Handbook of Plant and Crop Physiology
Electrochemical potential difference:The driving force for the transport of solutes across plant cell membranes. It is the elect ...
After equilibration of the external solution with the free space, the electrochemical potential differ- ences of cations and ani ...
The diffusion potential depends on the relative permeabilities of all the cations and anions in the sys- tem. Equation (4), the ...
rived from Eq. (2). On assuming equilibrium, namely j0, and substituting EMfor (io), Eq. (2) becomes 0 2.3RTloga a j o ...
A. Channels Structure and Basic Properties Channels are multisubunit proteins that span the membrane. They allow passive fluxe ...
ing in the open conformation. The relation between the amount of current flowing through the membrane at different membrane pote ...
Ca^2 CHANNELS Depolarization-activated, Ca^2 -selective channels were described [44]. Ca^2 channels have been implicated in ...
constants of the reactions. Assuming that k 3 is much smaller than k 1 , the transport velocity (v), or influx, is given by vk ...
The plasma membrane H-ATPase forms a phosphorylated intermediate during ATP hydrolysis and belongs to the P-ATPase family [92]. ...
[111]. Phytochelatins are glutathione-derived peptides (poly -glutamylcystein followed by a C-terminal glycine) [112]. PYROPHOSP ...
Substitution of EMfor (io) and division by Fresults in 2.3 F RT loga a j o ij zjEMn(EM 60 pH) When we define pjl ...
affinity transporter may be needed when the Kconcentration in the soil solution is less than 1.0 mM [134]. At much more negativ ...
nitude of the pH. Phosphate transport into the vesicles was also mediated by a negative (inside) electri- cal gradient (negativ ...
Uptake of Heavy Metals Genes encoding proteins involved in the transport of copper, manganese, zinc, and iron have been iden- ...
sis or decomposition of organic acids accomplishes such regulation in response to nonstoichiometric an- ion and cation absorptio ...
VII. TRANSPORT TO THE SHOOT Since the classical experiments of Stout and Hoagland [178], it has been accepted that mineral ions ...
also utilize these latter pathways. Most of the Ca^2 that enters the symplast via Ca^2 channels is se- questered in the vacuol ...
HH Ussing. The distinction by means of tracers between active transport and diffusion. Acta Physiol Scand 19:43–56, 1949. U Lüt ...
JA Anderson, SS Huprikar, LV Kochian, WJ Lucas, RF Gaber. Functional expression of a probable Ara- bidopsis thalianapotassium c ...
LI Bruggemann, II Pottosin, G Schonknecht. Selectivity of the fast activating vacuolar cation channel. J Exp Bot 50:873–876, 19 ...
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