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Ectopic Expression of BABY BOOM Triggers a Conversion from Vegetative to Embryonic Growth

Kim Boutilier, Remko Offringa, Vijay K. Sharma, Henk Kieft, Thérèse Ouellet, Lemin Zhang, Jiro Hattori, Chun-Ming Liu, André A. M. van Lammeren, Brian L. A. Miki, Jan B. M. Custers, Michiel M. van Lookeren Campagne
Kim Boutilier
Plant Research International, Wageningen, The NetherlandsEastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada, Ottawa, Canada
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Remko Offringa
Institute of Molecular Plant Sciences, Leiden University, Leiden, The Netherlands
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Vijay K. Sharma
Plant Research International, Wageningen, The Netherlands
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Henk Kieft
Plant Cell Biology, Wageningen University, Wageningen, The Netherlands
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Thérèse Ouellet
Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada, Ottawa, Canada
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Lemin Zhang
Plant Research International, Wageningen, The Netherlands
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Jiro Hattori
Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada, Ottawa, Canada
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Chun-Ming Liu
Plant Research International, Wageningen, The Netherlands
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André A. M. van Lammeren
Plant Cell Biology, Wageningen University, Wageningen, The Netherlands
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Brian L. A. Miki
Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada, Ottawa, Canada
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Jan B. M. Custers
Plant Research International, Wageningen, The Netherlands
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Michiel M. van Lookeren Campagne
Plant Research International, Wageningen, The Netherlands
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Published August 2002. DOI: https://doi.org/10.1105/tpc.001941

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Abstract

The molecular mechanisms underlying the initiation and maintenance of the embryonic pathway in plants are largely unknown. To obtain more insight into these processes, we used subtractive hybridization to identify genes that are upregulated during the in vitro induction of embryo development from immature pollen grains of Brassica napus (microspore embryogenesis). One of the genes identified, BABY BOOM (BBM), shows similarity to the AP2/ERF family of transcription factors and is expressed preferentially in developing embryos and seeds. Ectopic expression of BBM in Arabidopsis and Brassica led to the spontaneous formation of somatic embryos and cotyledon-like structures on seedlings. Ectopic BBM expression induced additional pleiotropic phenotypes, including neoplastic growth, hormone-free regeneration of explants, and alterations in leaf and flower morphology. The expression pattern of BBM in developing seeds combined with the BBM overexpression phenotype suggests a role for this gene in promoting cell proliferation and morphogenesis during embryogenesis.

  • Received January 28, 2002.
  • Accepted April 29, 2002.
  • Published July 18, 2002.
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Ectopic Expression of BABY BOOM Triggers a Conversion from Vegetative to Embryonic Growth
Kim Boutilier, Remko Offringa, Vijay K. Sharma, Henk Kieft, Thérèse Ouellet, Lemin Zhang, Jiro Hattori, Chun-Ming Liu, André A. M. van Lammeren, Brian L. A. Miki, Jan B. M. Custers, Michiel M. van Lookeren Campagne
The Plant Cell Aug 2002, 14 (8) 1737-1749; DOI: 10.1105/tpc.001941

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Ectopic Expression of BABY BOOM Triggers a Conversion from Vegetative to Embryonic Growth
Kim Boutilier, Remko Offringa, Vijay K. Sharma, Henk Kieft, Thérèse Ouellet, Lemin Zhang, Jiro Hattori, Chun-Ming Liu, André A. M. van Lammeren, Brian L. A. Miki, Jan B. M. Custers, Michiel M. van Lookeren Campagne
The Plant Cell Aug 2002, 14 (8) 1737-1749; DOI: 10.1105/tpc.001941
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The Plant Cell Online: 14 (8)
The Plant Cell
Vol. 14, Issue 8
Aug 2002
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