GENETIC TRANSFORMATION OF COMMON BEANS (Phaseolus vulgaris L.) CALLI BY BIOLISTIC GUN AND VIA Agrobacterium tumefaciens
Year: 2013
Type: article
Abstract: Common bean is one of the most recalcitrant species for in vitro manipulation and transformation. In this study efficient genetic transformation methods were developed and performed in commercialized bean varieties calli by utilized microparticle bombardment (direct biolistic gun) and indirect A. tumefaciens-based technique. Hypocotyl segments cultured on Gamborgs medium supplemented with 1 mg l-l kinetin and 2 mg l-l 2,4-dichlorophenoxy acetic acid proved the best for callus induction and maintenance. Co-transformed calli were double selected on selective medium using 150 mg l-l kanamycin and 0.8 mol l-l mannitol. Transient genes expressions were obtained in calli cells and the results showed that the cells shot by biolistic DNA delivery method can be transformed to get kanamycin resistant and mannitol tolerant. The presence and integration of the neomycin phosphotransferase II (npt II) and osmosis protector mannitol-1-phosphate dehydrogenase (mtlD) genes into P. vulgaris L. genome were confirmed and verified by double selection tests. Transgenic calli were selected after co-cultivated with Agrobacterium method on selective medium containing 5 mg l-l phosphinotricin (PPT). Transient genes expressions were obtained in the calli and the results showed that the common beans calli co-cultivated with Agrobacterium can be transformed to get phosphinotricin resistant and β-glucuronidase reporter positive tissues. The presence and integration of the phosphinotricin acetyl transferase and β-glucuronidase genes into P. vulgaris L. genome were confirmed and verified by marker selection and histochemical assay tests. These results suggest an efficient biolistic gun, and Agrobacterium-mediated transformation methods for stable integration of economically important genes into common beans calli, and that these transformations systems could be useful for future studies on transferring economically important genes into common bean plants.
Author: E. EISSA
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W2189486427