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Embryogenic cultures of Araucaria angustifolia were established in a BM liquid medium supplemented with 2 µM 2,4-dichlorophenoxyacetic acid, 1 µM 6-benzylaminopurine and 1 µM kinetin (BM2) and in a BM medium free of growth regulators (BM0). During 42 days in culture, the cell growth pattern of both cultures was similar. The pH of the culture medium of both BM0 and BM2 underwent progressive reduction during culture time. For both the embryogenic cultures a preferential uptake of glucose in the late stages of cell growth kinetics was observed. The extracellular protein content was similar for both the embryogenic cultures. Acetocarmine and Evan's blue double stain showed major differences for early somatic embryo organisation, in which only the embryogenic culture grown in a liquid culture medium free of plant growth regulators showed the presence of bipolar somatic pro-embryos. Culturas embriogênicas de Araucaria angustifolia foram estabelecidas em meio de cultura líquido BM suplementado com 2 µM Ácido 2,4 Diclorofenoxiacético, 1 µM 6-Benzilaminopurina e 1 µM Cinetina (BM2) e em meio BM isento de reguladores de crescimento (BM0). Durante 42 dias de cultivo, o padrão de crescimento celular em ambas as culturas foi similar. O pH do meio de cultura BM0 e BM2 sofreu uma progressiva redução durante o período de cultivo. Em ambas as culturas embriogênicas foram observadas um consumo preferencial de glicose no período final da curva de crescimento celular. O nível de proteínas extracelulares foi similar para ambas as culturas embriogênicas. A dupla coloração com carmin acético e azul de Evans revelou diferenças na organização das linhagens celulares embriogênicas, sendo que a presença de proembriões somáticos bipolares foi apenas evidenciada nas culturas embriogênicas mantidas em meio de cultura líquido sem reguladores de crescimento

Biochemical and morphological changes during the growth kinetics of Araucaria angustifolia suspension cultures