Autoregulation of nodulation (AON) in Pisum sativum (pea) involves signalling events associated with both nodule primordia development and nitrogen fixation

Li, DX, Kinkema, M and Gresshoff, PM (2009) Autoregulation of nodulation (AON) in Pisum sativum (pea) involves signalling events associated with both nodule primordia development and nitrogen fixation. Journal of Plant Physiology, 166 9: 955-967. doi:10.1016/j.jplph.2009.03.004


Author Li, DX
Kinkema, M
Gresshoff, PM
Title Autoregulation of nodulation (AON) in Pisum sativum (pea) involves signalling events associated with both nodule primordia development and nitrogen fixation
Formatted title
Autoregulation of nodulation (AON) in Pisum sativum (pea) involves signalling events associated with both nodule primordia development and nitrogen fixation
Journal name Journal of Plant Physiology   Check publisher's open access policy
ISSN 0176-1617
Publication date 2009-06-01
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.jplph.2009.03.004
Open Access Status
Volume 166
Issue 9
Start page 955
End page 967
Total pages 13
Editor Franz Hoffmann
Place of publication Germany
Publisher Elsevier
Language eng
Subject C1
820503 Grain Legumes
820405 Soybeans
829899 Environmentally Sustainable Plant Production not elsewhere classified
060702 Plant Cell and Molecular Biology
060703 Plant Developmental and Reproductive Biology
060111 Signal Transduction
Abstract To define the signalling events required for the activation of AON, we utilised approach grafts between wild-type pea plants and their mutants defective at successive stages of nodule formation. AON signalling strength was monitored by prior inoculation of mutant root portions (as so-called 'sensor') and quantifying nodule formation on connected roots of delayed inoculated wild type (the 'reporter'). Detectable AON sensing and associated signal exchange between root and shoot started after root hair curling but before the initiation of visible cortical and pericycle cell divisions. The strength of AON signalling was correlated with the stage of nodule development and size of nodule, with mature nitrogen-fixing nodules possessing the strongest AON-inducing signal. We demonstrated that the pea supernodulating mutant nod3 may function pre-NARK in the root. A model for the activation of AON signalling and its potential relationship with cell division, nitrogen fixation and/or cytokinin signal transduction are presented.
Keyword Approach-grafting
Max L Merr
Cortical cell division
Legume Lotus japonicus
Receptor-like Kinase
Glycine max
Medicago truncatula
Split root
White clover
Supernodulating mutant
Arbuscular mycorrhizae
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Centre for Integrative Legume Research Publications
2010 Higher Education Research Data Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 29 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 03 Sep 2009, 18:04:20 EST by Mr Andrew Martlew on behalf of Centre for Integrative Legume Research