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Trends Plant Sci. 2008 Mar;13(3):115-20. doi: 10.1016/j.tplants.2008.01.003. Epub 2008 Mar 4.

Cytokinin: secret agent of symbiosis.

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  • 1Institut des Sciences du Végétal, Centre National de la Recherche Scientifique, 91198 Gif sur Yvette cedex, France.

Abstract

The symbiotic interaction between Rhizobium bacteria and legumes leads to the induction of a new root organ: the nitrogen-fixing nodule. Recent findings have uncovered that cytokinin is instrumental in this developmental process, but they also suggest a broader role for cytokinin in mediating rhizobial infection. In this opinion article, we propose that cytokinin is the key differentiation signal for nodule organogenesis. Furthermore, we discuss a model in which cytokinin might also influence bacterial infection by controlling the expression of NIN (Nodule Inception) and other transcriptional regulators through mechanisms operating both locally and systemically.

PMID:
18296104
[PubMed - indexed for MEDLINE]
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