Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
Ann Bot. 2011 Oct;108(5):789-95. doi: 10.1093/aob/mcr205. Epub 2011 Aug 18.

Molecular mechanisms controlling legume autoregulation of nodulation.

Author information

  • 1ARC Centre of Excellence for Integrative Legume Research, School of Agriculture and Food Sciences, University of Queensland, St Lucia, Brisbane, QLD 4072, Australia.

Abstract

BACKGROUND:

High input costs and environmental pressures to reduce nitrogen use in agriculture have increased the competitive advantage of legume crops. The symbiotic relationship that legumes form with nitrogen-fixing soil bacteria in root nodules is central to this advantage.

SCOPE:

Understanding how legume plants maintain control of nodulation to balance the nitrogen gains with their energy needs and developmental costs will assist in increasing their productivity and relative advantage. For this reason, the regulation of nodulation has been extensively studied since the first mutants exhibiting increased nodulation were isolated almost three decades ago.

CONCLUSIONS:

Nodulation is regulated primarily via a systemic mechanism known as the autoregulation of nodulation (AON), which is controlled by a CLAVATA1-like receptor kinase. Multiple components sharing homology with the CLAVATA signalling pathway that maintains control of the shoot apical meristem in arabidopsis have now been identified in AON. This includes the recent identification of several CLE peptides capable of activating nodule inhibition responses, a low molecular weight shoot signal and a role for CLAVATA2 in AON. Efforts are now being focused on directly identifying the interactions of these components and to identify the form that long-distance transport molecules take.

PMID:
21856632
[PubMed - indexed for MEDLINE]
PMCID:
PMC3177682
Free PMC Article

Images from this publication.See all images (1)Free text

Fig. 1.
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for HighWire Icon for PubMed Central
    Loading ...
    Write to the Help Desk