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Phosphorus nutrition alleviates manganese toxicity in Lolium perenne and Trifolium repens
Author(s) -
Rosas Analí,
Rengel Zed,
Ribera Alejandra,
de La Luz Mora María
Publication year - 2011
Publication title -
journal of plant nutrition and soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 1436-8730
DOI - 10.1002/jpln.201000104
Subject(s) - trifolium repens , lolium perenne , toxicity , forage , phosphorus , shoot , manganese , repens , agronomy , lolium , chemistry , phytotoxicity , biology , poaceae , organic chemistry
Phosphorus (P) nutrition has been suggested to play a role in the alleviation of manganese (Mn) toxicity in some higher plant species. However, there are few reports on the role of P in regulating Mn accumulation by forage species. We studied the effect of P nutrition on Mn toxicity in Lolium perenne L. and Trifolium repens L. An increase in Mn concentration in root and shoot tissues was associated with an increase in both P supply and P tissue concentrations. Nevertheless, in both forage species, especially white clover, plant‐growth inhibition caused by Mn excess was decreased with increasing P additions. Moreover, the carboxylate exudation that had increased in response to high Mn was gradually reduced by increasing P supply. We suggest that P supply may have a beneficial effect in reducing the severity of Mn toxicity in forage species.