Muneyoshi Furumoto

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where V is the volume o f the symplasts (m3), L is the relative hydraulic conductance o f the tissue (Pa -1 s 1), is the solute reflection coefficient o f the membrane, C i and C X are the osmotic concentra t ion within the symplast and the xylem vessels respectively (mole m 3), R is the gas constant ( Jmole l K--l), T is absolute temperature (K), and pi(More)
There are many contradictory observations on the mechanohydraulic relation of growing higher plant cells and tissues. Graphical analysis of the simultaneous equations which govern irreversible wall yielding and water absorption has made more comprehensive the understanding of this relation when relative growth rate is plotted against turgor pressure. It(More)
A model based on the canal theory (Katou andFurumoto 1986 a, b) is proposed for the absorption of solute and water at the root periphery. The present canal model in the periphery and the model which was previously proposed for the exudation in the stele (Katou et al. 1987), are organized into a model for radial transport across excised plant roots, in the(More)
The mechanism of water movement across roots is, as yet, not well understood. Some workable black box theories have already been proposed. They, however, assumed unrealistic cell membranes with low values of σ, or were based on a poor anatomical knowledge of roots. The role of root stele in solute and water transport seems to be especially uncertain. An(More)
Introduction: The synchronous rotation of a planetary satellite should generate a spatial variation in the crater production rate on its surface [1-9]. The production rate that has the maximum at the apex (equator, 90 ̊W) of the orbital motion of the satellite decreases with increase in angular distance from the apex and becomes the minimum at the antapex(More)
Abbreviations: CeX: the osmotic concentration of the xylem exudate (osmolm 3), Cex(px): CeX as a function of root pressure px (osmol m-3). ci: the osmotic concentration in the symplast (osmol m-3), Cs(x): the osmotic concentration of absorbable solute in the canal at x (osmolm-3), Cs(x, px): C~(x) as a function of root pressure (osmolm 3), C~V: the average(More)
The simple osmotic theory for water transport in plants has met with many difficulties, for example, in root exudation (HousE and FINDLAY 1966), osmotic adaptation (KuZMANOFF and EVANS 1981) and stem elongation (CosGROVE and CLELAND 1983). These difficulties would seem to be overcome if an active mechanism for water transport were assumed. The(More)
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