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Nuclear Ca 2+ signalling in arbuscular mycorrhizal and actinorhizal endosymbioses: on the trail of novel underground signals
Author(s) -
Barker David G.,
Chabaud Mireille,
Russo Guilia,
Genre Andrea
Publication year - 2017
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/nph.14350
Subject(s) - symbiosis , frankia , biology , botany , actinorhizal plant , arbuscular mycorrhizal fungi , mycorrhiza , glomeromycota , microbiology and biotechnology , bacteria , root nodule , genetics , immunology , inoculation
Summary Root endosymbioses are beneficial associations formed between terrestrial plants and either bacterial or fungal micro‐organisms. A common feature of these intracellular symbioses is the requirement for mutual recognition between the two partners before host‐regulated microbial entry. As part of this molecular dialogue, symbiosis‐specific microbial factors set in motion a highly conserved plant signal transduction pathway, of which a central component is the activation of sustained nuclear Ca 2+ oscillations in target cells of the host epidermis. Here, we focus on recent findings concerning this crucial Ca 2+ ‐dependent signalling step for endosymbiotic associations involving either arbuscular mycorrhizal fungi or nitrogen‐fixing Frankia actinomycetes, and in particular how this knowledge is contributing to the identification of the respective microbial factors.ContentsSummary 533 I. Introduction 533 II. Nuclear calcium reporters illuminate the path to AM fungal signalling 534 III. Ca 2+ signalling at the heart of the Frankia /actinorhizal host dialogue 536 IV. Conclusions and future outlook 536Acknowledgements 537References 537