Abstract
Procedures for callus induction, plantlet regeneration, andAgrobacterium-mediated transformation ofBrassica juncea were optimized by studying several factors, including explant types, and various plant growth regulators and adjuvants, such as silver nitrate, sucrose and agar. The highest shoot regeneration frequency was obtained from hypocotyl and cotyledonary petiole explants on MS medium containing 3 mg/L benzylaminopurine (BA) and 2 mg/L α-naphthaleneacetic acid (NAA). Transformation was affected by a number of factors, including explant type, selection agents, preculture duration, pre-selection conditions, and coculture temperature. Transformation efficiencies for hypocotyl and cotyledonary petiole explants were at 65% and 69%, respectively.
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