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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
SymRK defines a common genetic basis for plant root endosymbioses with arbuscular mycorrhiza fungi, rhizobia, and Frankia bacteria
Proceedings of the National Academy of Sciences of the United States of America, Volume 105, No. 12, Year 2008
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Description
Root endosymbioses vitally contribute to plant nutrition and fitness worldwide. Nitrogen-fixing root nodulation, confined to four plant orders, encompasses two distinct types of associations, the interaction of legumes (Fabales) with rhizobia bacteria and actinorhizal symbioses, where the bacterial symbionts are actinomycetes of the genus Frankia. Although several genetic components of the host-symbiont interaction have been identified in legumes, the genetic basis of actinorhiza formation is unknown. Here, we show that the receptor-like kinase gene SymRK, which is required for nodulation in legumes, is also necessary for actinorhiza formation in the tree Casuarina glauca. This indicates that both types of nodulation symbiosis share genetic components. Like several other legume genes involved in the interaction with rhizobia, SymRK is also required for the interaction with arbuscular mycorrhiza (AM) fungi. We show that SymRK is involved in AM formation in C. glauca as well and can restore both nodulation and AM symbioses in a Lotus japonicus symrk mutant. Taken together, our results demonstrate that SymRK functions as a vital component of the genetic basis for both plant-fungal and plant-bacterial endosymbioses and is conserved between legumes and actinorhiza-forming Fagales. © 2008 by The National Academy of Sciences of the USA.
Authors & Co-Authors
Gherbi, Hassen
France, Montpellier
Ird Centre de Montpellier
Svistoonoff, Sergio
France, Montpellier
Ird Centre de Montpellier
Autran, Daphné
France, Montpellier
Ird Centre de Montpellier
Auguy, Florence
France, Montpellier
Ird Centre de Montpellier
Péret, Benjamin
France, Montpellier
Ird Centre de Montpellier
Laplaze, Laurent
France, Montpellier
Ird Centre de Montpellier
Franche, Claudine
France, Montpellier
Ird Centre de Montpellier
BOGUSZ, Didier
France, Montpellier
Ird Centre de Montpellier
Statistics
Citations: 271
Authors: 8
Affiliations: 2
Identifiers
Doi:
10.1073/pnas.0710618105
ISSN:
10916490
Research Areas
Food Security
Genetics And Genomics