A Ca2+/calmodulin-dependent protein kinase required for symbiotic nodule development: Gene identification by transcript-based cloning.

ABSTRACT: In the establishment of the legume-rhizobial symbiosis, bacterial lipochitooligosaccharide signaling molecules termed Nod factors activate the formation of a novel root organ, the nodule. Nod factors elicit several responses in plant root hair cells, including oscillations in cytoplasmic calcium levels (termed calcium spiking) and alterations in root hair growth. A number of plant mutants with defects in the Nod factor signaling pathway have been identified. One such Medicago truncatula mutant, dmi3, exhibits calcium spiking and root hair swelling in response to Nod factor, but fails to initiate symbiotic gene expression or cell divisions for nodule formation. On the basis of these data, it is thought that the dmi3 mutant perceives Nod factor but fails to transduce the signal downstream of

SUBMITTER: Mitra RM 

PROVIDER: S-EPMC384810 | biostudies-literature | 2004 Mar

REPOSITORIES: biostudies-literature