Phloem-Transported Cytokinin Regulates Polar Auxin Transport and Maintains Vascular Pattern in the Root Meristem

Dello Ioio, 2007, Cytokinins determine Arabidopsis root-meristem size by controlling cell differentiation, Curr. Biol., 17, 678, 10.1016/j.cub.2007.02.047 Mähönen, 2006, Cytokinin signaling and its inhibitor AHP6 regulate cell fate during vascular development, Science, 311, 94, 10.1126/science.1118875 Laplaze, 2007, Cytokinins act directly on lateral root founder cells to inhibit root initiation, Plant Cell, 19, 3889, 10.1105/tpc.107.055863 Kudo, 2010, Metabolism and long-distance translocation of cytokinins, J. Integr. Plant Biol., 52, 53, 10.1111/j.1744-7909.2010.00898.x Matsumoto-Kitano, 2008, Cytokinins are central regulators of cambial activity, Proc. Natl. Acad. Sci. USA, 105, 20027, 10.1073/pnas.0805619105 Shimizu-Sato, 2009, Auxin-cytokinin interactions in the control of shoot branching, Plant Mol. Biol., 69, 429, 10.1007/s11103-008-9416-3 Bishopp, 2011, A mutually inhibitory interaction between auxin and cytokinin specifies vascular pattern in roots, Curr. Biol., 21, 917, 10.1016/j.cub.2011.04.017 Dello Ioio, 2008, A genetic framework for the control of cell division and differentiation in the root meristem, Science, 322, 1380, 10.1126/science.1164147 Müller, 2008, Cytokinin and auxin interaction in root stem-cell specification during early embryogenesis, Nature, 453, 1094, 10.1038/nature06943 Blilou, 2005, The PIN auxin efflux facilitator network controls growth and patterning in Arabidopsis roots, Nature, 433, 39, 10.1038/nature03184 Friml, 2003, Efflux-dependent auxin gradients establish the apical-basal axis of Arabidopsis, Nature, 426, 147, 10.1038/nature02085 Sabatini, 1999, An auxin-dependent distal organizer of pattern and polarity in the Arabidopsis root, Cell, 99, 463, 10.1016/S0092-8674(00)81535-4 Aida, 2004, The PLETHORA genes mediate patterning of the Arabidopsis root stem cell niche, Cell, 119, 109, 10.1016/j.cell.2004.09.018 Ruzicka, 2009, Cytokinin regulates root meristem activity via modulation of the polar auxin transport, Proc. Natl. Acad. Sci. USA, 106, 4284, 10.1073/pnas.0900060106 Pernisová, 2009, Cytokinins modulate auxin-induced organogenesis in plants via regulation of the auxin efflux, Proc. Natl. Acad. Sci. USA, 106, 3609, 10.1073/pnas.0811539106 Vonk, 1981, 8-14C-Zeatin metabolites and their transport from leaf to phloem exudates of Yucca, Physiol. Plant., 52, 101, 10.1111/j.1399-3054.1981.tb06041.x Badenoch-Jones, 1984, Phytohormones, Rhizobium mutants, and nodulation in legumes. V. Cytokinin metabolism in effective and ineffective pea root nodules, Plant Physiol., 74, 239, 10.1104/pp.74.2.239 Abo-hamed, 1984, Biochemical and physiological aspects of leaf development in cocoa. VIII. Export and distribution of 14C auxin and kinin from the young and mature leaves, New Phytol., 97, 219, 10.1111/j.1469-8137.1984.tb04125.x Takei, 2004, Arabidopsis CYP735A1 and CYP735A2 encode cytokinin hydroxylases that catalyze the biosynthesis of trans-Zeatin, J. Biol. Chem., 279, 41866, 10.1074/jbc.M406337200 Corbesier, 2003, Cytokinin levels in leaves, leaf exudate and shoot apical meristem of Arabidopsis thaliana during floral transition, J. Exp. Bot., 54, 2511, 10.1093/jxb/erg276 Lejeune, 2006, Cytokinins in phloem and xylem saps of Sinapis alba during floral induction, Physiol. Plant., 90, 522, 10.1111/j.1399-3054.1994.tb08810.x Bonke, 2003, APL regulates vascular tissue identity in Arabidopsis, Nature, 426, 181, 10.1038/nature02100 Swarup, 2001, Localization of the auxin permease AUX1 suggests two functionally distinct hormone transport pathways operate in the Arabidopsis root apex, Genes Dev., 15, 2648, 10.1101/gad.210501 Petrásek, 2009, Auxin transport routes in plant development, Development, 136, 2675, 10.1242/dev.030353 Hirose, 2008, Regulation of cytokinin biosynthesis, compartmentalization and translocation, J. Exp. Bot., 59, 75, 10.1093/jxb/erm157 Lee, 2006, Transcriptional and posttranscriptional regulation of transcription factor expression in Arabidopsis roots, Proc. Natl. Acad. Sci. USA, 103, 6055, 10.1073/pnas.0510607103 Miyawaki, 2004, Expression of cytokinin biosynthetic isopentenyltransferase genes in Arabidopsis: Tissue specificity and regulation by auxin, cytokinin, and nitrate, Plant J., 37, 128, 10.1046/j.1365-313X.2003.01945.x Werner, 2003, Cytokinin-deficient transgenic Arabidopsis plants show multiple developmental alterations indicating opposite functions of cytokinins in the regulation of shoot and root meristem activity, Plant Cell, 15, 2532, 10.1105/tpc.014928 Mähönen, 2006, Cytokinins regulate a bidirectional phosphorelay network in Arabidopsis, Curr. Biol., 16, 1116, 10.1016/j.cub.2006.04.030 Romanov, 2006, Biochemical characteristics and ligand-binding properties of Arabidopsis cytokinin receptor AHK3 compared to CRE1/AHK4 as revealed by a direct binding assay, J. Exp. Bot., 57, 4051, 10.1093/jxb/erl179 Kojima, 2009, Highly sensitive and high-throughput analysis of plant hormones using MS-probe modification and liquid chromatography-tandem mass spectrometry: An application for hormone profiling in Oryza sativa, Plant Cell Physiol., 50, 1201, 10.1093/pcp/pcp057 Zuo, 2000, Technical advance: An estrogen receptor-based transactivator XVE mediates highly inducible gene expression in transgenic plants, Plant J., 24, 265, 10.1046/j.1365-313x.2000.00868.x