Abstract
Introduction of foreign genes into plant tissues via Agrobacterium tumefaciens based vectors requires specific knowledge of Agrobacterium-host compatibility. Therefore, to develop a transformation protocol for peanut (Arachis hypogaea L.), five Brazilian cultivars were screened with four wild-type A.tumefaciens strains. Successful transformation was dependent on specific bacterial strain-plant cultivar interactions and strain A281 was the most effective for tumor induction. Tumors displayed hormone autonomous growth, were opine positive and contained DNA that was homologous to the T-DNA of the inciting strain. Tumors induced on seed and seedling explants by A281 (pTD02) also expressed the reporter genes gus and npt-II contained in the binary vector. These results show that peanut is a permissive host for the acceptance of genes from specific A.tumefaciens gene vectors.
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