caa a22 4500 39752255X CHVBK 20180308164637.0 cr unu---uuuuu 161202e199508 xx s 000 0 eng 10.1093/jxb/46.8.881 doi (NATIONALLICENCE)oxford-10.1093/jxb/46.8.881 REVIEW ARTICLE: Compartmental redistribution and long-distance transport of abscisic acid (ABA) in plants as influenced by environmental changes in the rhizosphere —a biomathematical model [Elektronische Daten] [Stefan Slovik, Wolfgang Daeter, Wolfram Hartung] Based on experimental data obtained in earlier studies on membrane permeabilities of abscisic acid (ABA) for cortex and stele cells of roots and on measured com-partmental pH shifts after onset or release of different types of soil-borne stresses, a biomathematical model was developed which permits computer analysis of the dynamics of compartmental ABA distribution within different root tissues (cortex, stele) and their compartments (apoplast, cytosol, vacuole), and in the xylem sap of the root stele. Metabolism and conjugation of ABA and its export from roots via the xylem and its import into roots via phloem sap flow are also taken into consideration. We want to know which soil-borne stresses can biophysically provoke a root-to-shoot signal of ABA. In this communication we describe the biomathematical structure of the root model and present all necessary morphological (volumes, surfaces etc.) and physiological (pH, membrane conductances etc.) parameters of unstressed roots. This root model and an available leaf model are integrated to a plant model (rosette plant). Simulations reveal the fundamental role of the stele tissues, the rhizospheric ABA concentration and the ABA synthesis in roots (root-to-shoot communication). The shoot-to-root communication strongly depends on ABA synthesis in leaves, but hardly on ABA redistribution effects after stress-induced compartmental pH-shifts in leaves. © Oxford University Press Perspectives in Experimental Botany nationallicence Abscisic acid nationallicence compartmental redistribution nationallicence computer model nationallicence pH shifts nationallicence root-to-shoot communication nationallicence shoot-to-root communication nationallicence Slovik Stefan Julius-von-Sachs-Institut für Biowissenschaften, Universität Würzburg, Lehrstuhl Botanik I, Mittlerer Dallenbergweg 64, D-97082 Würzburg, Germany aut Daeter Wolfgang Julius-von-Sachs-Institut für Biowissenschaften, Universität Würzburg, Lehrstuhl Botanik I, Mittlerer Dallenbergweg 64, D-97082 Würzburg, Germany aut Hartung Wolfram Julius-von-Sachs-Institut für Biowissenschaften, Universität Würzburg, Lehrstuhl Botanik I, Mittlerer Dallenbergweg 64, D-97082 Würzburg, Germany aut Journal of Experimental Botany Oxford University Press 46/8(1995-08), 881-894 0022-0957 46:8<881 1995 46 exbotj https://doi.org/10.1093/jxb/46.8.881 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/jxb/46.8.881 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Slovik Stefan Julius-von-Sachs-Institut für Biowissenschaften, Universität Würzburg, Lehrstuhl Botanik I, Mittlerer Dallenbergweg 64, D-97082 Würzburg, Germany aut NATIONALLICENCE 700 1- Daeter Wolfgang Julius-von-Sachs-Institut für Biowissenschaften, Universität Würzburg, Lehrstuhl Botanik I, Mittlerer Dallenbergweg 64, D-97082 Würzburg, Germany aut NATIONALLICENCE 700 1- Hartung Wolfram Julius-von-Sachs-Institut für Biowissenschaften, Universität Würzburg, Lehrstuhl Botanik I, Mittlerer Dallenbergweg 64, D-97082 Würzburg, Germany aut NATIONALLICENCE 773 0- Journal of Experimental Botany Oxford University Press 46/8(1995-08), 881-894 0022-0957 46:8<881 1995 46 exbotj Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford