth with 19 mg L -1 C. Lima et al…”

Section: Introductionmentioning

confidence: 99%

Promoting the growth of Brachiaria decumbens by humic acids (HAs)

Pinheiro¹,

Passos²,

Peçanha³

et al. 2018

Aust J Crop Sci

View full text Add to dashboard Cite

The increasing demand for meat and milk has stimulated interest in the development and recovery of pastures. Although humic acids (HAs) have been shown to have a biostimulating effect on plant growth, their use in pastures remains relatively unknown. This study aimed to evaluate the growth of Brachiaria decumbens at different HAs concentrations and application times. This study was conducted in a greenhouse with pots containing 1.5 L of soil collected in a degraded pasture. A trial was carried out in a randomized block design in which five HAs concentrations (0, 7.5, 15, 30 and 60 mg L-1 C) and four application times were used as follows: leaf spray 15 days after emergence (LS 15 DAE); LS 45 DAE; LS 60 DAE; and successive leaf sprays (15, 45 and 60 DAE). Stem height, diameter, forage production and root development were evaluated. Height and stem diameter measurements were performed weekly. At 45 and 90 DAE, a cut was made at a height of 10 cm to simulate grazing and to measure forage production. At 90 DAE, the root mass was assessed. The HAs used at the concentration of 60 mg L-1 C applied at 15 DAE promoted increases of 44% in plant height and 196% in forage mass. After the cut, the optimum concentration was approximately 40 mg L-1 C. Although the use of HAs promoted root development, successive applications had deleterious effects on the plant. HAs could improve pasture biomass production at a low cost if applied at the ideal concentration.

show abstract

“…Such substances present bio-stimulating effect, very similar to the auxins (BALDOTTO and BALDOTTO, 2013), besides they are nutrient sources for the plants, providing carbon, nitrogen, phosphorus and sulfur (SILVA et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Collection positions in the branch, humic substances and indolebutyric acid in ‘Arbequina’ olive minicuttings

et al. 2021

View full text Add to dashboard Cite

Obtaining quality plantlets is essential for the expansion of olive growing in Brazil. Olive tree plantlets are produced by cuttings and the great obstacle for the production of plantlets on a large scale is the low rooting rate. In this sense, minicutting is a promising alternative, as it can optimize the collection of propagules and provide an improvement in the rooting index. The objective of this study was to verify the propagation of ‘Arbequina’ olive minicuttings collected in different positions of the branch and submitted to concentrations of humic substances with and without the use of indolebutyric acid (IBA). The experimental design was completely randomized, in a bifactorial scheme: collection positions in the branch (basal, median and apical) and concentrations of humic substances (SoloHumics®) with and without IBA (10 mL SoloHumics® + 0 mg L-1 IBA; 10 mL SoloHumics® + 1,000 mg L-1 IBA; 10 mL SoloHumics® + 2,000 mg L-1 IBA; and 10 mL SoloHumics® + 3,000 mg L-1 IBA). The ‘Arbequina’ olive tree can be propagated by basal and apical minicuttings submitted to the use of SoloHumics® + 1,000 mg L-1 of IBA and by medium minicuttings treated with SoloHumics® + 2,000 mg L-1 of IBA, due to the greater rooting potential.

show abstract

Ácidos húmicos de vermicomposto estimulam o crescimento in vitro de plântulas de Cattleya warneri(Orchidaceae)

Cited by 6 publications

References 27 publications

Substâncias húmicas e ácido indolbutírico no enraizamento in vitro de mirtileiro 'Woodard'

Substâncias húmicas e ácido indolbutírico no enraizamento in vitro de mirtileiro 'Woodard'

Promoting the growth of Brachiaria decumbens by humic acids (HAs)

Collection positions in the branch, humic substances and indolebutyric acid in ‘Arbequina’ olive minicuttings

Contact Info

Product

Resources

About