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FRUITFULL Is a Repressor of Apical Hook Opening in Arabidopsis thaliana

Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences Vienna (BOKU), Muthgasse 18, 1190 Vienna, Austria
Department of Biochemistry and Biotechnology, Faculty of Agronomy and Bioengineering, Poznań University of Life Sciences, Dojazd 11, 60-632 Poznań, Poland
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2020, 21(17), 6438;
Received: 23 July 2020 / Revised: 24 August 2020 / Accepted: 31 August 2020 / Published: 3 September 2020
(This article belongs to the Section Molecular Plant Sciences)
Plants adjust their architecture to a constantly changing environment, requiring adaptation of differential growth. Despite their importance, molecular switches, which define growth transitions, are largely unknown. Apical hook development in dark grown Arabidopsis thaliana (A. thaliana) seedlings serves as a suitable model for differential growth transition in plants. Here, we show that the phytohormone auxin counteracts the light-induced growth transition during apical hook opening. We, subsequently, identified genes which are inversely regulated by light and auxin. We used in silico analysis of the regulatory elements in this set of genes and subsequently used natural variation in gene expression to uncover correlations between underlying transcription factors and the in silico predicted target genes. This approach uncovered that MADS box transcription factor AGAMOUS-LIKE 8 (AGL8)/FRUITFULL (FUL) modulates apical hook opening. Our data shows that transient FUL expression represses the expression of growth stimulating genes during early phases of apical hook development and therewith guards the transition to growth promotion for apical hook opening. Here, we propose a role for FUL in setting tissue identity, thereby regulating differential growth during apical hook development. View Full-Text
Keywords: apical hook opening; AGAMOUS-LIKE8; FRUITFULL; IAA; light apical hook opening; AGAMOUS-LIKE8; FRUITFULL; IAA; light
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MDPI and ACS Style

Führer, M.; Gaidora, A.; Venhuizen, P.; Dobrogojski, J.; Béziat, C.; Feraru, M.I.; Kleine-Vehn, J.; Kalyna, M.; Barbez, E. FRUITFULL Is a Repressor of Apical Hook Opening in Arabidopsis thaliana. Int. J. Mol. Sci. 2020, 21, 6438.

AMA Style

Führer M, Gaidora A, Venhuizen P, Dobrogojski J, Béziat C, Feraru MI, Kleine-Vehn J, Kalyna M, Barbez E. FRUITFULL Is a Repressor of Apical Hook Opening in Arabidopsis thaliana. International Journal of Molecular Sciences. 2020; 21(17):6438.

Chicago/Turabian Style

Führer, Miriam, Angelika Gaidora, Peter Venhuizen, Jedrzej Dobrogojski, Chloé Béziat, Mugurel I Feraru, Jürgen Kleine-Vehn, Maria Kalyna, and Elke Barbez. 2020. "FRUITFULL Is a Repressor of Apical Hook Opening in Arabidopsis thaliana" International Journal of Molecular Sciences 21, no. 17: 6438.

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