Indolebutyric acid in “pulse” treatment on the rooting of <i>Luehea divaricata</i> minicuttings

Silva, Karol Buuron da; Reiniger, Lia Rejane Silveira; Rabaiolli, Silvia Machado dos Santos; Stefanel, Charlene Moro; Silva, Leandro Dutra da

doi:10.1590/0103-8478cr20180288

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FORESTRY SCIENCE • Cienc. Rural 49 (12) • 2019 • https://doi.org/10.1590/0103-8478cr20180288 copy

Indolebutyric acid in “pulse” treatment on the rooting of Luehea divaricata minicuttings

Ácido indolbutírico em tratamento “pulse” sobre o enraizamento de miniestacas de Luehea divaricata

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT:

The objective of the present research was to evaluate the effect of different concentrations of indolebutyric acid (IBA) on the rooting of Luehea divaricata minicuttings under two different cultivation periods in a greenhouse environment. The minicuttings were immersed in a hydroethanolic solution containing IBA. All minicuttings survived after 30 and 60 days of cultivation. Root formation at 30 days of cultivation with 1000 mg L^-1 of IBA was 91.7%, the same rate as that observed with 4000 mg L^-1. At the 1000 mg L^-1 concentration, the number of roots was the greatest among all treatments, with 8.42 roots per minicutting after 30 days of cultivation. After 30 days of cultivation, the formation and number of roots with the use of 1000 mg L^-1 of IBA in the “pulse” treatment produced the best outcome results, allowing the plants to spend less time in a greenhouse at a reduced concentration of auxin when compared with other treatments. However, to obtain higher averages of secondary root formation, root length, and number of leaves, it is necessary to increase the cultivation period to 60 days.

Key words:
minicutting technique; IBA; auxin,vegetative propagation

Authorship

Karol Buuron da Silva

Programa de Pós-graduação em Engenharia Florestal, Universidade Federal de Santa Maria (UFSM), 97105-900, Santa Maria, RS, Brasil. Universidade Federal de Santa Maria (UFSM)BrazilSanta Maria, RS, BrazilPrograma de Pós-graduação em Engenharia Florestal, Universidade Federal de Santa Maria (UFSM), 97105-900, Santa Maria, RS, Brasil.

https://orcid.org/0000-0003-2174-2663

Lia Rejane Silveira Reiniger ^*E-mail: liarsr@ufsm.br. *Corresponding author

https://orcid.org/0000-0002-3243-671X

Silvia Machado dos Santos Rabaiolli

https://orcid.org/0000-0003-1331-8803

Charlene Moro Stefanel

https://orcid.org/0000-0002-3173-8150

Leandro Dutra da Silva

Curso de Engenharia Florestal, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brasil.Universidade Federal de Santa Maria (UFSM)BrazilSanta Maria, RS, BrazilCurso de Engenharia Florestal, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brasil.

https://orcid.org/0000-0002-6149-2737

E-mail: liarsr@ufsm.br. ^*Corresponding author

DECLARATION OF CONFLICT OF INTERESTS

The authors declare that they have no conflict of interest. The founding sponsors had no role in the design of the study, nor in the data collection, analyses, or interpretation of data, the writing of the manuscript, nor the decision to publish the results.

AUTHORS’ CONTRIBUTIONS

All authors contributed equally for the conception and writing of the manuscript. All authors critically revised the manuscript and approved of the final version.

SCIMAGO INSTITUTIONS RANKINGS

Figures | Tables

Figures (1)
Tables (3)

Thumbnail

Figure 1 -
Illustrative representation of the minicuttings of Luehea divaricata Mart. & Zucc. which were subjected to “pulse” treatment for 10s in hydroethanolic solution (50% ethanol, 50% distilled water, v/v) of indolebutyric acid - IBA (0; 1000; 2000 or 4000 mg L^-1), after 60 days. A) 0 mg L^-1; B) 1000 mg L^-1; C) 2000 mg L^-1 and D) 4000 mg L^-1. Source: Authors (2017).

Thumbnail

Table 1
Root formation (%) and number of roots in Luehea divaricata Mart. & Zucc. minicuttings as a function of the interaction between concentrations of Indolbutiric acid - IBA (0, 1000, 2000 or 4000 mg L^-1) of hydroethanolic solutions (50% ethanol, 50% distilled water, v/v) where they were previously immersed for 10s, and the cultivation period (30 or 60 days). Santa Maria, RS, UFSM, 2017.

Thumbnail

Table 2
Average root length (cm), presence of secondary roots (%) and presence of callus (%) in minicuttings of Luehea divaricata Mart. & Zucc. as a function of concentrations of Indolbutiric acid - IBA (0, 1000, 2000 or 4000 mg L^-1) of hydroethanolic solutions (50% ethanol, 50% distilled water, v/v) in which they were previously immersed for 10s regardless of the cultivation period (30 or 60 days). Santa Maria, RS, UFSM, 2017.

