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Aluminium–phosphorus interactions in plants growing on acid soils: does phosphorus always alleviate aluminium toxicity?
Author(s) -
Chen Rong Fu,
Zhang Fu Lin,
Zhang Qi Ming,
Sun Qing Bin,
Dong Xiao Ying,
Shen Ren Fang
Publication year - 2011
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.4566
Subject(s) - phosphorus , toxicity , soil water , phytotoxicity , aluminium , chemistry , crop , soil ph , phosphorus deficiency , environmental chemistry , agronomy , environmental science , biology , soil science , organic chemistry
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 AlP treatments are briefly summarized, and possible reasons are proposed by considering recent results from our laboratory. It is shown that: (1) long‐term AlP alternate treatment is advantageous for studying AlP interactions in plants; (2) under the long‐term AlP 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 AlP alternate treatment. Copyright © 2011 Society of Chemical Industry