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Direct somatic embryogenesis fromBegonia gracilis explants.

B Castillo1, M A L Smith1

  • 1Department of Natural Resources and Environmental Sciences, University of Illinois, 1201 S. Dorner Drive, 61801, IL, Urbana, USA.

Plant Cell Reports
|February 8, 2019
PubMed
Summary
This summary is machine-generated.

Direct somatic embryogenesis in Begonia gracilis was achieved using microcultured explants. Petioles yielded higher frequencies of somatic embryos, while leaf sections produced more embryos per explant.

Keywords:
Red lightSomatic embryogenesis Begonia

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Area of Science:

  • Plant Biotechnology
  • Somatic Embryogenesis
  • Plant Tissue Culture

Background:

  • Begonia gracilis is a popular ornamental plant.
  • Efficient regeneration protocols are crucial for mass propagation and genetic improvement.
  • Somatic embryogenesis offers a promising route for asexual propagation.

Purpose of the Study:

  • To investigate direct somatic embryogenesis in Begonia gracilis.
  • To compare the efficiency of different explant types (petiole vs. leaf blade) for somatic embryogenesis.
  • To evaluate the effect of light conditions on somatic embryo production.

Main Methods:

  • Microculturing of laminar segments and petioles of Begonia gracilis.
  • Culture on Murashige and Skoog medium supplemented with kinetin and coconut water.
  • Exposure to red light or dark conditions.

Main Results:

  • Direct somatic embryogenesis was successfully induced from both petiole and leaf explants.
  • Petiole explants showed higher induction frequency (80%) under red light compared to leaf explants (30%).
  • Leaf explants produced a greater number of somatic embryos per responding explant (60-70) than petioles (40-50).
  • Somatic embryos developed faster from petioles (5 weeks) than from leaf explants (8 weeks).
  • Regenerated plantlets were morphologically similar to the parent clone.

Conclusions:

  • Direct somatic embryogenesis is an effective method for regenerating Begonia gracilis.
  • Petioles are superior for high-frequency induction, while leaf explants yield higher embryo numbers.
  • Optimized conditions can facilitate efficient clonal propagation of Begonia gracilis.