Calcium Signalling in Plant Biotic Interactions

Didier Aldon (1) , Malick Mbengue (1) , Christian Mazars (2) , Jean-Philippe Galaud (1)

1 Signalisation Calcique et Immunité Végétale
2 LRSV - Laboratoire de Recherche en Sciences Végétales

Calcium (Ca 2+) is a universal second messenger involved in various cellular processes, leading to plant development and to biotic and abiotic stress responses. Intracellular variation in free Ca 2+ concentration is among the earliest events following the plant perception of environmental change. These Ca 2+ variations differ in their spatio-temporal properties according to the nature, strength and duration of the stimulus. However, their conversion into biological responses requires Ca 2+ sensors for decoding and relaying. The occurrence in plants of calmodulin (CaM) but also of other sets of plant-specific Ca 2+ sensors such as calmodulin-like proteins (CMLs), Ca 2+-dependent protein kinases (CDPKs) and calcineurin B-like proteins (CBLs) indicate that plants possess specific tools and machineries to convert Ca 2+ signals into appropriate responses. Here, we focus on recent progress made in monitoring the generation of Ca 2+ signals at the whole plant or cell level and their long distance propagation during biotic interactions. The contribution of CaM/CMLs and CDPKs in plant immune responses mounted against bacteria, fungi, viruses and insects are also presented.

Mots clés: Biotic stress responses; Calcium; Calcium signature; Calmodulin; CMLs; CDPKs; Plant immunity; Symbiosis

Domaines: Biologie végétale

Didier Aldon, Malick Mbengue, Christian Mazars, Jean-Philippe Galaud. Calcium Signalling in Plant Biotic Interactions. International Journal of Molecular Sciences, 2018, 19 (3), pp.665. ⟨10.3390/ijms19030665⟩. ⟨hal-02322737⟩