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Updated: Jan 29, 2026

Author Spotlight: Soybean Hairy Root Transformation for the Analysis of Gene Function
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Factors affecting soybean cotyledonary node transformation.

C A Meurer1, R D Dinkins1, G B Collins1

  • 1Department of Agronomy, N109 Agriculture Science Center Building North, University of Kentucky, Lexington, KY 40546-0091, USA Fax: +1-606-257-7125 e-mail: gcollins@pop.uky.edu, , , , , , US.

Plant Cell Reports
|February 13, 2019
PubMed
Summary
This summary is machine-generated.

The Agrobacterium tumefaciens strain KYRT1 demonstrated superior soybean cotyledonary node transformation efficiency. Sonication-assisted Agrobacterium-mediated transformation (SAAT) did not enhance stable transformation and negatively impacted shoot proliferation in some soybean genotypes.

Keywords:
AgrobacteriumKYRT1Key words SoybeanSAAT (sonication assisted Agrobacterium-mediated transformation)Transformation

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Area of Science:

  • Plant biotechnology
  • Molecular biology
  • Agricultural science

Background:

  • Soybean [Glycine max (L.) Merr.] genetic transformation is crucial for crop improvement.
  • Optimizing transformation protocols is essential for efficient gene delivery and trait development.

Purpose of the Study:

  • To evaluate cotyledonary node transformation efficiency in soybean using different Agrobacterium tumefaciens strains and sonication-assisted Agrobacterium-mediated transformation (SAAT).
  • To identify the most effective A. tumefaciens strain for soybean transformation.
  • To assess the impact of SAAT on transformation efficiency and shoot proliferation across diverse soybean genotypes.

Main Methods:

  • Soybean cotyledonary node explants from 28 genotypes were subjected to Agrobacterium-mediated transformation with three A. tumefaciens strains.
  • A binary vector containing GUS-intron and NPTII selectable marker genes was used.
  • Sonication-assisted Agrobacterium-mediated transformation (SAAT) was compared to a standard protocol.
  • Transformation efficiency and shoot proliferation were evaluated at 10 and 45 days post-co-cultivation.

Main Results:

  • The A. tumefaciens strain KYRT1 exhibited the highest stable GUS transformation efficiency at 45 days post-co-cultivation.
  • SAAT did not improve stable transformation rates at 45 days.
  • SAAT significantly reduced shoot proliferation in certain soybean genotypes.
  • Significant genotypic variations in transformation and shoot proliferation frequencies were observed.

Conclusions:

  • A. tumefaciens strain KYRT1 is recommended for soybean cotyledonary node transformation.
  • SAAT is not beneficial for enhancing stable transformation in this context and may hinder regeneration.
  • Genotype selection is critical for successful soybean transformation and regeneration.