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RESUMO O Anacardium othonianum Rizz. e uma planta tipica de regioes de clima tropical caracterizada pela aparencia exotica e aroma agradavel. Na busca de diversificar a producao e atividades que proporcione maior rentabilidade, a micropropagacao tem sido uma alternativa para producao em grande escala em curto espaco de tempo. Por isso, objetivou-se com este trabalho determinar as melhores condicoes in vitro para micropropagacao dessa especie, para isso, avaliamos a adicao de diferentes concentracoes de AIB (Acido Indolbutirico), sacarose e carvao ativado no meio de cultivo in vitro. Foram utilizadas cinco concentracoes de AIB (0; 1; 2; 3; 4 mg L-1) e cinco concentracoes de sacarose (0, 15, 30, 45, 60 g L-1) na ausencia ou presenca de carvao ativado (2 g L-1), em meio WPM 50%. Aos 30 e 60 dias foram feitas avaliacoes do numero de explantes oxidados, comprimento medio e numero de folhas por explante. Verificou-se que o meio de cultivo suplementado com carvao ativado e a adicao de 4 mg L-1 de AIB, contribuiu para a o crescimento de raizes in vitro da especie. Enquanto, que o meio de cultivo com 30 g sacarose e presenca de carvao ativado proporcionou maior comprimento dos explantes e maior numero de folhas. Palavras-chave: Frutifera nativa, cerrado, micropropagacao. ABSTRACT The Anacardium othonianum Rizz. It’s a typical plant of regions of tropical climate characterized by the exotic appearance and pleasant aroma. In the quest to diversify production and activities that provide greatest profitability, micropropagation has been an alternative for large-scale production in short time. Therefore, the objective of this work is to determine the best in vitro results for micropropagation of this species, for this, we evaluated the addition of different concentrations of AIB (Indolbutyric Acid), sucrose and activated charcoal in the in vitro culture medium. Five concentrations of AIB (0, 1, 2, 3, 4 mg L-1) and five sucrose concentrations (0, 15, 30, 45, 60 g L-1) were used in the absence or presence of activated charcoal, in WPM 50% medium. At 30 and 60 days, the number of oxidation, average length and number of leaves per explant were evaluated. It was found that the culture medium supplemented with activated charcoal and an addition of 4 mg L-1 of IBA, contributed to in vitro root growth. While the culture medium with 30 g L-1 sucrose and the presence of activated charcoal provided a longer length of the explants and a larger number of leaves. Key words: Native Fruit, Cerrado, Micropropagation.

revista científic@

Composição do meio de cultivo para produção de microplantas de caju-de-árvore-do-Cerrado (Anacardium othonianum RIZZ.) - Composition of the cultivation medium for the production of microplants of Cerrado-tree cashew (Anacardium othonianum RIZZ.)