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Signalling mechanisms integrating root and shoot responses to changes in the nitrogen supply.

Walch-Liu, Pia and Filleur, Sophie and Gan, Yinbo B. and Forde, Brian G. (2005) Signalling mechanisms integrating root and shoot responses to changes in the nitrogen supply. Photosynthesis Research, 83 (2). pp. 239-250. ISSN 0166-8595

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Abstract

During their life cycle, plants must be able to adapt to wide variations in the supply of soil nitrogen (N). Changes in N availability, and in the relative concentrations of NO3 −and NH4 +, are known to have profound regulatory effects on the N uptake systems in the root, on C and N metabolism throughout the plant, and on root and shoot morphology. Optimising the plant’s responses to fluctuations in the N supply requires co-ordination of the pathways of C and N assimilation, as well as establishment of the appropriate allocation of resources between root and shoot growth. Achieving this integration of responses at the whole plant level implies long-distance signaling mechanisms that can communicate information about the current availability of N from root-to-shoot, and information about the C/N status of the shoot in the reverse direction. In this review we will discuss recent advances which have contributed to our understanding of these long-range signaling pathways.

Item Type: Article
Journal or Publication Title: Photosynthesis Research
Uncontrolled Keywords: abscisic acid - auxin - cytokinin - leaf expansion - nitrate - nodulation - root development - shoot ; root ratio
Subjects: Q Science > QH Natural history > QH301 Biology
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 8925
Deposited By: Prof Brian G Forde
Deposited On: 19 May 2008 12:02
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 18:28
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/8925

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