PerspectivePlant Science

GRAS Genes and the Symbiotic Green Revolution

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Science  17 Jun 2005:
Vol. 308, Issue 5729, pp. 1749-1750
DOI: 10.1126/science.1114217

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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.

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