This study describes a protocol for the induction of high frequency somatic embryogenesis directly from immature inflorescence explants in three sorghum genotypes (SPV-462, SPV-839, and M35-1). The effect of various growth regulators on somatic embryogenesis was investigated. High frequency somatic embrogenesis was obtained on Murashige and Skoog (MS) medium supplemented with 2 mg l−1 2, 4-dichlorophenoxyacetic acid (2, 4-D), and addition of 0.5 mg l−1 kinetin (KN) in the medium further improved the formation of somatic embryos per explant in all genotypes. The presence of 1.5 mg l−1 6-benzylaminopurine plus 1.0 mg l−1 KN in MS medium was most efficient for maturation and germination of somatic embryos. The genotype SPV-462 performed better than SPV-839 and M35-1 in terms of induction and germination of somatic embryos. Organogenesis also occurred in callus of all genotypes at the frequency of 20–25%. Regenerated plants from somatic embryos were successfully acclimatized in soil in the greenhouse where plants were grown to maturity, flowered, and set seeds. Regenerated plants appeared normal like that of the seed-raised plants.
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22 March 2007
High Frequency Somatic Embryogenesis and Regeneration in Different Genotypes of Sorghum bicolor (L.) Moench from immature inflorescence explants
G. Jogeswar,
D. Ranadheer,
V. Anjaiah,
P. B Kavi Kishor
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In Vitro Cellular and Developmental Biology - Plant
Vol. 43 • No. 2
March 2007
Vol. 43 • No. 2
March 2007
embryogenesis
regeneration
Somatic embryos
sorghum
Tissue culture