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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Auxin influx activity is associated with Frankia infection during actinorhizal nodule formation in Casuarina glauca
Plant Physiology, Volume 144, No. 4, Year 2007
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Description
Plants from the Casuarinaceae family enter symbiosis with the actinomycete Frankia leading to the formation of nitrogen-fixing root nodules. We observed that application of the auxin influx inhibitor 1-naphtoxyacetic acid perturbs actinorhizal nodule formation. This suggests a potential role for auxin influx carriers in the infection process. We therefore isolated and characterized homologs of the auxin influx carrier (AUX1-LAX) genes in Casuarina glauca. Two members of this family were found to share high levels of deduced protein sequence identity with Arabidopsis (Arabidopsis thaliana) AUX-LAX proteins. Complementation of the Arabidopsis aux1 mutant revealed that one of them is functionally equivalent to AUX1 and was named CgAUX1. The spatial and temporal expression pattern of CgAUX1 promoter:β-glucuronidase reporter was analyzed in Casuarinaceae. We observed that CgAUX1 was expressed in plant cells infected by Frankia throughout the course of actinorhizal nodule formation. Our data suggest that auxin plays an important role during plant cell infection in actinorhizal symbioses. © 2007 American Society of Plant Biologists.
Authors & Co-Authors
Péret, Benjamin
France, Montpellier
L'institut Agro Montpellier
Auguy, Florence
France, Montpellier
L'institut Agro Montpellier
Collin, Myriam
France, Montpellier
L'institut Agro Montpellier
Hocher, Valérie
France, Montpellier
L'institut Agro Montpellier
Franche, Claudine
France, Montpellier
L'institut Agro Montpellier
BOGUSZ, Didier
France, Montpellier
L'institut Agro Montpellier
Bennett, Malcom J.
United Kingdom, Nottingham
University of Nottingham
Laplaze, Laurent
France, Montpellier
L'institut Agro Montpellier
Statistics
Citations: 91
Authors: 8
Affiliations: 4
Identifiers
Doi:
10.1104/pp.107.101337
ISSN:
00320889