Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Symbiotic Competence in Lotus japonicus Is Affected by Plant Nitrogen Status: Transcriptomic Identification of Genes Affected by a New Signalling Pathway

Selim Omrane, Alberto Ferrarini, Enrica D'Apuzzo, Alessandra Rogato, Massimo Delledonne and Maurizio Chiurazzi
The New Phytologist
Vol. 183, No. 2 (Jul., 2009), pp. 380-394
Published by: Wiley on behalf of the New Phytologist Trust
Stable URL: http://www.jstor.org/stable/40302038
Page Count: 15
  • Read Online (Free)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Symbiotic Competence in Lotus japonicus Is Affected by Plant Nitrogen Status: Transcriptomic Identification of Genes Affected by a New Signalling Pathway
Preview not available

Abstract

In leguminous plants, symbiotic nitrogen (N) fixation performances and N environmental conditions are linked because nodule initiation, development and functioning are greatly influenced by the amount of available N sources. We demonstrate here that N supply also controls, beforehand, the competence of leguminous plants to perform the nodulation program. Lotus japonicus plants preincubated for 10 d in high-N conditions, and then transferred to low N before the Mesorhizobium loti inoculation, had reduced nodulation. This phenotype was maintained for at least 6 d and a complete reacquisition of the symbiotic competence was observed only after 9 d. The time-course analysis of the change of the symbiotic phenotype was analysed by transcriptomics. The differentially expressed genes identified are mostly involved in metabolic pathways. However, the transcriptional response also includes genes belonging to other functional categories such as signalling, stress response and transcriptional regulation. Some of these genes show a molecular identity and a regulation profile, that suggest a role as possible molecular links between the N-dependent plant response and the nodule organogenesis program.

Page Thumbnails

  • Thumbnail: Page 
380
    380
  • Thumbnail: Page 
381
    381
  • Thumbnail: Page 
382
    382
  • Thumbnail: Page 
383
    383
  • Thumbnail: Page 
384
    384
  • Thumbnail: Page 
385
    385
  • Thumbnail: Page 
386
    386
  • Thumbnail: Page 
387
    387
  • Thumbnail: Page 
388
    388
  • Thumbnail: Page 
389
    389
  • Thumbnail: Page 
390
    390
  • Thumbnail: Page 
391
    391
  • Thumbnail: Page 
392
    392
  • Thumbnail: Page 
393
    393
  • Thumbnail: Page 
394
    394