Figure 6.

Total Sugar Residues, Al Content in Hemicellulose, and Cell Wall Al Adsorption Kinetics.

(A) Total sugar residues in extractable hemicellulose of Col-0 and xth31 mutant. Cell wall material from Al-untreated roots was fractionated into different polysaccharide classes. Data are means ± sd. n = 4; the asterisk shows a significant difference between Col-0 and the xth31 mutant at P < 0.05 by Student’s t test.

(B) Al content in the hemicellulose of Col-0 and the xth31 mutant. Cell wall hemicellulose from Al-treated roots was assayed for Al. Data are means ± sd. n = 4. The asterisk shows a significant difference between Col-0 and the xth31 mutant at P < 0.05 by Student’s t test.

(C) Al adsorption kinetics of cell walls from Col-0 and xth31. Cell wall material from Al-untreated roots was placed into a 2-mL column and Al adsorption kinetics were monitored as previously described (Zheng et al., 2004).