Triticum aestivumshows a greater biomass response to a supply of aluminium phosphate thanLupinus albus, despite releasing fewer carboxylates into the rhizosphere
作者： Stuart J Pearse , Erik J Veneklaas , Greg Cawthray , Mike DA Bolland , Hans Lambers
DOI: 10.1111/J.1469-8137.2005.01614.X
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摘要: Summary • The relationship between carboxylate release and the ability of plants to access phosphorus from AlPO4 detoxify aluminium was studied by comparing species with a low high rate release, Triticum aestivum (wheat) Lupinus albus (white lupin), respectively. • Species were supplied P at 10, 20, 40 or 100 mg P kg−1 sand in form sparingly soluble KH2PO4; control did not receive any P. • Triticum significantly better than L. accessing AlPO4, despite accumulating fewer carboxylates its rhizosphere. Rhizosphere pH vary level supply, while rhizosphere T. increased supplied. • Based on evidence present study, model is proposed explain poor performance albus, whereby associated protons reduces chelating exuded carboxylates, thus reducing acquisition increasing Al toxicity.
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