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Type: Journal article
Title: Characterisation of low molecular weight phytotoxins isolated from Pyrenophora teres
Author: Sarpeleh, A.
Tate, M.
Wallwork, H.
Catcheside, D.
Able, A.
Citation: Physiological and Molecular Plant Pathology, 2009; 73(6):154-162
Publisher: Academic Press Ltd
Issue Date: 2009
ISSN: 0885-5765
Statement of
Abolfazl Sarpeleh, Max E. Tate, Hugh Wallwork, David Catcheside and Amanda J. Able
Abstract: We have previously shown that pooled low molecular weight compounds (LMWCs) isolated from culture filtrates of both forms of the barley net blotch pathogen Pyrenophora teres cause chlorosis. In this study, the LMWCs were further characterised and individually identified. The LMWCs were non-host selective compounds and their activity in planta was temperature and light-dependent suggesting a role in targeting metabolism and light-dependent organelles such as the chloroplast. Although the previously characterised toxins N-(2-amino-2-carboxyethyl) aspartic acid (Toxin A), 1-(2-amino-2-carboxyethyl)-6-carboxy-3-carboxymethyl-2-piperazinone (Toxin B), and N-[2-(2-amino-2-carboxy ethyl-amino)-2-carboxyethyl] aspartic acid (Toxin C) were identified, a number of other chlorosis-causing compounds were also isolated. Here, we report the first isolation of aspergillomarasmine B from P. teres media filtrates as well as the isolation and description of a unique u.v.-absorbing phytotoxic LMWC which appears to be a reductive conjugation of the α-keto acid of phenylalanine with Toxin A. © 2009 Elsevier Ltd. All rights reserved.
Keywords: Hordeum vulgare
Net blotch
Non-selective toxins
Plant–pathogen interaction
Pyrenophora teres
Rights: Copyright © 2009 Elsevier Ltd All rights reserved.
DOI: 10.1016/j.pmpp.2009.05.003
Appears in Collections:Agriculture, Food and Wine publications
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