QUANTIFICATION OF TANNINS IN Anadenanthera colubrina (Vell.) Brenan SEEDLINGS AND ITS RELATIONSHIP WITH ENVIRONMENTAL AND AGRONOMIC VARIABLES

Abstract

Background: Anadenanthera colubrina (Vell.) Brenan, commonly known as angico, is a species of high socioeconomic and environmental value, distinguished by its high concentration of tannins in various plant parts. This study aimed to co-validate the quantification method of tannins and associate their quantification with data on the development of young specimens of Anadenanthera colubrina (Vell.) Brenan from different environments. Seeds were collected in two areas in the Western Cariri of Paraíba. Plants were evaluated regarding their height, diameter, fresh and dry mass, and tannin quantification 90 days after emergence. Partial validation was performed in accordance with current Brazilian legislation.

Results: Regarding the development data, only height was statistically different between the study areas, and the specimens from Sumé were the highest (73.6 cm) ones. The tannin quantification method proved to be selective, linear, accurate, and robust, with analytical reliability in the quality control of the plant drug the of part aerea. Principal component analysis justified 79.3% of the data, evidencing the efficiency of the adopted model. Two main groups were formed, in which biomass and diameter data were associated with specimens of matrices from Serra Branca, whereas specimens from Sumé were more related to tannin production and plant height.

Conclusion: This set of data contributes to the sustainable use of the species and is promising in the innovation and technological development of sustainable products based on raw materials rich in tannins from A. colubrina.