RELATIONSHIP BETWEEN LIGNIN CONTENT AND QUALITY OF <b>Pinus taeda</b> SEEDLINGS<sup>1</sup>

Dranski, João Alexandre Lopes; Malavasi, Ubirajara Contro; Malavasi, Marlene de Matos

doi:10.1590/0100-67622015000500013

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Article • Rev. Árvore 39 (5) • Oct 2015 • https://doi.org/10.1590/0100-67622015000500013 copy

RELATIONSHIP BETWEEN LIGNIN CONTENT AND QUALITY OF Pinus taeda SEEDLINGS¹

RELAÇÃO ENTRE TEOR DE LIGNINA E QUALIDADE DE MUDAS DE Pinus taeda

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The essay objective was to correlate lignin content resulting from tigmomorphogenesis induced by stem swaying with survival and post-planting growth of P. taeda seedlings. Seedlings were subjected to daily frequencies (0, 5, 10, 20 and 40 movements) of stem swaying for 60 days. By the end of the treatments, we determined lignin content of below and aboveground seedling tissues. Four replicates per treatment were planted in a area cultivated with pines. Ninety days after planting, survival and increments of seedling height, stem diameter and stem volume were quantified. Application of 20 stem swayings increased lignin in both below and aboveground plant tissues. Outplanted seedling survival was reduced with 40 stem swayings while growth increments were increased with both 10 and 20 stem swayings. Lignin content from belowground plant tissues was positively correlated with outplanted seedling survival while lignin from aboveground tissues correlated with height and stem volume increments. P. taeda seedlings with higher lignin content have higher survival chances after planting.

Keywords:
Thigmomorphogenesis; Hardening; Stem swaying

Table 1 Soil chemical properties of the experimental area

Depth	OMg	AP mg	Cation exchange (cmol_c dm^-3)						BS%	ASP %	pH CaCL₂
cm	dm^-3	dm^-3	K+	Mg²⁺	Ca²	Al³⁺	H+Al	CEC	BS%	ASP %	pH CaCL₂
0-20	20.51	6.85	0.35	1.29	2.07	0.55	6.70	10.41	35.64	12.91	4.60
20-40	12.30	0.94	0.10	0.55	0.88	0.95	7.90	9.43	16.22	38.31	3.80

Table 2 Simple (R) and partial (r) correlation coefficients between lignin content in bellow and aboveground plant tissues with attributes quantified at 90 days after planting of the P. taeda seedlings submitted to daily frequencies of stem swaying for 60 days

Attributes	Lignin in the below tissues		Lignin in the above tissues
Attributes	R	r (partial)	R	r (partial)
Survival	0.95^ ,*, ns Significant to 1%, 5% and not significant by t test.	0.98^ ,*, ns Significant to 1%, 5% and not significant by t test.	0.08 ^ns *,, ns Significant to 1%, 5% and not significant by t test.	-0.66^ns *,, ns Significant to 1%, 5% and not significant by t test.
Height	0.06^ns *,, ns Significant to 1%, 5% and not significant by t test.	-0.72^ns *,, ns Significant to 1%, 5% and not significant by t test.	0.93^ ,*, ns Significant to 1%, 5% and not significant by t test.	0.97^ ,*, ns Significant to 1%, 5% and not significant by t test.
Stem diameter	0.42^ns *,, ns Significant to 1%, 5% and not significant by t test.	0.27^ns *,, ns Significant to 1%, 5% and not significant by t test.	0.75^ns *,, ns Significant to 1%, 5% and not significant by t test.	0.72 ^ns *,, ns Significant to 1%, 5% and not significant by t test.
Stem volume	0.54 ^ns *,, ns Significant to 1%, 5% and not significant by t test.	0.55 ^ns *,, ns Significant to 1%, 5% and not significant by t test.	0.88^ ,*, ns Significant to 1%, 5% and not significant by t test.	0.89^ ,*, ns Significant to 1%, 5% and not significant by t test.

Sociedade de Investigações Florestais Universidade Federal de Viçosa, CEP: 36570-900 - Viçosa - Minas Gerais - Brazil, Tel: (55 31) 3612-3959 - Viçosa - MG - Brazil
E-mail: rarvore@sif.org.br

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[TFN01] Wherein: (OM) Organic matter; (AP) Available phosphate; (CEC) Cation exchange capacity; (BS) Base saturation percentage;(ASP) Aluminium saturation percentage.

Attributes	Lignin in the below tissues		Lignin in the above tissues
Attributes	R	r (partial)	R	r (partial)
Survival	0.95^ ,*, ns Significant to 1%, 5% and not significant by t test.	0.98^ ,*, ns Significant to 1%, 5% and not significant by t test.	0.08 ^ns *,, ns Significant to 1%, 5% and not significant by t test.	-0.66^ns *,, ns Significant to 1%, 5% and not significant by t test.
Height	0.06^ns *,, ns Significant to 1%, 5% and not significant by t test.	-0.72^ns *,, ns Significant to 1%, 5% and not significant by t test.	0.93^ ,*, ns Significant to 1%, 5% and not significant by t test.	0.97^ ,*, ns Significant to 1%, 5% and not significant by t test.
Stem diameter	0.42^ns *,, ns Significant to 1%, 5% and not significant by t test.	0.27^ns *,, ns Significant to 1%, 5% and not significant by t test.	0.75^ns *,, ns Significant to 1%, 5% and not significant by t test.	0.72 ^ns *,, ns Significant to 1%, 5% and not significant by t test.
Stem volume	0.54 ^ns *,, ns Significant to 1%, 5% and not significant by t test.	0.55 ^ns *,, ns Significant to 1%, 5% and not significant by t test.	0.88^ ,*, ns Significant to 1%, 5% and not significant by t test.	0.89^ ,*, ns Significant to 1%, 5% and not significant by t test.

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RELATIONSHIP BETWEEN LIGNIN CONTENT AND QUALITY OF Pinus taeda SEEDLINGS1

RELAÇÃO ENTRE TEOR DE LIGNINA E QUALIDADE DE MUDAS DE Pinus taeda

ABSTRACT

RELATIONSHIP BETWEEN LIGNIN CONTENT AND QUALITY OF Pinus taeda SEEDLINGS¹