Thumbnail

Table 3
- Averages of root length (cm), presence of secondary roots (%) and number of leaves in minicuttings of Luehea divaricata Mart. & Zucc. depending on the cultivation period (30 or 60 days), regardless of the concentration of the hydroethanolic solution (50% ethanol, 50% distilled water, v/v) of Indolbutiric acid - IBA (0, 1000, 2000 or 4000 mg L^-1), in which they were previously immersed for 10s. Santa Maria, RS, UFSM, 2017.

Figure 1 - Illustrative representation of the minicuttings of Luehea divaricata Mart. & Zucc. which were subjected to “pulse” treatment for 10s in hydroethanolic solution (50% ethanol, 50% distilled water, v/v) of indolebutyric acid - IBA (0; 1000; 2000 or 4000 mg L^-1), after 60 days. A) 0 mg L^-1; B) 1000 mg L^-1; C) 2000 mg L^-1 and D) 4000 mg L^-1. Source: Authors (2017).

Table 1 Root formation (%) and number of roots in Luehea divaricata Mart. & Zucc. minicuttings as a function of the interaction between concentrations of Indolbutiric acid - IBA (0, 1000, 2000 or 4000 mg L^-1) of hydroethanolic solutions (50% ethanol, 50% distilled water, v/v) where they were previously immersed for 10s, and the cultivation period (30 or 60 days). Santa Maria, RS, UFSM, 2017.

IBA (mg L^-1)	---------------------Root formation (%)-------------------		----------------------Number of roots----------------------
	30 days	60 days	30 days	60 days
0	25.00 B c^*	100.00 A a	2.33 A b	6.10 A a
1000	91.70 A a	100.00 A a	8.42 A a	10.58 A a
2000	58.34 B b	91.70 A a	6.34 A a	6.34 A a
4000	91.70 A a	100.00 A a	6.16 B a	11.58 A a
AVERAGE	66.68	97.92	5.81	8.65
IV^**	3.95		11.40

^*Averages followed by the same lowercase letter in the columns, and uppercase in lines, do not differ significantly by the Tukey test at the 5% error probability level. ^** Index of variation (IV), calculated by CV/√N CV/√N, where IV is equal to coefficient of variation (CV) divided by the square root of the number of repetitions (N). Source: Authors (2017).

Table 2 Average root length (cm), presence of secondary roots (%) and presence of callus (%) in minicuttings of Luehea divaricata Mart. & Zucc. as a function of concentrations of Indolbutiric acid - IBA (0, 1000, 2000 or 4000 mg L^-1) of hydroethanolic solutions (50% ethanol, 50% distilled water, v/v) in which they were previously immersed for 10s regardless of the cultivation period (30 or 60 days). Santa Maria, RS, UFSM, 2017.

IBA (mg L^-1)	Root length (cm)	Secondary roots (%)	Callus (%)
0 1000 2000 4000	7.71 b^* 11.66 a 7.96 b 11.12 a	37.50 b 62.50 ab 45.83 ab 66.67 a	95.83 a 95.83 a 54.10 b 83.34 a
AVERAGE IV**	9.61 9.24	53.12 5.36	82.27 4.61

^*Averages followed by the same letter in the columns do not differ significantly by the Tukey test at the 5% error probability level. ^** Index of variation (IV), calculated by CV/√N CV/√N, where IV is equal to coefficient of variation (CV) divided by the square root of the number of repetitions (N). Source: Authors (2017).

Table 3 - Averages of root length (cm), presence of secondary roots (%) and number of leaves in minicuttings of Luehea divaricata Mart. & Zucc. depending on the cultivation period (30 or 60 days), regardless of the concentration of the hydroethanolic solution (50% ethanol, 50% distilled water, v/v) of Indolbutiric acid - IBA (0, 1000, 2000 or 4000 mg L^-1), in which they were previously immersed for 10s. Santa Maria, RS, UFSM, 2017.

Period (days)	Root length(cm)	Secondary roots (%)	Number of leaves
30	4.40 b	18.75 b	0.21 b
60	14.80 a	87.50 a	3.50 a
AVERAGE	9.6	53.1	1.8
IV	9.24	5.36	12.17

^*Averages followed by the same letter in the columns do not differ significantly by the Tukey test at the 5% error probability level. ^** Index of variation (IV), calculated by CV/√N, where IV is equal to coefficient of variation (CV) divided by the square root of the number of repetitions (N). Source: Authors (2017).

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Universidade Federal de Santa Maria Universidade Federal de Santa Maria, Centro de Ciências Rurais , 97105-900 Santa Maria RS Brazil , Tel.: +55 55 3220-8698 , Fax: +55 55 3220-8695 - Santa Maria - RS - Brazil
E-mail: cienciarural@mail.ufsm.br

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Indolebutyric acid in “pulse” treatment on the rooting of <i>Luehea divaricata</i> minicuttings

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[1] E-mail: liarsr@ufsm.br. ^*Corresponding author