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Life Sciences Commons

Open Access. Powered by Scholars. Published by Universities.®

2004

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University of Massachusetts Amherst

Elsbeth Walker

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Full-Text Articles in Life Sciences

Yellow Stripe1. Expanded Roles For The Maize Iron-Phytosiderophore Transporter, Elsbeth Walker, L. A. Roberts, A. J. Pierson, Z Panaviene Jan 2004

Yellow Stripe1. Expanded Roles For The Maize Iron-Phytosiderophore Transporter, Elsbeth Walker, L. A. Roberts, A. J. Pierson, Z Panaviene

Elsbeth Walker

Graminaceous monocots, including most of the world's staple grains (i.e. rice, corn, and wheat) use a chelation strategy (Strategy II) for primary acquisition of iron from the soil. Strategy II plants secrete phytosiderophores (PS), compounds of the mugineic acid family that form stable Fe(III) chelates in soil. Uptake of iron-PS chelates, which occurs through specific transporters at the root surface, thus represents the primary route of iron entry into Strategy II plants. The gene Yellow stripe1 (Ys1) encodes the Fe(III)-PS transporter of maize (Zea mays). Here the physiological functions performed by maize YS1 were further ...