Os insetos constituem uma das principais causas de danos à produção agrícola no mundo. O controle de insetos tem sido realizado por meio de agroquímicos e, em muito menor escala, pelo emprego de inseticidas biológicos. As plantas transgênicas resistentes a insetos representam uma nova alternativa no combate aos insetos-praga das lavouras. A bactéria entomopatogênica Bacillus thuringiensis Berlinier (Bt) é a fonte dos genes de resistência nas chamadas plantas-Bt, produzidas comercialmente. No presente trabalho de revisão, são abordados os aspectos relacionados à bactéria Bt como fonte de genes de resistência a insetos-pragas, plantas geneticamente modificadas, vantagens do uso de plantas-Bt, bem como perspectivas dessa ferramenta biotecnológica.
ABSTRACT. Ocimum basilicum L. (sweet basil), of the family Lamiaceae, is rich in aromatic essential oils and valuable for its pharmaceutical, aromatic and culinary properties. The present study describes the procedure for micropropagation of O. basilicum using cotiledonary leafs from in vitro geminated plants. Cotyledons from in vitro germinated seeds were used as initial explants, put in MS (Murashige and Skoog, 1962) ). Higher BAP concentrations induced an increase in the number of explants with shoots and a higher number of shoots/cotyledon.
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