Atenuação do processo de lignificação em Eucalyptus grandis (Hill ex Maiden) por GA3 e BAP. / Atenuation of ligninification process in Eucalyptus grandis (Hill ex Maiden) by GA3 and BAP.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

This research was caried out to understand the behavior of growth regulators (giberelic acid (GA3) e 6-benzilaminopurin (BAP) on lignification system of Eucalyptus grandis (FORMER Hill Maiden). After GA3 (alone) and BAP (combined) applications, analyses were carried out. These regulators were applied by a atomization system at different concentrations levels. Anatomical analysis, including Mäule and Wiesner test as well as chemical analysis such as insoluble (Klason) and dioxane lignin were carried out as well. Infrared spectroscopy, methoxyl determination (Seizel Method) and total protein (kjedahl Method) were performed. Synergism was suggested for G[1]C[1] treatment, at following concentrations: 49,13 μM e 111 μM. These treatments decreasing around 20% of lignin. In spite of infrared spectra that showed G/S composition, lignin GS, HG were confirmed by methoxyl content, suggesting regulators action on lignin biosynthesis and lignin structural modification. Positive Mäule and Wiesner test were observed, while protein did not modified significatively.

ASSUNTO(S)

giberelic acid lignificação ácido giberélico 6-benzilaminopurina tecnologia e utilizacao de produtos florestais eucalyptus grandis growth regulators

ACESSO AO ARTIGO

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