Plant Pathology Journal1812-53871812-5425Asian Network for Scientific Information10.3923/ppj.2007.271.282Agrobacterium-mediated Transformation System]]>MaziahM. SariahM. SreeramananS. 4200764A soybean endo β-1,3-glucanase gene (pROKla-Eg) multiplied in Agrobacterium strain LBA 4404, was simultaneously introduced into single buds of in vitro grown banana cultivar, Rastali (AAB). Plasmid pROKla-Eg contained a neomycin phosphotransferase gene (npt 11) as the selectable marker to identify the transformants. Treatment A contained kanamycin at 100 mg L-1 and treatment B contained geneticin G-418 at 50 mg L-1 in both MS medium supplemented 5 mg L-1 of BAP together with 2.7 g of gelrite agar. Single buds derived from multiple bud clumps (Mbcs), were the target explants for transformation. An assay was performed to identify the minimum concentration required for two antibiotics (carbenicillin and cefotaxime) that is most effective against Agrobacterium strains, LBA 4404 and the effect on tissue regeneration capacity. Even though the transformation frequency based on kanamycin selection medium (treatment A) is higher, but there is no transformant could be confirmed based on PCR and Southern blot analyses, as compared using geneticin G-418 selection medium (treatment B). These results suggested that using geneticin G-418 as selection agent is preferably than kanamycin due to lower concentration required to allow for the small numbers of putative transgenic cells in a large population of non-transformed ones to undergo multiplication and also reduced the occurrence of escapes. The transgenic banana plantlets were inoculated with 2x106 spores mL-1 conidial suspension of Fusarium oxysporum f. sp. cubense (Race 1) to evaluate the degree of tolerance and to investigate the effectiveness of the bioassay system as a potential tool for early screening. Assay of protein extract from the transgenic plantlets showed an significantly increased in β-1,3-glucanase enzymes activity over the untransformed plantlets. The present of Agrobacterium-mediated transformation reported here is suitable for using tiny meristem tissues to obtain fungal disease tolerant or resistant banana through genetic engineering.]]>Anfoka, G. and H. Buchenauer,1997Phytophthora infestans by pre-inoculation with tobacco necrosis virus.]]>5085101Anguelova, V.S., A. Van der Westhuizen and Z.A. Pretorius,1999106393401Antunez-de-Mayolo, G., S.N. Maximova, S. Pishak and M.J. Guiltinan,2003Theobroma cacao somatic embryogenesis.]]>164607615Bean, S.J., P.S. Gooding, P.M. Mullineaux and D.R. 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