Manipulation of cytokinin level in the ergot fungus Claviceps purpurea emphasizes its contribution to virulence

Manipulation of cytokinin level in the ergot fungus Claviceps purpurea emphasizes its... Pathogen-derived cytokinins (CKs) have been recognized as important virulence factor in several host–pathogen interac- tions and it was demonstrated multiple times that phytopathogenic fungi form CKs via the tRNA degradation pathway. In contrast to previous studies, the focus of this study is on the second step of CK formation and CK degradation to improve our understanding of the biosynthesis in fungi on the one hand, and to understand CK contribution to the infection process of Claviceps purpurea on the other hand. The ergot fungus Claviceps purpurea is a biotrophic phytopathogen with a broad host range including economically important crops causing harvest intoxication upon infection. Its infection process is restricted to unfertilized ovaries without causing macroscopic defense symptoms. Thus, sophisticated host manipulation strategies are implicated. The cytokinin (CK) plant hormones are known to regulate diverse plant cell processes, and several plant pathogens alter CK levels during infection. C. purpurea synthesizes CKs via two mechanisms, and fungus-derived CKs influence the host–pathogen interaction but not fungus itself. CK deficiency in fungi with impact on virulence has only been achieved to date by deletion of a tRNA-ipt gene that is also involved in a process of translation regulation. To obtain a better understanding http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Current Genetics Springer Journals

Manipulation of cytokinin level in the ergot fungus Claviceps purpurea emphasizes its contribution to virulence

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2018 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Life Sciences; Microbial Genetics and Genomics; Microbiology; Biochemistry, general; Cell Biology; Plant Sciences; Proteomics
ISSN
0172-8083
eISSN
1432-0983
D.O.I.
10.1007/s00294-018-0847-3
Publisher site
See Article on Publisher Site

Abstract

Pathogen-derived cytokinins (CKs) have been recognized as important virulence factor in several host–pathogen interac- tions and it was demonstrated multiple times that phytopathogenic fungi form CKs via the tRNA degradation pathway. In contrast to previous studies, the focus of this study is on the second step of CK formation and CK degradation to improve our understanding of the biosynthesis in fungi on the one hand, and to understand CK contribution to the infection process of Claviceps purpurea on the other hand. The ergot fungus Claviceps purpurea is a biotrophic phytopathogen with a broad host range including economically important crops causing harvest intoxication upon infection. Its infection process is restricted to unfertilized ovaries without causing macroscopic defense symptoms. Thus, sophisticated host manipulation strategies are implicated. The cytokinin (CK) plant hormones are known to regulate diverse plant cell processes, and several plant pathogens alter CK levels during infection. C. purpurea synthesizes CKs via two mechanisms, and fungus-derived CKs influence the host–pathogen interaction but not fungus itself. CK deficiency in fungi with impact on virulence has only been achieved to date by deletion of a tRNA-ipt gene that is also involved in a process of translation regulation. To obtain a better understanding

Journal

Current GeneticsSpringer Journals

Published: May 30, 2018

References

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