Journal article

Disease cycle of Austropuccinia psidii on Eucalyptus globulus and Eucalyptus obliqua leaves of different rust response phenotypes

WTL Yong, PK Ades, JFG Tibbits, G Bossinger, FA Runa, KS Sandhu, PWJ Taylor

PLANT PATHOLOGY | WILEY | Published : 2019

Abstract

Myrtle rust poses a significant biosecurity threat to Australia with potential for long-term damaging impacts on native flora and plant industries. This study describes the disease cycle of Austropuccinia psidii, the myrtle rust pathogen, in Eucalyptus globulus and Eucalyptus obliqua, two commercially and ecologically important species from different subgenera of Eucalyptus. Ontogeny and morphology of infection structures of A. psidii on plants of both Eucalyptus species with different rust response phenotypes, i.e. completely resistant, hypersensitive and highly susceptible, were investigated. Plants were inoculated with single-uredinium-derived urediniospores and examined by scanning elect..

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Grants

Awarded by Australian Research Council via an ARC-linkage project


Funding Acknowledgements

This project was supported by funds from the Australian Research Council via an ARC-linkage project (LP13010045) and associated partners. W.T.L.Y. received a scholarship from the Malaysian Government via the Academic Training Scheme of Public Higher Education Institutions (Skim Latihan Akademik Institut Pengajian Tinggi Awam, SLAI). The authors would like to thank Md. Abdullahil Baki Bhuiyan, Roger Curtain, Simon Crawford and Alice Gower for their technical support during the experiments and Robert Park for having made available the specialized rust glasshouse facilities at the University of Sydney. Scanning electron microscopy was performed at the Bio21 Advanced Microscopy Facility, the University of Melbourne. The authors also declare that they have no conflict of interest.