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Direct somatic embroygenesis from immature embryos of rosewood (Dalbergia latifolia Roxb.)

Abstract

Direct regeneration of somatic embryos was obtained from immature zygotic embryos of Dalbergia latifolia. Immature embryos dissected from green pods 90 d after flowering gave the highest frequency of somatic embryo formation. Preculture on high 2,4-D medium for 4 weeks induced direct somatic embryogenesis, which was expressed during the second culture phase in the presence of low 2,4-D along with a high sucrose concentration. Embryos were separated and transferred to the maturation medium containing MS + 0.5–1.0 mg/L BAP, where embryos developed into plantlets. Somatic embryos failed to convert into complete plants without BAP treatment. This method of direct regeneration of somatic embryos without a callus phase has direct application for genetic manipulation studies.

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Abbreviations

MS:

Murashige and Skoog (1962) medium

2,4-D:

2,4-Dichlorophenoxyacetic acid

BAP:

6-benzylaminopurine

ABA:

Abscisic acid

KIN:

Kinetin

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Communicated by G. C. Phillips

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Muralidhar Rao, M., Lakshmi Sita, G. Direct somatic embroygenesis from immature embryos of rosewood (Dalbergia latifolia Roxb.). Plant Cell Reports 15, 355–359 (1996). https://doi.org/10.1007/BF00232371

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Keywords

  • Somatic Embryo
  • Somatic Embryogenesis
  • Sucrose Concentration
  • Zygotic Embryo
  • Immature Embryo