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Phytochemistry. 2007 Jan;68(1):122-9. Epub 2006 Nov 15.

Arbuscular mycorrhizal symbiosis and plant aquaporin expression.

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Darmstadt University of Technology, Institute of Botany, Applied Plant Sciences, Schnittspahnstrasse 10, D-64287 Darmstadt, Germany.


Almost all land plants have developed a symbiosis with arbuscular mycorrhizal fungi. Establishment of the association is accompanied by structural changes in the plant root. During arbuscule formation fungal hyphae penetrate the root apoplast and install highly specialized interfaces for solute transport between plant and fungus. The periarbuscular membrane which is part of the plant plasma membrane surrounding arbuscular structures was shown to harbour a high density of different transport systems. Among these also expression of aquaporins was described, which potentially can act as a low affinity transport system for ammonia or ammonium. The present study provides data for expression, localization and function of plant aquaporins in the periarbuscular membrane of mycorrhizal Medicago truncatula plants.

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