STORAGE TIME EFFECT ON MINI-CUTTINGS ROOTING IN <i>Tectona grandis</i> LINN F. CLONES

Badilla, Yorleny; Xavier, Aloisio; Gamboa, Olman Murillo

doi:10.1590/1806-90882017000300003

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Articles • Rev. Árvore 41 (3) • 2017 • https://doi.org/10.1590/1806-90882017000300003 copy

STORAGE TIME EFFECT ON MINI-CUTTINGS ROOTING IN Tectona grandis LINN F. CLONES

INFLUÊNCIA DO TEMPO DE ARMAZENAMENTO NO ENRAIZAMENTO DE MINIESTACAS DE CLONES DE Tectona grandis LINN F.

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The study aimed to evaluate the influence of storage length on Tectona grandis mini-cuttings survival and rooting. A factorial arrangement (4 x 7) was utilized, based on four clones (Carapá, Ipê, GU5 and TB7) and seven time intervals from mini-cuttings harvesting until final sowing (0, 1, 2, 4, 8, 12 and 16 hours). A randomized block design with three replicates and 16 mini-cuttings per experimental unit was utilized. Survival and rooting rates were evaluated after greenhouse culture (30 days after sowing) and after shadow house culture (40 days after sowing); as well as height, collar diameter, aerial and root biomass 55 days after sowing. No significant differences were observed in survival and rooting rates among time intervals in teak mini-cuttings preparation from these four clones. However differences among clones were registered for rooting rate, suggesting a genotypic effect. Survival and rooting rates were very high after greenhouse culture (93% and 90% respectively), as well as survival after culture in a shadow-house (88%).

Keywords:
vegetative propagation; clonal forestry; teak

Table 1 Summary of variance analyses on survival (SCV) and rooting (ENR) after greenhouse period, as well as survival after shadowhouse period (SCS), as a response to storage of minicuttings after harvest/preparation, from four Tectona grandis clones.

Source of	DF	SCV (%)			ENR (%)			SCS (%)
Variation		Mean square	F	P	Mean square	F	P	Mean square	F	P
Clone (C )	3	200.27	4.91	0.0115^** ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	344.12	5.86	0.0057^*** ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	321.18	3.91	0.0259^** ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.
Treat. (T)	5	105.25	2.58	0.0554^ns ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	148.03	2.52	0.0599^ns ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	117.65	1.43	0.2564^ns ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.
(C) ^* ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test. (T)	15	40.76	0.83	0.6582^ns ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	58.748	0.88	0.5991^ns ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	82.10	1.45	0.1463^ns ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.
Mean			92.71			90.03			88.09
CV _exp (%)			7.56			9.05			8.53

Table 2 Summary of variance analyses for heigth (h) and collar diameter (dc), as a response function of minicuttings storage after harvest/preparation, from four Tectona grandis clones after 55 days-age.

Source of	DF	h (cm)			dc (mm)
variation		Mean square	F	P	Mean square	F	P
Clone ( C)	3	68.119	21.21	<.0001^** ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	0.956	12.31	0.0001^** ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.
Treat (T)	6	0.658	0.20	0.9707 ^ns ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	0.03	0.5	0.8016^ns ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.
(C )^* ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test. (T)	18	3.210	1.31	0.2196^ns ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	0.077	1.15	0.335^ns ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.
Mean		10.9				3.68
CV (%) exp.		14.36				7.06

Table 3 Summary of variance analyses on biomass (PPA) and root system (PSR), as a response function of minicuttings storage after harvest/preparation, from four Tectona grandis clones after 55 days-age.

Source of	DF	PPA (g)			PSR (g)
variation		Mean square	F	P<0.05	Mean square	F	P
Clone ( C)	3	0.318	6.74	0.0031^** ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	0.015	1.43	0.267^ns ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.
Trat (T)	6	0.085	1.81	0.1531^ns ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	0.006	0.63	0.7076^ns ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.
(C )^* ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test. (T)	18	0.047	1.18	0.3133^ns ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	0.01	0.6	0.8835^ns ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.
Média	1.09				1.04
CV _exp. (%)	18.25				12.73

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