Mini-cutting rooting and plantlet growth in <i>Erythrina crista-galli L</i>.

In this study, we evaluated the adventitious rooting competence of mini-cuttings and plantlet growth of two clones of swamp cork (Erythrina crista-galli L.). Experiments were carried out in a factorial of two clones to study the need of application of indolebutyric acid (IBA), substrate composition for mini-cutting rooting and plantlet growth, and rooting curves of the clones 15SM05 and 15SM08, in the completely randomized design. Mini-cuttings of swamp cork clones showed high rooting competence, with mean rooting percentage above 80% even without IBA application. Vermiculite and its combination with commercial substrate resulted in the highest percentage of rooting, and number and length of roots and shoots. The clones showed differences regarding their adventitious rooting competence and the increment in rooted mini-cuttings with time in a humidity chamber, being the clone 15SM05 the most suitable for plantlet production.

Keywords:
native species; vegetative propagation; substrate; plantlet quality

Authorship

Dilson Antônio Bisognin ^**Corresponding author: dilson.bisognin@ufsm.br

Universidade Federal de Santa Maria, Departamento de Fitotecnia, Santa Maria, Rio Grande do Sul, Brazil. dilson.bisognin@ufsm.brUniversidade Federal de Santa MariaBrazilSanta Maria, Rio Grande do Sul, BrazilUniversidade Federal de Santa Maria, Departamento de Fitotecnia, Santa Maria, Rio Grande do Sul, Brazil. dilson.bisognin@ufsm.br

http://orcid.org/0000-0002-4754-9661

Gabriel de Araujo Lopes

Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul. Brazil. lopes.gabriel376@gmail.com, angelcmalheiros@gmail.comUniversidade Federal de Santa MariaBrazilSanta Maria, Rio Grande do Sul, BrazilUniversidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul. Brazil. lopes.gabriel376@gmail.com, angelcmalheiros@gmail.com

Angélica Costa Malheiros

Renato Trevisan

Universidade Federal de Santa Maria, Colégio Politécnico, Santa Maria, Rio Grande do Sul, Brazil. renatrevisan@gmail.comUniversidade Federal de Santa MariaBrazilSanta Maria, Rio Grande do Sul, BrazilUniversidade Federal de Santa Maria, Colégio Politécnico, Santa Maria, Rio Grande do Sul, Brazil. renatrevisan@gmail.com

Kelen Haygert Lencina

Universidade Federal de Santa Catarina, Departamento de Agricultura, Biodiversidade e Florestas, Curitibanos, Santa Catarina, Brazil. kelen.lencina@ufsc.brUniversidade Federal de Santa CatarinaBrazilCuritibanos, Santa Catarina, BrazilUniversidade Federal de Santa Catarina, Departamento de Agricultura, Biodiversidade e Florestas, Curitibanos, Santa Catarina, Brazil. kelen.lencina@ufsc.br

*Corresponding author: dilson.bisognin@ufsm.br

This work is part of the second author's final course assignment.

The authors declare no conflict of interests

SCIMAGO INSTITUTIONS RANKINGS

Figures | Tables

Figures (2)
Tables (2)

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Figure 1:
Percentage of survival, number of leaves, shoot height (cm), stem diameter (mm), and shoot height:stem diameter ratio in plantlets of two clones of Erythrina crista-galli cultivated in different substrates for 120 days in the greenhouse. Treatments followed by the same letter did not significantly differ (p > 0.05) according to Tukey’s test. Substrates: combinations of a commercial substrate and vermiculite (CS+V 2:1 - v/v), the commercial substrate and soil from subsoil (CS+SS 1: 1 v/v) and the commercial substrate and soil from subsoil (CS+SS 2:1 v/v).

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Figure 2:
Daily current (DCI), daily mean (DMI) increments, and accumulated rooting (AR) of the percentage of rooting, and number and length of formed roots in mini-cuttings of two clones of Erythrina crista-galli cultivated in a humidity chamber for 42 days.

