Indolebutyric acid ≥% (T); CAS Number: ; EC Number: 5; Synonym: 4-(3-Indolyl)butanoic acid, 4-(3-Indolyl)butyric acid, IBA; Linear.

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Adventitious rooting on the Brazilian red-cloak and sanchezia after application of indole-butyric and humic acids. Plant regulators, as well as bioactive fractions of the organic matter, can accelerate the development and increase the efficiency of adventitious rooting in ornamental plants. We evaluated rooting in the Brazilian red-cloak Megaskepasma erythrochlamys and sanchezia Sanchezia nobilis cuttings in response to application of indole-butyric acid IBA and humic acids HA.

Survival of cuttings, number of leaves and shoot and root fresh and dry matter were evaluated 45 days after. Data were used to run an analysis of variance. We observed the average contrasts, qcido the regression equations and estimated the concentrations that provided the best efficiency in terms of root dry matter. In sanchezia, HA at We concluded that IBA, in the abovementioned concentrations, increased adventitious rooting in cuttings of both the Brazilian red-cloak and sanchezia, while optimal doses of HA solutions are very likely to improve adventitious rooting in sanchezia, but not in the Brazilian red-cloak.

Megaskepasma erythrochlamys; Sanchezia nobilis; vegetative propagation; humic substances; auxins. The propagation by cuttings favors the quick and massive production of plantlets with complete fidelity to butirido mother plant. However, for the propagation process to be successful, it is important to achieve a high rate of rooting. The main factors that influence adventitious rooting in cuttings are related to the propagation material e. Growth regulators bjtirico the auxin type, kndol as the indole-butyric acid IBA accelerate the process of indkl rooting and make room for a vigorous development of plantlets in many species, including several ornamental plants Loss et al.

Nevertheless, IBA is an expensive inol reagent produced by specialized companies.

Ácido indol-3-acético

accido In addition, it presents toxicity to humans, causing skin irritation and eye and respiratory infection, if handled improperly Sigma-Aldrich, It is also toxic to the environment, particularly aquatic environments Sigma-Aldrich, Humic acids HAthe bioactive fraction of the organic matter after humification, also promotes adventitious rooting in cuttings of ornamental plants Baldotto et al.

HA are a renewable natural resource which can be extracted from different urban wastes such as garbage and sewage sludge Canellas et al. However, plant response to HA application is not uniform and varies with the raw material which these compounds where extracted from and their concentration, and plant genotype Baldotto et al. HA, the most stable reactive fraction of humic substances, have dark color and varied chemical structure, with high content of aromatic rings and carboxylic, phenolic and quinone functional groups Baldotto et al.

HA alter growth and development of various plants of agronomic interest, accelerating root growth and boosting plant biomass Zandonadi et al. We aimed to study the adventitious rooting of apical stem cuttings of Brazilian red-cloak and sanchezia plants in response to the application of different concentrations of IBA and HA. Cuttings were collected in September and standardized to cm length and two apical leaves cut crosswise in half.


Cuttings were placed in 50 mL plastic cups containing HA solutions for 24 hours Baldotto et al. Following, cuttings were transferred to wcido. The experimental units consisted inodl a five-cutting pot. The experiment was carried out in a randomized block design, with five replications, totaling experimental units. Forty-five days after, the following characteristics were assessed: Results were used to run an analysis of variance.

We also adjusted regression equations using the means of the characteristics studied and IBA and HA concentrations. The slopes of the regression equations were tested when presented coefficient of determination greater than 0. The regression equations were used to estimate the concentration of maximum physical efficiency for root dry matter as function of IBA and HA concentrations.

In this study we established the concentrations of indole-butyric acid IBA and humic acids HA that promoted butiricl and adventitious rooting of cuttings of the Brazilian red-cloak and sanchezia, aiming at speeding up and improving the efficiency of vegetative propagation in these species.

