How the study of necrotrophic effectors advanced our understanding of the enigmatic PR-1 protein

Virtual seminars

Seminar given by Dr. Peter Solomon (The Australian National University). Abstract: It had long been thought that necrotrophic plant pathogenic fungi use a barrage of lytic enzymes to break down host cells releasing nutrients for growth. However, in recent years it has emerged that some necrotrophic fungi facilitate disease through a strict gene-for-gene mechanism as observed in biotrophic pathogens.

Benjamin Schwessinger https://twitter.com/schwessinger
04-20-2020

About

Presenter: Dr. Peter Solomon - The Australian National University
Date: April 20th 2020
Host: Benjamin Schwessinger
Links: Video | Slides

Abstract

It had long been thought that necrotrophic plant pathogenic fungi use a barrage of lytic enzymes to break down host cells releasing nutrients for growth. However, in recent years it has emerged that some necrotrophic fungi facilitate disease through a strict gene-for-gene mechanism as observed in biotrophic pathogens. For the wheat pathogen Parastagonospora nodorum the basis of this host specific interaction is small cysteine-rich effector proteins secreted during infection (ToxA, Tox1 and Tox3). These effectors interact with specific dominant susceptibility genes in the host leading to a programmed cell death response and disease. However, whilst we now understand the requirement of these effector proteins for disease, their modes of action remain poorly understood. In this talk I will present our latest findings on dissecting the dual functionality of the Tox3 effector protein and how this has serendipitously advanced our understanding of the enigmatic host defence protein, PR-1.

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Text and figures are licensed under Creative Commons Attribution CC BY 4.0. Source code is available at https://github.com/openplantpathology/OpenPlantPathology, unless otherwise noted. The figures that have been reused from other sources don't fall under this license and can be recognized by a note in their caption: "Figure from ...".