Abstract
Plants were regenerated from cotyledon tissue of greenhouse grown seedlings of common buckwheat (Fagopyrum esculentum Moench.). Maximum callus regeneration was induced on Murashige and Skoog (MS) medium containing 2,4-D (2.0 mg l−1) and kinetin (KIN) (0.2 mg l−1) and either 3 or 6% sucrose. Friable callus was transferred to MS media containing KIN and benzylaminopurine (BAP) at varied concentrations for embryogenic callus induction. The optimum medium for embryogenic callus induction was found to be MS medium supplemented with 0.2 mg l−1 KIN, 2.0 mg l−1 BAP and 3% (w/v) sucrose. Variation of sucrose from 3 to 6% did not show any significant effect on callus induction or embryogenesis. Regeneration of embryonic callus varied from 13 to 32%. Whole plants were obtained at high frequencies when the embryogenic calluses with somatic embryos and organized shoot primordia were transferred to half-strength MS media with 3% sucrose. Regenerated plants after acclimation were transferred to greenhouse conditions, and both vegetative and floral characteristics were observed for variation. This regeneration system may be valuable for genetic transformation and cell selection in common buckwheat.
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