Aluminium-phosphorus interactions in plants growing on acid soils: does phosphorus always alleviate aluminium toxicity?

Aluminium (Al) toxicity and phosphorus (P) deficiency are considered to be the main constraints for crop production in acid soils, which are widely distributed in tropical and subtropical regions. Conventionally, P addition is regarded as capable of alleviating Al toxicity in plants. However, this f...

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Bibliographic Details
Published in:Journal of the science of food and agriculture 2012-03, Vol.92 (5), p.995-1000
Main Authors: Chen, Rong Fu, Zhang, Fu Lin, Zhang, Qi Ming, Sun, Qing Bin, Dong, Xiao Ying, Shen, Ren Fang
Format: Article
Language:English
Subjects:
acid soils
Acidity
Acids
Agricultural production
Al resistance
alleviation
Aluminum
Aluminum - metabolism
Aluminum - toxicity
AlP interaction
Biological and medical sciences
Crops, Agricultural - growth & development
Crops, Agricultural - metabolism
Food industries
Fundamental and applied biological sciences. Psychology
Humans
Hydrogen-Ion Concentration
long-term AlP alternate treatment
P/Al ratio
Phosphorus
Phosphorus - metabolism
Phytotoxicity
Soil - chemistry
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Summary:Aluminium (Al) toxicity and phosphorus (P) deficiency are considered to be the main constraints for crop production in acid soils, which are widely distributed in tropical and subtropical regions. Conventionally, P addition is regarded as capable of alleviating Al toxicity in plants. However, this field is still rife with unsubstantiated theories, especially for different plant species growing on acid soils. In this review, the responses of plants to different methods of AlP treatments are briefly summarized, and possible reasons are proposed by considering recent results from our laboratory. It is shown that: (1) long‐term AlP alternate treatment is advantageous for studying AlP interactions in plants; (2) under the long‐term AlP alternate treatment, the roles of P in Al phytotoxicity might be associated with the Al resistance capability and P use efficiency of the plant, and a P/Al molar ratio exceeding 5 in roots may be the threshold of P alleviating Al toxicity based on the calculation of the tested plants; (3) in acid soils, P application may be effective only after Al stress is overcome for Al–sensitive species. Thus it is concluded that P application does not always alleviate Al toxicity under long‐term AlP alternate treatment. Copyright © 2011 Society of Chemical Industry
ISSN:0022-5142
1097-0010
DOI:10.1002/jsfa.4566