Aluminum Tolerance of Two Wheat Cultivars (BrevorandAtlas66) in Relation to Their Rhizosphere pH and Organic Acids Exuded from Roots

2006 ◽  
Vol 54 (26) ◽  
pp. 10033-10039 ◽  
Author(s):  
Ping Wang ◽  
Shuping Bi ◽  
Liping Ma ◽  
Weiying Han
Keyword(s):  
Organic Acids ◽  
Aluminum Tolerance ◽  
Rhizosphere Ph ◽  
Wheat Cultivars

scholarly journals Phosphorus and Aluminum Interactions in Soybean in Relation to Aluminum Tolerance. Exudation of Specific Organic Acids from Different Regions of the Intact Root System

2006 ◽  
Vol 141 (2) ◽  
pp. 674-684 ◽  
Author(s):  
Hong Liao ◽  
Huiyan Wan ◽  
Jon Shaff ◽  
Xiurong Wang ◽  
Xiaolong Yan ◽  
...  
Keyword(s):  
Organic Acids ◽  
Root System ◽  
Aluminum Tolerance ◽  
Intact Root

Differential aluminum tolerance in soybean: An evaluation of the role of organic acids

2001 ◽  
Vol 112 (2) ◽  
pp. 200-210 ◽  
Author(s):  
Ivo R. Silva ◽  
Thomas J. Smyth ◽  
C. David Raper ◽  
Thomas E. Carter ◽  
Thomas W. Rufty
Keyword(s):  
Organic Acids ◽  
Aluminum Tolerance

Effect of organic acids and NaCl on the rheological properties of dough prepared using Pembina and Harvest CWRS wheat cultivars

2018 ◽  
Vol 95 (3) ◽  
pp. 478-485 ◽  
Author(s):  
Andrea K. Stone ◽  
Ricky S. H. Lam ◽  
Erin J. Hopkins ◽  
Pierre Hucl ◽  
Martin G. Scanlon ◽  
...  
Keyword(s):  
Organic Acids ◽  
Rheological Properties ◽  
Wheat Cultivars

scholarly journals Role of exudation of organic acids and phosphate in aluminum tolerance of four tropical woody species

2003 ◽  
Vol 23 (15) ◽  
pp. 1041-1050 ◽  
Author(s):  
N. T. Nguyen ◽  
K. Nakabayashi ◽  
J. Thompson ◽  
K. Fujita
Keyword(s):  
Organic Acids ◽  
Aluminum Tolerance ◽  
Woody Species

Independence of differential aluminum tolerance inlotuson changes in rhizosphere pH or excretion of organic ligands

1990 ◽  
Vol 13 (6) ◽  
pp. 713-728 ◽  
Author(s):  
F.P.C. Blamey ◽  
D.M. Wheeler ◽  
D.C. Edmeades ◽  
R.A. Christie
Keyword(s):  
Aluminum Tolerance ◽  
Organic Ligands ◽  
Rhizosphere Ph

scholarly journals Rhizosphere pH difference regulated by plasma membrane H+-ATPase is related to differential Al tolerance of two wheat cultivars

2011 ◽  
Vol 57 (No. 5) ◽  
pp. 201-206 ◽  
Author(s):  
Y. Yang ◽  
Q.L. Wang ◽  
M.J. Geng ◽  
Z.H. Guo ◽  
Z. Zhao
Keyword(s):  
Plasma Membrane ◽  
Atpase Activity ◽  
Specific Inhibitor ◽  
Root Apex ◽  
Triticum Aestivum L ◽  
Rhizosphere Ph ◽  
Wheat Cultivars ◽  
Al Tolerance ◽  
Al Content ◽  
Tolerant Line

