Comparison between Methods using Copper, Lanthanum, and Colorimetry for the Determination of the Cation Exchange Capacity of Plant Cell Walls

2010 ◽  
Vol 58 (8) ◽  
pp. 4554-4559 ◽  
Author(s):  
J. Bernhard Wehr ◽  
F. Pax C. Blamey ◽  
Neal W. Menzies
Keyword(s):  
Cation Exchange ◽  
Plant Cell ◽  
Cell Walls ◽  
Cation Exchange Capacity ◽  
Exchange Capacity ◽  
Plant Cell Walls

Cation-exchange capacity of plant cell walls at neutral pH

1985 ◽  
Vol 36 (11) ◽  
pp. 1065-1072 ◽  
Author(s):  
Michael S. Allen ◽  
Michael I. McBurney ◽  
Peter J. Van Soest
Keyword(s):  
Cation Exchange ◽  
Plant Cell ◽  
Cell Walls ◽  
Cation Exchange Capacity ◽  
Exchange Capacity ◽  
Plant Cell Walls ◽  
Neutral Ph

Measurement of Cation Exchange Capacity (CEC) of Plant Cell Walls by X-Ray Microanalysis (EDX) in the Transmission Electron Microscope

2007 ◽  
Vol 13 (4) ◽  
pp. 233-244 ◽  
Author(s):  
Eberhard Fritz
Keyword(s):  
Electron Microscope ◽  
Cation Exchange ◽  
Plant Cell ◽  
Transmission Electron Microscope ◽  
Cell Walls ◽  
Cation Exchange Capacity ◽  
Exchange Capacity ◽  
Root Tissue ◽  
Plant Cell Walls ◽  
Transmission Electron

Cation exchange capacity (CEC) characterizes the number of fixed negative charges of plant cell walls and is an important parameter in studies dealing with the uptake of ions into plant tissues, especially in roots. Conventional methods of CEC determination use bulk tissue, the results are the mean of many cells, and differences in the CEC of different tissue types are masked. Energy-dispersive microanalysis (EDX) in the transmission electron microscope allows CEC determinations on much finer scales. Shoot and fine root tissue ofPicea abieswas acid washed to remove exchangeable cations. Tissue blocks or semithin tissue sections were loaded with 0.2 mM CaCl2, AlCl3, or Pb(NO3)2at pH 4.0. The amount of Ca, Al, or Pb adsorbed to the exchange sites of cell walls was determined by EDX. The CEC of cell walls of different tissue types was highly different, ranging in shoot tissues from 0 to 856 mM Ca and 5.8 to 1463 mM Al (block loading) or 4.3 to 1116 mM Ca and 0 to 2830 mM Al (section loading). In root tissue, Pb adsorption to semithin sections yielded CEC values between 29.1 and 954 mM Pb. In mostP. abiesshoot tissues, the binding capacity was clearly higher for Al than for Ca.

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