Abstract
Embryogenic calluses of sugarcane capable of regenerating green plants after long-term culture were sought. The largest quantities of embryogenic calluses were produced on Murashige & Skoog medium, but cultures maintained on Chu N6 medium remained embryogenic and totipotent longer. Both media contained 4.5 μM 2,4-dichlorophenoxyacetic acid (2,4-d). The effect of supplements on somatic embryogenesis was examined. Kinetin (0.5 μM) and 10% (v/v) coconut water in callus initiation medium were inhibitory to subsequent embryogenesis. Embryogenic calluses on N6 medium increased in fresh weight with proline concentration up to 90 mM. Maximum fresh weight was achieved with 5% sucrose. Although genotypic differences were observed, embryogenesis occurred in all 17 sugarcane clones tested. Embryogenic calluses of one cultivar regenerated green plants after 16 months, but suspensions were totipotent for only 8 months. Total number of regenerated plants decreased with time in culture, while the number of pale green plants increased starting after 5 months in culture.
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Published as Paper No. 785 in the journal series of the Experiment Station, HSPA
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Fitch, M.M.M., Moore, P.H. Long-term culture of embryogenic sugarcane callus. Plant Cell Tiss Organ Cult 32, 335–343 (1993). https://doi.org/10.1007/BF00042297
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DOI: https://doi.org/10.1007/BF00042297