Abstract
ABSTRACT Leaf piece explants of five Brassica juncea (L.) Czern. cultivars were transformed with an Agrobacterium tumefaciens strain EHA105 harboring the plasmid pCAM-BIA1301, which contains the β-glucuronidase (uidA) and hygromycin phosphotransferase (hpt) genes under the control of cauliflower mosaic virus 35S (CaMV35S) promoter. Transgenic plants were regenerated on Murashige and Skoog (MS) medium fortified with 8.87 μM 6-benzylaminopurine, 0.22 μM 2,4-dichlorophenoxyacetic acid, and 20 μM silver nitrate in the presence of 30 mg/l hygromycin. When co-culture took place in the presence of 100 μM acetosyringone, the efficiency of stable transformation was found to be approximately 19% in the T0 generation, with the transgenic plants and their progeny showing constitutive GUS expression in different plant organs. Southern blot hybridization of uidA and hpt genes confirmed transgene integration within the genome of transformed plants of each cultivar. Inheritance of hpt gene for single copy T-DNA inserts s...
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