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          Institute: MPI für bioanorganische Chemie     Collection: MPI für bioanorganische Chemie     Display Documents



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ID: 713290.0, MPI für bioanorganische Chemie / MPI für bioanorganische Chemie
Visualizing the relevance of bacterial blue- and red-light receptors during plant-pathogen interaction
Authors:Ricci, Ada; Dramis, Lucia; Shah, Rashmi; Gärtner, Wolfgang; Losi, Aba
Language:English
Date of Publication (YYYY-MM-DD):2015
Title of Journal:Environmental Microbiology Reports
Journal Abbrev.:Environ. Bicrobiol. Reports.
Volume:7
Issue / Number:5 Sp. Iss. SI
Start Page:795
End Page:802
Review Status:Internal review
Audience:Experts Only
Abstract / Description:The foliar pathogen Pseudomonas syringae pv. tomatoDC3000 (Pst) leads to consistent losses in tomato crops, urging to multiply investigations on the physiological bases for its infectiveness. As other P.syringae pathovars, Pst is equipped with photoreceptors for blue and red light, mimicking the photosensing ability of host plants. In this work we have investigated Pst strains lacking the genes for a blue-light sensing protein (PstLOV), for a bacteriophytochrome (PstBph1) or for heme-oxygenase-1. When grown in culturing medium, all deletion mutants presented a larger growth than wild-type (WT) Pst under all other light conditions, with the exception of blue light which, under our experimental conditions (photon fluence rate=40mol m(-2)s(-1)), completely suppressed the growth of the deletion mutants. Each of the knockout mutants shows stronger virulence towards Arabidopsis thaliana than PstWT, as evidenced by macroscopic damages in the host tissues of infected leaves. Mutated bacteria were also identified in districts distant from the infection site using scanning electron microscopy. These results underscore the importance of Pst photoreceptors in responding to environmental light inputs and the partial protective role that they exert towards host plants during infection, diminishing virulence and invasiveness.
Comment of the Author/Creator:Date: 2015, OCT 2015
External Publication Status:published
Document Type:Article
Version Comment:Automatic journal name synchronization
Communicated by:N. N.
Affiliations:MPI für bioanorganische Chemie
External Affiliations:[Ricci,A.; Dramis,L.; Losi,A.] Univ Parma, Dept Life Sci, I-43124 Parma, Italy
Identifiers:ISI:000363425000012 [ID No:1]
ISSN:1758-2229 [ID No:2]
DOI:10.1111/1758-2229.12320 [ID No:3]
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