PRODUCTION OF MINI-CUTTINGS AND THE INFLUENCE OF LEAF REDUCTION ON ROOTING OF VINHÁTICO (<i>Plathymenia foliolosa</i> Benth.)

Neubert, Victor de Freitas; Xavier, Aloísio; Paiva, Haroldo Nogueira de; Dias, Poliana Coqueiro; Gallo, Ricardo

doi:10.1590/1806-90882017000400002

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Articles • Rev. Árvore 41 (4) • 2017 • https://doi.org/10.1590/1806-90882017000400002 copy

PRODUCTION OF MINI-CUTTINGS AND THE INFLUENCE OF LEAF REDUCTION ON ROOTING OF VINHÁTICO (Plathymenia foliolosa Benth.)

PRODUÇÃO DE MINIESTACAS E O EFEITO DA REDUÇÃO FOLIAR NO ENRAIZAMENTO DE VINHÁTICO (Plathymenia foliolosa Benth.)

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The objective of this work was to evaluate the production and survival of the mini-stumps in mini-clonal hedge and the effect of leaf reduction of mini-cuttings on rooting and seedling growth of progenies of Vinhático (Plathymenia foliolosa) by mini-cutting. Apical mini-cuttings were used to evaluate the influence of leaf reduction on the rooting of vinhático; the mini-cuttings ranged between 8 to 10 cm in length and samples were subjected to100% leaf reduction (without leaf), 75% of leaf reduction, or no leaf reduction. As for the survival of mini-stumps in mini-clonal hedge, after the fourth successive mini-cuttings collection, P3 and P19 progenies showed the highest survival percentages (64.5% and 61.5%, respectively), while progenies P1 (32.3 %) and P45 (25%) showed the lowest values for this parameter. The average number of mini-cuttings/mini-stump/collection produced ranged from 0.83 (progeny 53) to 4.8 (progeny 01) and the average productivity was 120 m² mini-stumps/mini-cuttings per collection. These results suggest that leaf reduction in adventitious rooting in mini-cuttings did not result in any difference between foliar treatments without reduction and 75% leaf reduction; however, 100% mortality was observed when the mini-cuttings were made with total leaf reduction.The progenies studied showed potential regeneration of mini-stumps, thus allowing the realization of successive collections of young shoots.

Keywords:
Clonal forestry; Vegetative propagation; Cloning

Table 1 Survival of mini-stumps and number of mini-cuttings by mini-stumps of six progenies of Vinhático (Plathymenia foliolosa) due to successive collections.

Characteristics	Progenies	Collections
		1	2	3	4
	P01	100 aA*	46,28 bcB	32,29 bcB	32,29 bcB
Sob (%)	P03	100 aA	77,08 aB	64,58 aB	64,58 aB
	P19	100 aA	73,96 aB	61,46 aB	61,46 aB
	P21	100 aA	60,42 abB	48,96 abB	47,92 abB
	P45	100 aA	33,33 cB	25,00 cB	25,00 cB
	P53	100 aA	62,50 abB	52,08 abB	52,08 abB
	P01	1,66 aB	4,83 aA	2,38 aB	2,30 aB
	P03	1,25 aA	1,28 cA	1,62 aA	1,46 aA
N° Mini-cuttings	P19	1,03 aA	2,31 bcA	1,96 aA	2,23 aA
per mini-stumps	P21	1,25 aA	2,41 bcA	1,96aA	1,86 aA
	P45	1,25 aB	3,65 abA	2,42 aAB	1,60 aB
	P53	0,83 aC	3,00 bA	2,21 aAB	1,64 aBC

Table 2 Mean values of survival characteristics (Sob), roots observed at the bottom of the container (ROEIT), rooting (ER), root length (ComR), collar diameter (DC), number of roots (NR), and shoot dry mass (SDM) and root system (MSR) of six progenies Plathymenia foliolosa, greenhouse exit (CV) and full sun, depending on the leaf reduction.

Progeny	Greenhouse			Full sun
	Sob (%)	ROEIT (%)	Vigor	ComR	DC	NR	MSPA	MSR
P01	59,56 ab*	23,70 a	0,79 ab	3,58 b*	0,94 b	1,42 a	0,51 b	0,28 b
P03	58,52 ab	23,15 a	0,94 a	6,60 a	1,59 ab	2,62 a	1,51 a	0,7 ab
P19	65,92 a	15,31 ab	0,89 ab	5,27 ab	1,57 ab	1,84 a	1,00 ab	0,74 a
P21	61,49 ab	11,11 ab	0,80 ab	6,57 a	1,52 ab	3,11 a	1,18 ab	0,52 ab
P 4	51,49 ab	11,11 ab	0,76 ab	6,67 a	1,58 ab	3,19 a	0,67 b	0,37 ab
P53	48,88 b	7,41 b	0,61 b	6,67 a	1,67 a	2,89 a	0,76 ab	0,31 ab

Table 3 Survival (SOB), roots observed at the bottom of the container (ROEIT) and force six progenies Plathymenia foliolosa, greenhouse exit (CV), shade house (CS) depending on the leaf reduction.

Treatments	Greenhouse (60 days)			Shade House (75 days)
	Sob (%)	ROEIT (%)	Vigor	Sob (%)	ROEIT (%)	Vigor
Without Leaf	0,00 b*	0,00 b	0,00 b	0,00 b	0,00 b	0,00 b
Reduction75%	84,70 a	19,93 a	1,13 a	60,77 a	36,19 a	1,22 a
Whole Leaf	88,41 a	25,97 a	1,26 a	59,95 a	37,30 a	1,22 a

Table 4 Survival (SOB), roots observed at the bottom of the container (ROEIT), rooting (ER), height (H), root length (ComR), collar diameter (DC), number of roots (NR), and shoot dry mass (SDM) and root system (MSR) of six progenies Plathymenia foliolosa in open sun depending on the leaf reduction.

Treatments	Full sun (90 days)
Treatments	Sob(%)	ER(%)	Vigor	H(cm)	ComR(cm)	DC(mm)	NR	MSPA(g)	MSR(g)
Without Leaf	0,00b	0,00b	0,00 b	0,00 b	0,00 b	0,00 b	0,00 b	0,00 b	0,00 b
Reduction75%	31,02a	30,09a	1,05a	8,12a	8,61a	2,16a	3,72a	1,21a	0,73a
Whole Leaf	31,77a	31,39a	1,06a	8,23a	9,07a	2,28a	3,82a	1,61a	0,73a

Sociedade de Investigações Florestais Universidade Federal de Viçosa, CEP: 36570-900 - Viçosa - Minas Gerais - Brazil, Tel: (55 31) 3612-3959 - Viçosa - MG - Brazil
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