Biologia plantarum 51:533-537, 2007 | DOI: 10.1007/s10535-007-0115-8
Plant regeneration from Gossypium davidsonii protoplasts via somatic embryogenesis
- 1 National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei, P.R. China
Protoplasts isolated from wild cotton Gossypium davidsonii were cultured in KM8P medium supplemented with different phytohormones. The most effective combination was 0.45 µM 2,4-dichlorophenoxyacetic acid, 2.68 µM α-naphthaleneacetic acid and 0.93 µM kinetin and the division percentage at the 8th day was 30.78 ± 3.04 %. The density of protoplasts at 2-10 × 105 cm-3 was suitable for protoplast division and calli formation, with a division percentage of 32.21 ± 3.64 % and a plating efficiency of 9.12 ± 2.61 % at the 40th day. The optimal osmotic potential was achieved using 0.5 M glucose or 0.1 M glucose plus 0.5 M mannitol. Protoplasts were cultured in three ways, a double-layer culture system, with liquid over solid medium was proved to be the best way. Embryo induction was further increased by addition of 0.14 µM gibberellic acid.
Keywords: cotton; 2,4-dichlorophenoxyacetic acid; gibberellic acid; kinetin; α-naphthaleneacetic acid; protoplast culture
Subjects: auxins; cotton; cytokinins; gibberellic acid, gibberellin; Gossypium davidsonii; in vitro culture, callus growth and duration; in vitro culture, embryogenesis, somatic embryogenesis; in vitro culture, regeneration, proliferation, differentiation; protoplasts
Received: August 16, 2005; Accepted: June 20, 2006; Published: September 1, 2007 Show citation
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