Soybean Embryonic Axis Transformation: Combining Biolistic and Agrobacterium-Mediated Protocols to Overcome Typical Complications of In Vitro Plant Regeneration

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ID: 278361
2020
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Abstract
The first successful attempt to generate genetically modified plants expressing a transgene was preformed via T-DNA-based gene transfer employing Agrobacterium tumefaciens-mediated genetic transformation. Limitations over infectivity and in vitro tissue culture led to the development of other DNA delivery systems, such as the biolistic method. Herein, we developed a new one-step protocol for transgenic soybean recovery by combining the two different transformation methods. This protocol comprises the following steps: agrobacterial preparation, seed sterilization, soybean embryo excision, shoot-cell injury by tungsten-microparticle bombardment, A. tumefaciens-mediated transformation, embryo co-cultivation in vitro, and selection of transgenic plants. This protocol can be completed in approximately 30–40 weeks. The average efficiency of producing transgenic soybean germlines using this protocol was 9.84%, similar to other previously described protocols. However, we introduced a more cost-effective, more straightforward and shorter methodology for transgenic plant recovery, which allows co-cultivation and plant regeneration in a single step, decreasing the chances of contamination and making the manipulation easier. Finally, as a hallmark, our protocol does not generate plant chimeras, in contrast to traditional plant regeneration protocols applied in other Agrobacterium-mediated transformation methods. Therefore, this new approach of plant transformation is applicable for studies of gene function and the production of transgenic cultivars carrying different traits for precision-breeding programs.
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melo2020soybeanfrontiers Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Bruno Paes de Melo, Isabela Tristan Lourenço-Tessutti, Carolina Vianna Morgante, Naiara Cordeiro Santos, Luanna Bezerra Pinheiro, Camila Barrozo de Jesus Lins, Maria Cristina Matar Silva, Leonardo Lima Pepino Macedo, Elizabeth Pacheco Batista Fontes, Maria Fatima Grossi-de-Sa
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Journal Frontiers in plant science
Year 2020
DOI
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URL
https://www.frontiersin.org/article/10.3389/fpls.2020.01228/full
Keywords
chemistry Infectious and parasitic diseases Biology (General) Medicine Immunologic diseases. Allergy food processing and manufacture agriculture plant culture bibliography. library science. information resources philosophy. psychology. religion philosophy (general) diplomatics. archives. seals

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