Cited by 896Plant tissue culture and regenerationPlant Molecular Biology ResearchGenetically Modified Organisms Research

Morphogenic Regulators Baby boom and Wuschel Improve Monocot Transformation

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Lowe, Keith, Wu, Emily, Wang, Ning, Hoerster, George, Hastings, Craig, Cho, Myeong-Je, Scelonge, Chris, Lenderts, Brian +25 more·2016·The Plant Cell

Abstract

While transformation of the major monocot crops is currently possible, the process typically remains confined to one or two genotypes per species, often with poor agronomics, and efficiencies that place these methods beyond the reach of most academic laboratories. Here, we report a transformation approach involving overexpression of the maize (Zea mays) Baby boom (Bbm) and maize Wuschel2 (Wus2) genes, which produced high transformation frequencies in numerous previously nontransformable maize inbred lines. For example, the Pioneer inbred PHH5G is recalcitrant to biolistic and Agrobacterium tumefaciens transformation. However, when Bbm and Wus2 were expressed, transgenic calli were recovered from over 40% of the starting explants, with most producing healthy, fertile plants. Another limitation for many monocots is the intensive labor and greenhouse space required to supply immature embryos for transformation. This problem could be alleviated using alternative target tissues that could be supplied consistently with automated preparation. As a major step toward this objective, we transformed Bbm and Wus2 directly into either embryo slices from mature seed or leaf segments from seedlings in a variety of Pioneer inbred lines, routinely recovering healthy, fertile T0 plants. Finally, we demonstrated that the maize Bbm and Wus2 genes stimulate transformation in sorghum (Sorghum bicolor) immature embryos, sugarcane (Saccharum officinarum) callus, and indica rice (Oryza sativa ssp indica) callus.

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  • Overexpression of developmental regulators such as the maize BABY BOOM (BBM) and WUSCHEL 2 (WUS2) genes has increased the transformation efficiency in sorghum, rice, and sugarcane.

    “Overexpression of developmental regulators such as the maize BABY BOOM (BBM) and WUSCHEL 2 (WUS2) genes has increased the transformation efficiency in sorghum, rice, and sugarcane (Lowe et al., 2016;Mookkan et al., 2017).”

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Research works printed but not linked: 3

  1. Johansen, D.A. (1940). Plant Microtechnique. (New York: McGraw- Hill).
  2. Lowe, K., Hoerster, G., Sun, X., Rasco-Gaunt, S., Lazerri, P., Abbitt, S., Glassman, K., and Gordon-Kamm, B. (2002). Maize LEC1 improves transformation in both maize and wheat. In Plant Biotechnology 2002 and Beyond, I.K. Vasil, ed (Dordrecht, The Netherlands: Kluwer Academic Publishers), pp. 255-258.
  3. Zhao, Z.-Y., Glassman, K., Sewalt, V., Wang, N., Miller, M., Chang, S., Thompson, T., Catron, S., Wu, E., Bidney, D., and Jung, R. (2002). Nutritionally improved transgenic sorghum. In Plant Biotechnology 2002 and Beyond, I.K. Vasil, ed (Dordrecht, The Netherlands: Kluwer Academic Publishers), pp. 413-416.

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Authors
Lowe, K., Wu, E., Wang, N., Hoerster, G., Hastings, C., Cho, M.-J., Scelonge, C., Lenderts, B., Chamberlin, M., Cushatt, J., Wang, L., Ryan, L., Khan, T., Chow-Yiu, J., Hua, W., Yu, M., Banh, J., Bao, Z., Brink, K., Igo, E., Rudrappa, B., Shamseer, P., Bruce, W., Newman, L., Shen, B., Zheng, P., Bidney, D., Falco, C., Register, J., Zhao, Z.-Y., Xu, D., Jones, T., & Gordon-Kamm, W.
Affiliations
  • Pioneer Hi-Bred (US)
  • Fruhling Biosciences, West Marredpally, Secunderabad, Telangana 500026, India
  • DuPont (United States) (US)
  • BASF Plant Science, Research Triangle Park, North Carolina 27709
  • Dow AgroSciences, Indianapolis, Indiana 46268
  • DuPont Pioneer, Johnston, Iowa 50131
Venue
The Plant Cell
Published
2016-09
Volume
28
Issue
9
Pages
1998-2015
ISSN
  • 1040-4651 (ISSN-L)
  • 1532-298X
OpenAlex
W2518225655
Cited by
881
References
93
Citations by year
2026: 93 · 2025: 131 · 2024: 106 · 2023: 101 · 2022: 117 · 2021: 94 · 2020: 91 · 2019: 57 · 2018: 47 · 2017: 38 · 2016: 5 · 2012: 1
FWCI
25.46
Type
journal article
Language
en
Open access
Locations
  • The Plant Cell (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Plant tissue culture and regeneration
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Molecular Biology Research
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Genetically Modified Organisms Research
Keywords
monocot transformation, baby boom, maize, gene overexpression, transformation frequency, transgenic callus, sorghum, sugarcane, Indica rice, inbred lines

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