The application of mounting concentrations of IBA and HA significantly alter rooting performance and shoot growth in cuttings of the Brazilian red-cloak and sanchezia Tables 1 and 2. The same tables contain the average contrasts for qualitative data. Biomass accumulation in shoots in response to HA application in nursery material had already been reported for other species of agronomic interest such as pineapple Baldotto et al.

However, in eucalyptus there was no significant response Pinheiro et al. HA mode of action was not investigated in this work. However, other studies have suggested the existence of different mechanisms Zandonadi et al. It has been proposed that HA stimulate root growth in an auxin like manner, i. HA also act in the regulation of nutrient uptake Nardi et al.

Such mechanisms may explain the growth in shoot fresh and dry matter we observed in cuttings of the Brazilian red-cloak. IBA promoted increments in all traits in sanchezia Table 2.

IBA is a plant regulator with typical auxin hormonal action. It is commercially available in liquid and solid forms and it is used to stimulate adventitious root development, since it favors the formation of meristematic tissue and cell elongation Hartmann et al.

IBA efficiency in promoting adventitious rooting in cuttings of ornamental plants have been reported to allamanda Loss et al. Besides stimulating root formation, exogenous application of auxins also increases rooting speed and uniformity Hartmann et al. However, IBA is potentially harmful to health. It presents acute toxicity when ingested and cause irritation of skin, eyes and the respiratory tract if inhaled Sigma-Aldrich, Once the regression equations for plant growth characteristics as function of IBA and HA concentrations were obtained Table 3we calculated the concentrations of maximum physical efficiency for RDM for the Brazilian red-cloak and sanchezia Table 4.


In plants of the Brazilian red-cloak, maximum physical efficiency for RDM was achieved at As no effect of HA has been significant, HA should not be used in the Brazilian red-cloak to replace auxins. IBA, on its turn, resulted in significant increases in root growth, corroborating Ferriani et al.

In sanchezia, the maximum physical efficiency for MSR was achieved with These results allow the conclusion that HA can be an alternative to the use of synthetic auxin in sanchezia. There are several studies with horticultural crops such as the perennial ryegrass Silva et al.

These studies point to a potential new technological option for farmers, especially for those seeking a more sustainable agriculture, in which the use of synthetic inputs is reduced, while the recycling of organic waste is levered.

Our results indicate that the application of IBA and HA in apical cuttings of the Brazilian red-cloak and sanchezia, in the concentrations evaluated, accelerates plantlet production.

Ácido indolacético – Wikipedia, a enciclopedia libre

This result is relevant, since the efficiency of the vegetative propagation interferes on the production and commercialization of ornamental plants.

Panorama atual e perspectivas futuras da cadeia produtiva de flores tropicais: Revista Brasileira de Horticultura Ornamental Seed germination and seedling growth of tomato and lettuce as affected by vermicompost water extracts Teas.

Adventitious rooting in cuttings of croton and hibiscus in response to indolbutyric acid and humic acid. Gladiolus development in response to bulb treatment with different concentrations of humic acids.

Indolebutyric acid – Wikipedia

Root growth of Arabidopsis thaliana treated with humic acids isolated from typical soils of Rio de Janeiro state, Brazil. Global Science and Technology4: Mercado interno para os produtos da floricultura brasileira: Substratos e auxinas no enraizamento de estacas caulinares de espinheira-santa. Plantas ornamentais no Brasil: Acta Scientiarum Agronomy Physiological effects of humic substances in higher plants.

Soil Biology and Biochemistry Revista Brasileira de Zootecnia, Energization of transport processes in plants. Plant physiology as affected by humified organic matter. Theoretical and Experimental Plant Physiology This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Services on Demand Journal. Research Adventitious rooting on the Brazilian red-cloak and sanchezia after application of indole-butyric and humic acids. ABSTRACT Plant regulators, as well as bioactive fractions of the organic matter, can accelerate the development and increase the efficiency of adventitious rooting in ornamental plants.

May 31, ; Accepted: How to cite this article.