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BOLITA, an Arabidopsis AP2/ERF-like transcription factor that affects cell expansion and proliferation/differentiation pathways

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Abstract

The BOLITA (BOL) gene, an AP2/ERF transcription factor, was characterized with the help of an activation tag mutant and overexpression lines in Arabidopsis and tobacco. The leaf size of plants overexpressing BOL was smaller than wild type plants due to a reduction in both cell size and cell number. Moreover, severe overexpressors showed ectopic callus formation in roots. Accordingly, global gene expression analysis using the overexpression mutant reflected the alterations in cell proliferation, differentiation and growth through expression changes in RBR, CYCD, and TCP genes, as well as genes involved in cell expansion (i.e. expansins and the actin remodeling factor ADF5). Furthermore, the expression of hormone signaling (i.e. auxin and cytokinin), biosynthesis (i.e. ethylene and jasmonic acid) and regulatory genes was found to be perturbed in bol-D mutant leaves.

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Abbreviations

BL22-23:

Brassinolide22-23

EBR:

24-Epibrassinolide

BAP:

Benzyl-amino-purine

NAA:

Naphthalenacetic acid

IAA:

Indole-3-acetic acid

ACC:

1-Aminocyclopropane-1-carboxylic acid

AVG:

Aminoethoxyvinylglycine

STS:

Silver thiosulphate

SAUR:

Small auxin up-regulated RNAs

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Acknowledgements

We thank Robert Sevenier, Sacco de Vries and Cathy Albracht, Kim Boutilier, Asaph Aharoni, and Gert van Arkel for useful suggestions, discussions and help with materials, and Jeroen Peters and Wim Dirkse for technical help with the flow cytometry experiment. We are grateful to Jose Feijo and Margarida Oliveira as organizers of the 2004 EMBO course on Development at Oeiras, Portugal, and Assaf Zemach for collaboration during the global gene expression analysis. Isabelle Bertin is thanked for technical assistance, and Daan Jaspers and Gerrit Stunnenberg for plant care. J.D.B. was supported by fellowship SFRH/BPD/3619/2000 from Fundacão para a Ciência e a Tecnologia. S.D. and A.K. were supported by fellowships from WOTRO-NWO.

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Correspondence to Andy Pereira.

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Nayelli Marsch-Martinez and Raffaella Greco contributed equally to this work.

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Marsch-Martinez, N., Greco, R., Becker, J.D. et al. BOLITA, an Arabidopsis AP2/ERF-like transcription factor that affects cell expansion and proliferation/differentiation pathways. Plant Mol Biol 62, 825–843 (2006). https://doi.org/10.1007/s11103-006-9059-1

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