In:
Scientific Reports, Springer Science and Business Media LLC, Vol. 7, No. 1 ( 2017-08-01)
Abstract:
Calcium signalling mediated by Calmodulin (CaM) and calmodulin-like (CML) proteins is critical to plant immunity. CaM and CML regulate a wide range of target proteins and cellular responses. While many CaM-binding proteins have been identified, few have been characterized for their specific role in plant immunity. Here, we report new data on the biological function of a CML-interacting partner, PRR2 ( PSEUDO-RESPONSE REGULATOR 2 ), a plant specific transcription factor. Until now, the physiological relevance of PRR2 remained largely unknown. Using a reverse genetic strategy in A . thaliana , we identified PRR2 as a positive regulator of plant immunity. We propose that PRR2 contributes to salicylic acid (SA)-dependent responses when challenged with the phytopathogenic bacterium Pseudomonas syringae . PRR2 is transcriptionally upregulated by SA and P . syringae , enhances SA biosynthesis and SA signalling responses; e . g . in response to P . syringae , PRR2 induces the production of SA and the accumulation of the defence-related protein PR1. Moreover, PRR2 overexpressing lines exhibit an enhanced production of camalexin, a phytoalexin that confers enhanced resistance against pathogens. Together, these data reveal the importance of PRR2 in plant immune responses against P . syringae and suggest a novel function for this particular plant specific transcription factor in plant physiology.
Type of Medium:
Online Resource
ISSN:
2045-2322
DOI:
10.1038/s41598-017-07535-8
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2017
detail.hit.zdb_id:
2615211-3
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