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Phytotoxins produced by plant pathogenic S treptomyces species
Author(s) -
Bignell D.R.D.,
Fyans J.K.,
Cheng Z.
Publication year - 2014
Publication title -
journal of applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 1364-5072
DOI - 10.1111/jam.12369
Subject(s) - phytotoxin , coronatine , streptomyces , common scab , biology , pseudomonas syringae , streptomycetaceae , microbiology and biotechnology , botany , pathogen , bacteria , actinomycetales , toxin , arabidopsis , biochemistry , gene , genetics , mutant
SummaryS treptomyces is a large genus consisting of soil‐dwelling, filamentous bacteria that are best known for their capability of producing a vast array of medically and agriculturally useful secondary metabolites. In addition, a small number of S treptomyces spp. are capable of colonizing and infecting the underground portions of living plants and causing economically important crop diseases such as potato common scab ( CS ). Research into the mechanisms of S treptomyces plant pathogenicity has led to the identification and characterization of several phytotoxic secondary metabolites that are known or suspected of contributing to diseases in various plants. The best characterized are the thaxtomin phytotoxins, which play a critical role in the development of CS , acid scab and soil rot of sweet potato. In addition, the best‐characterized CS ‐causing pathogen, S treptomyces scabies, produces a molecule that is predicted to resemble the P seudomonas syringae coronatine phytotoxin and which contributes to seedling disease symptom development. Other S treptomyces phytotoxic secondary metabolites that have been identified include concanamycins, FD ‐891 and borrelidin. Furthermore, there is evidence that additional, unknown metabolites may participate in S treptomyces plant pathogenicity. Such revelations have implications for the rational development of better management procedures for controlling CS and other S treptomyces plant diseases.