Absence of Cu-Zn superoxide dismutase BCSOD1 reduces Botrytis cinerea virulence in Arabidopsis and tomato plants, revealing interplay among reactive oxygen species, callose and signalling pathways

Molecular Plant Pathology
Jaime López-CruzGonzález-Bosch Carmen

Abstract

Plants activate responses against pathogens, including the oxidative burst. Necrotrophic pathogens can produce reactive oxygen species (ROS) that benefit the colonization process. Previously, we have demonstrated that tomato plants challenged with Botrytis cinerea accumulate ROS and callose, together with the induction of genes involved in defence, signalling and oxidative metabolism. Here, we studied the infection phenotype of the Δbcsod1 strain in both tomato and Arabidopsis plants. This mutant lacks bcsod1, which encodes Cu-Zn superoxide dismutase (SOD). This enzyme catalyses the conversion of superoxide ion ( O2-) into hydrogen peroxide (H2 O2 ). ROS play a protective role and act as signals in plants. Δbcsod1 displayed reduced virulence compared with wild-type B05.10 in both species. Plants infected with Δbcsod1 accumulated less H2 O2 and more O2- than those infected with B05.10, which is associated with an increase in the defensive polymer callose. This supports a major role of fungal SOD in H2 O2 production during the plant-pathogen interaction. The early induction of the callose synthase gene PMR4 suggested that changes in ROS altered plant defensive responses at the transcriptional level. The metabolites and genes invo...Continue Reading

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Citations

Mar 11, 2017·Preparative Biochemistry & Biotechnology·Nathália Gonsales da Rosa-GarzonHamilton Cabral
Sep 15, 2017·The Plant Journal : for Cell and Molecular Biology·Franco R RossiNéstor Carrillo
May 17, 2019·International Microbiology : the Official Journal of the Spanish Society for Microbiology·Martzel Antsotegi-UskolaUnai Ugalde
May 27, 2020·Functional Plant Biology : FPB·Yannan ChangGang Gao
Jun 1, 2019·Journal of the Science of Food and Agriculture·Tuyet Ta BuiMark W Davey
Dec 4, 2019·Frontiers in Plant Science·Yi ZhangChengwei Li
Nov 10, 2017·Plant Cell Reports·Óscar Crespo-SalvadorCarmen González-Bosch
Oct 28, 2019·Frontiers in Plant Science·Catalina CabotCharlotte Poschenrieder
Nov 17, 2020·Frontiers in Microbiology·Ning ZhangMengjie Liu
Dec 21, 2020·Physiologia Plantarum·Yuming SunShiwei Guo

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