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Embryogenic cells in plant tissue cultures: Occurrence and behavior

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Summary

Plants develop from meristems where cells proliferate and are partitioned into layers that eventually differentiate to form the various tissues and organs of the plant. A phenomenon unique to certain plant tissues is the ability to inducede nova a range of developmental patterns, including embryogenesis. The temporal and spacial distribution of these developmental competencies suggests that regulatory proteins, rather than a lack of signals or signal receptors, shield specific developmental genes from signals that otherwise would confuse development. Studies involving embryogenic cells demonstrate that they are not strongly shielded from developmental signals, thus they are not determined. Furthermore, the normal development of zygotic and somatic embryos is readily perturbed by abnormal physicochemical environments. This suggests that embryogeny remains developmentally plastic until differentiation is largely completed. The ability to induce somatic embryogenesis from specific tissues by specific signals is providing opportunities to further the molecular characterization of the menagerie of genetic regulation involved in development.

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  1. Plants, Soils and Biometeorology Department, Utah State University, 84322, Logan, Utah

    John G. Carman

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Carman, J.G. Embryogenic cells in plant tissue cultures: Occurrence and behavior. In Vitro Cell Dev Biol 26, 746–753 (1990). https://doi.org/10.1007/BF02623615

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