Accumulation of Potassium and Sodium by Barley Roots in a K-Na Replacement Series
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چکیده
منابع مشابه
Equilibrium and Ion Exchange Characteristics of Potassium and Sodium Accumulation by Barley Roots
Potassium ion and Na(+) influx and efflux rates into and from excised barley roots are compared with the maximum capacity of accumulation. Potassium ion and Na(+) influx and efflux involve a cation exchange that is independent of simultaneous exchange of the accompanying anion. These exchange fluxes depend on the concentration and cation composition of the solutions from which they originate. S...
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Steady-state rates of potassium ion and sodium ion absorption by excised barley roots accompanied by various anions were compared with the rates of anion absorption and the concomitant H(+) and base release by the roots. The cation absorption rates were found to be independent of the identities, concentrations, and rates of absorption of the anions of the external solution, including bicarbonat...
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A new series of noncyclic ionophores containing two to four furan units (Ia to IIIb) i.e. 1,1-difurylethane (Ia), 2,5-bis(methylfurfuryl)furan (IIa) and 1,1’ ethyledenebis[5-(methylfurfuryl)furan] (IIIa), 2,2-difurylpropane (Ib), 2,5-bis (dimethylfurfuryl)furan(IIb), 2,2’-isopropylidenebis[5-(dimethylfurfuryl)furan] (IIIb) have been synthesized by the condensation of furan with acetaldehyde and...
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As long as ZiveqI << 1/4, the equilibrium remains close to the "valley state." According to equations (16) and (21), this requires fairly low temperatures (,A >> 1). Specifically, in experiments on persistent currents where v (the magnetic flux quantum number) is often a very large number (-.105, say), the condition is T > 1,8 may be written in the form of an expan...
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The uptake of Na(+) and K(+) by barley seedlings grown on aerated or non-aerated solutions was studied. Plants growing in culture solution took up K(+) with high selectivity whether the solution was aerated or not. Roots of plants grown on aerated CaSO(4) and transferred to a solution of KCl and NaCl had a lower preference for K(+) than roots of plants grown on non-aerated CaSO(4). Both kinds o...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1969
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.44.11.1528