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Science 308 (5729): 1749-1750

Copyright © 2005 by the American Association for the Advancement of Science

GRAS Genes and the Symbiotic Green Revolution

Michael K. Udvardi and Wolf-Rüdiger Scheible

The symbiotic relationship between legumes and their resident nitrogen-fixing bacteria (rhizobia) begins when the plant senses the bacteria and develops a specialized nodule to house them. The signaling system that triggers nodule development is now known to activate two newly described transcription factors (Kaló et al. and Smit et al.). In their Perspective, Udvardi and Scheible explain that this new information completes a missing link and that we can now trace the molecular events from initial rhizobium detection to nodulation gene activation.

The authors are at the Max-Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Golm, Germany. E-mail: udvardi{at} (M.K.U.), scheible{at} (W.-R.S.)

A Diffusible Signal from Arbuscular Mycorrhizal Fungi Elicits a Transient Cytosolic Calcium Elevation in Host Plant Cells.
L. Navazio, R. Moscatiello, A. Genre, M. Novero, B. Baldan, P. Bonfante, and P. Mariani (2007)
Plant Physiology 144, 673-681
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