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Table 1:
Percentages of survival (S), rooting (R) and shooting (SH), number (NR) and length (LR) of roots, and number (NS) and length (LS) of shoots of mini-cuttings of two clones of Erythrina crista-galli treated with different concentrations of indolebutyric acid (IBA) and cultivated in a humidity chamber for 30 days

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Table 2:
Percentages of survival (S), rooting (R) and shooting (SH), number (NR) and length (LR) of roots, and number (NS) and length (LS) of shoots of mini-cuttings of two clones of Erythrina crista-galli cultivated in different substrates for 30 days in a humidity chamber

Figure 1: Percentage of survival, number of leaves, shoot height (cm), stem diameter (mm), and shoot height:stem diameter ratio in plantlets of two clones of Erythrina crista-galli cultivated in different substrates for 120 days in the greenhouse. Treatments followed by the same letter did not significantly differ (p > 0.05) according to Tukey’s test. Substrates: combinations of a commercial substrate and vermiculite (CS+V 2:1 - v/v), the commercial substrate and soil from subsoil (CS+SS 1: 1 v/v) and the commercial substrate and soil from subsoil (CS+SS 2:1 v/v).

Figure 2: Daily current (DCI), daily mean (DMI) increments, and accumulated rooting (AR) of the percentage of rooting, and number and length of formed roots in mini-cuttings of two clones of Erythrina crista-galli cultivated in a humidity chamber for 42 days.

Table 1: Percentages of survival (S), rooting (R) and shooting (SH), number (NR) and length (LR) of roots, and number (NS) and length (LS) of shoots of mini-cuttings of two clones of Erythrina crista-galli treated with different concentrations of indolebutyric acid (IBA) and cultivated in a humidity chamber for 30 days

Treatments	S (%)	R (%)	NR	LR (cm)	SH (%)	NS	LS (cm)
Clones
15SM05	92.5 a*	80.0 a	3.4 a	4.9 a	36.7 a	0.9 a	0.8 a
15SM08	88.3 a	81.7 a	3.9 a	3.6 b	5.0 b	0.3 b	0.2 b
IBA (mg L^-1)
0	96.7 a	85.0 ab	3.6 a	5.1 a	26.7 a	0.7 a	0.6 a
1000	98.3 a	95.0 a	3.3 a	4.1 a	25.0 a	0.7 a	0.5 a
2000	83.3 a	75.0 ab	3.7 a	4.3 a	21.7 a	0.5 a	0.4 a
3000	83.3 a	68.3 b	4.0 a	3.5 a	10.0 a	0.4 a	0.4 a
Mean	90.4	80.8	3.7	4.3	20.8	0.6	0.5
CV (%)	19.3	24.6	12.6	17.8	67.5	21.0	19.8

* Treatments followed by the same letter did not significantly differ (p > 0.05) according to Tukey’s test. CV = coefficient of variation.

Table 2: Percentages of survival (S), rooting (R) and shooting (SH), number (NR) and length (LR) of roots, and number (NS) and length (LS) of shoots of mini-cuttings of two clones of Erythrina crista-galli cultivated in different substrates for 30 days in a humidity chamber

Treatments	S (%)	R (%)	NR	LR (cm)	SH (%)	NS	LS (cm)
Clones
15SM05	99.1 a*	83.0 a	4.4 a	3.9 a	67.0 a	1.0 a	0.8 a
15SM08	94.6 a	78.9 a	3.1 b	2.9 b	25.9 b	0.4 b	0.1 b
Substrates
CS	98.2 a	82.1 ab	3.1 b	2.7 b	73.2 a	0.9 a	0.5 a
S	92.9 a	69.1 b	3.3 b	2.5 b	23.2 c	0.5 b	0.3 a
V	98.2 a	96.4 a	5.1 a	4.5 a	48.2 b	0.6 ab	0.6 a
CS+V	98.2 a	76.2 b	3.5 b	4.1 a	41.1 bc	0.6 ab	0.4 a
Mean	96.9	81.0	3.8	3.4	46.4	0.7	0.5
CV (%)	12.0	24.0	13.4	17.6	47.7	16.5	16.4

* Treatments followed by the same letter did not significantly differ (p > 0.05) according to Tukey’s test. Substrates: CS = commercial substrate; S = coarse sand; V = expanded vermiculite; CS+V (2:1 v/v) = combinations of the commercial substrate with vermiculite.

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