caa a22 4500 477111823 CHVBK 20180405111611.0 cr unu---uuuuu 170330e19961101xx s 000 0 eng 10.1007/BF00011658 doi (NATIONALLICENCE)springer-10.1007/BF00011658 Water transport in plants: Role of the apoplast [Elektronische Daten] [Ernst Steudle, Jürgen Frensch] The present state of modelling of water transport across plant tissue is reviewed. A mathematical model is presented which incorporates the cell-to-cell (protoplastic) and the parallel apoplastic path. It is shown that hydraulic and osmotic properties of the apoplast may contribute substantially to the overall hydraulic conductivity of tissues (Lpr) and reflection coefficients (67-1). The model shows how water and solutes interact with each other during their passage across tissues which are considered as a network of hydraulic resistors and capacitances (‘composite transport model'). Emphasis is on the fact that hydraulic properties of tissues depend on the nature of the driving force. Osmotic gradients cause a much smaller tissue Lpr than hydrostatic. Depending on the conditions, this results in variable hydraulic resistances of tissues and plant organs. For the root, the model readily explains the well-known phenomenon of variable hydraulic resistance for the uptake of water and non-linear force/flow relations. Along the cell-to-cell (protoplastic) path, water flow may be regulated by the opening and closing of selective water channels (aquaporins) which have been shown to be affected by different environmental factors. H Lambers Section editor Kluwer Academic Publishers, 1996 apoplast nationallicence cell-to-cell path nationallicence composite transport nationallicence hydraulic conductivity nationallicence root nationallicence solute transport nationallicence water channels nationallicence water transport nationallicence Steudle Ernst Lehrstuhl Pflanzenökologie, Universität Bayreuth, D-95440, Bayreuth, Germany aut Frensch Jürgen Lehrstuhl Pflanzenökologie, Universität Bayreuth, D-95440, Bayreuth, Germany aut Plant and Soil Kluwer Academic Publishers; http://www.wkap.nl 187/1(1996-11-01), 67-79 0032-079X 187:1<67 1996 187 11104 https://doi.org/10.1007/BF00011658 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00011658 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Steudle Ernst Lehrstuhl Pflanzenökologie, Universität Bayreuth, D-95440, Bayreuth, Germany aut NATIONALLICENCE 700 1- Frensch Jürgen Lehrstuhl Pflanzenökologie, Universität Bayreuth, D-95440, Bayreuth, Germany aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers; http://www.wkap.nl/ 187/1(1996-11-01), 67-79 0032-079X 187:1<67 1996 187 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer