Document Detail

Variation of wheat root exudates under aluminum stress.
MedLine Citation:
PMID:  17177539     Owner:  NLM     Status:  MEDLINE    
The wheat (Triticum aestivum L.) cultivar Yangzhou 158 was used as a reference. The wheat root exudates were collected using a hydroponic mode. The changes of the electrolytes, H+, sugar, organic acids, amino acids, and secondary metabolites in wheat root exudates induced by aluminum (Al) were studied. The research results show that Al stress affects wheat root exudation. The secreted electrolytes and sugar increase with the increasing of the external Al3+ concentration. The total amount of secreted amino acids has a specific correlation with the external Al3+ concentration. At first, the amino acids secrete normally, but when Al3+ concentration is over 10 mg.L-1, the amino acid constitution varies obviously. Under Al stress, some original secondary metabolites disappear gradually, and other new secondary metabolites release simultaneously. Increasing the external Al3+ concentration gradually stimulates the exudation of organic acids. The organic acid levels in the wheat root zone increase in response to Al treatments. Active Al ions are accumulated in wheat roots. This Al-dependent variation in wheat root exudates suggests a specific Al-induced response of the wheat.
Ping Wang; Shuping Bi; Shi Wang; Qiuyan Ding
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  54     ISSN:  0021-8561     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2006 Dec 
Date Detail:
Created Date:  2006-12-20     Completed Date:  2007-03-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  10040-6     Citation Subset:  IM    
School of Chemistry and Chemical Engineering, State Key Laboratory of Pollution Control and Resource Reuse of China & Key Laboratory of MOE for Life Science, Nanjing University, Nanjing 210093, China.
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MeSH Terms
Aluminum / analysis,  pharmacology*
Amino Acids / metabolism
Carbohydrate Metabolism / drug effects
Electrolytes / metabolism
Hydrogen-Ion Concentration
Plant Roots / chemistry,  drug effects*,  metabolism*
Triticum / drug effects*,  metabolism*
Reg. No./Substance:
0/Amino Acids; 0/Electrolytes; 7429-90-5/Aluminum

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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