The international symposium "Auxins and Cytokinins in Plant Development" (ACPD), which is held every 4⁻5 years in Prague, Czech Republic, is a meeting of scientists interested in the elucidation of the action of two important plant hormones-auxins and cytokinins. It is organized by a group of researchers from the Laboratory of Hormonal Regulations in Plants at the Institute of Experimental Botany, the Czech Academy of Sciences. The symposia already have a long tradition, having started in 1972. Thanks to the central role of auxins and cytokinins in plant development, the ACPD 2018 symposium was again attended by numerous experts who presented their results in the opening, two plenary lectures, and six regular sessions, including two poster sessions. Due to the open character of the research community, which is traditionally very well displayed during the meeting, a lot of unpublished data were presented and discussed. In this report, we summarize the contributions in individual sessions that attracted our attention.

CEITEC⁻Central European Institute of Technology and Functional Genomics and Proteomics NCBR Faculty of Science Masaryk University 62500 Brno Czech Republic

Laboratory of Hormonal Regulations in Plants Institute of Experimental Botany The Czech Academy of Sciences Rozvojova 263 16502 Prague 6 Czech Republic

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The Hydrophilic Loop of Arabidopsis PIN1 Auxin Efflux Carrier Harbors Hallmarks of an Intrinsically Disordered Protein