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Metabolism and root exudation of organic acid anions under aluminium stress Braz. J. Plant Physiol.
Mariano,Eduardo D.; Jorge,Renato A.; Keltjens,Willem G.; Menossi,Marcelo.
Numerous plant species can release organic acid anions (OA) from their roots in response to toxic aluminium (Al) ions present in the rooting medium. Hypothetically OA complex Al in the root apoplast and/or rhizosphere and thus avoid its interaction with root cellular components and its entry in the root symplast. Two temporal patterns of root OA exudation are observed. In pattern I, OA release is rapidly activated after the contact of the root with Al ions while in pattern II there is a lag phase between the addition of Al and the beginning of OA release. Compounds other than OA have been detected in root exudates and are also correlated with Al resistance in plants. Plant species like buckwheat and tea show mechanisms of Al tolerance, which confer them...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Al resistance; Al toxicity; Anion channels; Root exudates; Transgenic plants.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000100013
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