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Plant innate immunity--sunny side up?

ABSTRACT: Reactive oxygen species (ROS)- and calcium- dependent signaling pathways play well-established roles during plant innate immunity. Chloroplasts host major biosynthetic pathways and have central roles in energy production, redox homeostasis, and retrograde signaling. However, the organelle's importance in immunity has been somehow overlooked. Recent findings suggest that the chloroplast also has an unanticipated function as a hub for ROS- and calcium-signaling that affects immunity responses at an early stage after pathogen attack. In this opinion article, we discuss a chloroplastic calcium-ROS signaling branch of plant innate immunity. We propose that this chloroplastic branch acts as a light-dependent rheostat that, through the production of ROS, influences the severity of the immune response.

SUBMITTER: Stael S

PROVIDER: S-EPMC4817832 | biostudies-literature | 2015 Jan

REPOSITORIES: biostudies-literature

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Plant innate immunity--sunny side up?

Stael Simon S Kmiecik Przemyslaw P Willems Patrick P Van Der Kelen Katrien K Coll Nuria S NS Teige Markus M Van Breusegem Frank F

Trends in plant science 20141029 1

Reactive oxygen species (ROS)- and calcium- dependent signaling pathways play well-established roles during plant innate immunity. Chloroplasts host major biosynthetic pathways and have central roles in energy production, redox homeostasis, and retrograde signaling. However, the organelle's importance in immunity has been somehow overlooked. Recent findings suggest that the chloroplast also has an unanticipated function as a hub for ROS- and calcium-signaling that affects immunity responses at a ...[more]

PMID: 25457110

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