Abstract
Plant morphology was analyzed in the abr and ap1-1 single mutants, the abr ap1-1 double mutant, and abr mutant plants with extopic expression of the AP1 gene under the control of the 35S RNA constitutive promoter of the cauliflower mosaic virus (abr 35S::AP1). The level of AP1 gene expression was examined in wild-type plants and the abr mutant. The ABR gene was found to interact with the AP1 via dominant epistasis when determining the time of a transition to the reproductive developmental stage and the floral meristem identity. The abr mutant displayed a higher level of AP1 transcription and extended regions of its transcription in leaves and internal whorls of the flowers. Based on these findings, the ABR gene was assumed to play an indirect role in restricting the level and spatial range of AP1 transcription. A complementary interaction of the dominant alleles was observed during floral development, implicating both of the genes in the process.
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Christensen, S.K., Dagenais, N., Chory, J., et al., Regulation of Auxin Response by Protein Kinase PINOID, Cell, 2000, vol. 100, pp. 469–478.
Friml, J., Yang, X., Michniewicz, M., et al., A PINOID Dependent Binary Switch in Apical-Basal PIN Polar Targeting Directs Auxin Efflux, Science, 2004, vol. 306, pp. 862–865.
Michniewicz, M., Marcelo, K.Z., Lindy, A., et al., Antagonistic Regulation of PIN Phosphorylation by PP2A and PINOID Directs Auxin Flux, Cell, 2007, vol. 130, pp. 1044–1056.
Bennet, S.R.M., Alvares, J., Bossinger, G., and Smyth, D.R., Morphogenesis in pinoid Mutants of Arabidopsis thaliana, Plant J., 1995, vol. 8, pp. 505–520.
Kalinina, A.Yu., Ezhova, T.A., Golubeva, N.V., et al., Auxin Polar Transport in the abrurtus Mutant of Arabidopsis thaliana (L.) Heunh., Vestn. S.-Peterb. Gos. Univ., Ser. 3, 2000, vol. 1, no. 3, pp. 44–51.
Ezhova, T.A., Soldatova, O.P., and Kalinina, A.Yu., Interactions between the ABRUPTUS/PINOID and LEAFY Genes during Floral Morphogenesis in Arabidopsis thaliana (L.) Heynh., Russ. J. Genet., 2000, vol. 36, no. 12, pp. 1418–1422.
Benjamins, R., Quint, A., Weijers, D., et al., The PINOID Protein Kinase Regulates Organ Development in Arabidopsis by Enhancing Polar Auxin Transport, Development, 2001, vol. 128, pp. 4057–4067.
Ezhova, T.A., Ondar, U.N., Soldatova, O.P., and Kuznetsova, T.A., The Role of the ABRUPTUS Gene in Inflorescence Differentiation in Arabidopsis thaliana (L.) Heynh., Dokl. Akad. Nauk, 1997, vol. 354, no. 6, pp. 839–842.
Vernoux, T., Kronenberger, J., Grandjean, O., et al., PINFORMED 1 Regulates Cell Fate at the Periphery of the Shoot Apical Meristem, Development, 2000, vol. 127, pp. 5157–5165.
Lebedeva, O.V., Ondar, U.N., Penin, A.A., and Ezhova, T.A., Effect of the ABRUPTUS/PINOID Gene on Expression of the LEAFY Gene in Arabidopsis thaliana, Russ. J. Genet., 2005, vol. 41, no. 4, pp. 559–565.
Mandel, M.A., Gustafson-Brown, C., Savidge, B., and Yanofsky, M.F., Molecular Characterization of the Arabidopsis Floral Homeotic Gene APETALA1, Nature, 1992, vol. 360, pp. 273–277.
Irish, V.F. and Sussex, M., Function of the apetala-1 Gene during Arabidopsis Floral Development, Plant Cell, 1990, vol. 2, pp. 741–753.
Bowman, J.L., Alvares, J., Weigel, D., et al., Control of Flower Development in Arabidopsis thaliana by APETALA1 and Interacting Genes, Development, 1993, vol. 119, pp. 721–743.
Liljegren, S.J., Gustafson-Brown, C., Pinyopich, A., et al., Interactions among APETALA1, LEAFY, and TERMINAL FLOWER1 Specify Meristem Fate, Plant Cell, 1999, vol. 11, pp. 1007–1018.
Liu, C., Zhou, J., Bracha-Drori, K., et al., Specification of Arabidopsis Floral Meristem Identity by Repression of Flowering Time Genes, Development, 2007, vol. 134, no. 10, pp. 1901–1910.
Jefferson, R.A., Kavanagh, T.A., and Bevan, M.W., GUS Fusions: β-Glucuronidase as a Sensitive and Versatile Gene Fusion Marker in Higher Plants, EMBO J., 1987, vol. 6, pp. 3901–3907.
Czechowski, T., Stitt, M., Altmann, T., et al., Genome-Wide Identification and Testing of Superior Reference Genes for Transcript Normalization in Arabidopsis1, Plant Physiol., 2005, vol. 139, pp. 5–17.
Skryabin, K.G., Alekseev, D.V., Ezhova, T.A., et al., Type Specification and Spatial Pattern Formation of Floral Organs: A Dynamic Development Model, Izv. Ross. Akad. Nauk, Ser. Biol., 2006, no. 6, pp. 645–659.
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Original Russian Text © U.N. Kavai-ool, O.Yu. Karpenko, T.A. Ezhova, 2010, published in Genetika, 2010, Vol. 46, No. 3, pp. 373–382.
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Kavai-ool, U.N., Karpenko, O.Y. & Ezhova, T.A. Interaction between the ABRUPTUS/PINOID and APETALA1 genes regulating the inflorescence development in Arabidopsis thaliana . Russ J Genet 46, 331–339 (2010). https://doi.org/10.1134/S1022795410030105
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DOI: https://doi.org/10.1134/S1022795410030105