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Article: Characterization of Four Lectin-Like Receptor Kinases Expressed in Roots of Medicago truncatula. Structure, Location, Regulation of Expression, and Potential Role in the Symbiosis with Sinorhizobium meliloti1
- Article from:
- Plant Physiology
- Article date:
- December 1, 2003
- Author:
CopyrightCopyright American Society of Plant Physiologists Dec 2003. Provided by ProQuest LLC. (Hide copyright information)
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To study the role of LecRK (lectin-like receptor kinase) genes in the legume-rhizobia symbiosis, we have characterized the four Medicago truncation Gaernt. LecRK genes that are most highly expressed in roots. Three of these genes, MtLecRK7;1, MtLecRK7;2, and MtLecRK7;3, encode proteins most closely related to the Class A LecRKs of Arabidopsis, whereas the protein encoded by the fourth gene, MtLecRK1;1, is most similar to a Class B Arabidopsis LecRK. All four genes show a strongly enhanced root expression, and detailed studies on MtLecRK1;1 and MtLecRK7;2 revealed that the levels of their mRNAs are increased by nitrogen starvation and transiently repressed after either rhizobial inoculation ...