Abstract
This study describes the successful formation of floral organ pistil from the callus of pistil explants of Oryza sativa L. For induction of floral organs, different explants—including young embryo, lemma, palea and pistil—were used for callus induction with different combinations of N6-benzyladenine and 2,4-dichlorophenoxyacetic acid (2,4-D). High frequencies of callus formation from pistil and young embryo explants were achieved. Floral organs were induced after calli from pistils were transferred to medium containing both zeatin and 2,4-D. The morphological characteristics of the pistil-like organs are very similar to those formed in planta though with minor differences. Further histological study revealed that the in vitro pistil contains an ovule within its ovary. Furthermore, a pistil-specific gene, OsMADS3 used as a molecular marker for pistil identity, was expressed in the pistil-like organs as it was in pistils in the flower of the plant.
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Acknowledgements
This research was supported by the National Natural Science Foundation of China (30370143) and the Major State Basic Research Program of the People’s Republic of China (G19990116) to X.S. Zhang.
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An, Y.R., Li, X.G., Su, H.Y. et al. Pistil induction by hormones from callus of Oryza sativa in vitro. Plant Cell Rep 23, 448–452 (2004). https://doi.org/10.1007/s00299-004-0864-1
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DOI: https://doi.org/10.1007/s00299-004-0864-1