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Effect of subsrate and luminosity on the germination of Anadenanthera colubrina (Fabaceae, Mimosoideae)

Angico (Anadenanthera colubrina (Vell.) Brenan var. cebil (Griseb.) Altschul) is a fast growing Mimosaceae, widely distributed in South America, used for production of tannin, wood, honey, resin, besides being ornamental and medicinal. The objective of this work was to analyze the germination of seeds coming from populations of a same species from two sites with different climates. Germinability (%G), average time (t) and germination velocity index (GVI) were studied in germination chambers at 30 ± 1ºC and nurseries with different types of substrates and luminosities. Total luminosity provided the lowest germination index, longest average time and lowest germination velocity index in all tested substrates. The most suitable luminosities are 30% of light for the sand substrate and 50% of light for the natural substrate. The population from the municipality of Tanquinho - BA was shown more adapted for establishment in field, for its vigor, taking advantage of favorable conditions to the subsequent development. These distinct germinative behaviors suggest adaptation to the different habitats in which they occur, contributing to the species ecological and evolutionary success .

Germinability; substrate; luminosity; vigorous; ecophysiology


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