Aluminum (Al)-tolerance of different cultivars shows considerable differences. Elevation of rhizosphere pH is an external Al-resistant mechanism of plants. To elucidate the correlation between Al tolerance and the capacity of plants to modify the rhizosphere pH at different Al-tolerant levels, a comparative study on the wheat (Triticum aestivum L.) cultivars ET8 (Al-tolerant) and ES8 (Al-sensitive) was performed. Rhizosphere pH of ET8 was much higher than that of ES8 under the same treatment, significant correlations were obtained among all the data of rhizosphere pH and relative root elongation (R<sup>2</sup> = 0.9209**), or Al content in root apex (R<sup>2 </sup>= 0.9321**), which indicated that Al tolerance may be related to pH changes in the rhizosphere. The elevation of rhizosphere pH was inhibited by H<sup>+</sup>-ATPase specific inhibitor DCCD (dicylcohexylcarbodiimide, 25 mmol). Relative PM (plasma membrane) H<sup>+</sup>-ATPase activity of ET8 was significantly higher than that of ES8 under the same treatment. Significant correlation between all the data of relative PM H<sup>+</sup>-ATPase activity and rhizosphere pH (R<sup>2</sup> = 0.8319**) were obtained. Taken together, these results suggest that PM H<sup>+</sup>-ATPase was involved in regulating rhizosphere pH. Under Al stress, the Al-tolerant line showed a stronger capacity of up-regulating rhizosphere pH by PM H+-ATPase than the Al-sensitive line, which may explain the observed differences in Al tolerance between the two wheat cultivars.

Aluminum Tolerance of Wheat Cultivars Related to Region of Origin 1

1974 ◽  
Vol 66 (6) ◽  
pp. 751-758 ◽  
Author(s):  
C. D. Foy ◽  
H. N. Lafever ◽  
J. W. Schwartz ◽  
A. L. Fleming
Keyword(s):  
Aluminum Tolerance ◽  
Wheat Cultivars ◽  
Region Of Origin

Physiological and biochemical studies on aluminum tolerance in pineapple

Soil Research ◽  
2004 ◽  
Vol 42 (6) ◽  
pp. 699 ◽  
Author(s):  
H. Le Van ◽  
T. Masuda
Keyword(s):  
Root Growth ◽  
Organic Acids ◽  
Root Exudates ◽  
Aluminum Tolerance ◽  
Physiological Mechanism ◽  
Ananas Comosus ◽  
Tolerance Mechanism ◽  
Root Tips ◽  
Al Tolerance ◽  
Callose Formation

Aluminum is rhizotoxic and is often present in acidic soils at activities high enough to inhibit root growth. The objectives of present study were to screen for Al-sensitive and Al-tolerant pineapple (Ananas comosus (L.) Merrill) cultivars and to investigate the potential mechanism(s) of Al tolerance. Seven cultivars were analysed and found to differ considerably in Al tolerance. The cultivars Soft Touch (Al-sensitive) and Cayenne (Al-tolerant) were selected for further analysis of physiological mechanism(s) of Al tolerance. The root elongation of Soft Touch was 80% compared with 120% for Cayenne in response to 300 μm AlCl3 at pH 4.5 for 72 h. Al accumulation and Al-induced callose formation in root apices were 50 and 15% of that in Cayenne, respectively. It is clearly shown that Al only inhibited Soft Touch during the treatment, whereas it enhanced root growth of Cayenne, suggesting an Al-induced Al-tolerance mechanism operating in Cayenne. There was no significantly difference in total protein in root exudates between cultivars treated with or without 300 μm AlCl3. However, 2D SDS–PAGE analysis could detect an acidic and low molecular weight protein in Al-treated Cayenne root tips, but not in control Cayenne or in Soft Touch both in the presence and absence of Al. The identification of organic acids in collected root exudates was conducted on Al-tolerant Cayenne. Citrate, malate, and succinate were found in Cayenne root exudates, and citrate was induced by Al exposure. Changes in organic acids from root exudates and soluble protein of root tips may be involved in the Al-tolerance mechanism. Further studies are, however, needed to clarify their functions on detoxification of Al in the pineapple roots.

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