First Report of Myrtle Rust Caused by Austropuccinia psidii on Rhodomyrtus tomentosa (Myrtaceae) from Singapore
2017; American Phytopathological Society; Volume: 101; Issue: 9 Linguagem: Inglês
10.1094/pdis-04-17-0530-pdn
ISSN1943-7692
AutoresEmmerentia Du Plessis, Alistair R. McTaggart, G. M. Granados, M. J. Wingfield, Jolanda Roux, Mohamed Ismail Mohamed Ali, Geoff S. Pegg, Jeffrey R. Makinson, Matthew F. Purcell,
Tópico(s)Plant Pathogens and Resistance
ResumoHomePlant DiseaseVol. 101, No. 9First Report of Myrtle Rust Caused by Austropuccinia psidii on Rhodomyrtus tomentosa (Myrtaceae) from Singapore PreviousNext DISEASE NOTES OPENOpen Access licenseFirst Report of Myrtle Rust Caused by Austropuccinia psidii on Rhodomyrtus tomentosa (Myrtaceae) from SingaporeE. du Plessis, A. R. McTaggart, G. M. Granados, M. J. Wingfield, J. Roux, M. I. M. Ali, G. S. Pegg, J. Makinson, and M. PurcellE. du PlessisSearch for more papers by this author, A. R. McTaggartSearch for more papers by this author, G. M. GranadosSearch for more papers by this author, M. J. WingfieldSearch for more papers by this author, J. RouxSearch for more papers by this author, M. I. M. AliSearch for more papers by this author, G. S. PeggSearch for more papers by this author, J. MakinsonSearch for more papers by this author, and M. PurcellSearch for more papers by this authorAffiliationsAuthors and Affiliations E. du Plessis A. R. McTaggart G. M. Granados M. J. Wingfield J. Roux , Department of Plant and Soil Sciences, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, Pretoria, South Africa M. I. M. Ali , Phytopathology & Integrated Pest Management Section, Plant Health Laboratory Department, Agri-Food & Veterinary Authority, Singapore G. S. Pegg , Department of Agriculture and Fisheries, Ecosciences Precinct, Dutton Park, Queensland, Australia J. Makinson M. Purcell , CSIRO Health and Biosecurity, Ecosciences Precinct, Dutton Park, Queensland, Australia. Published Online:16 Jun 2017https://doi.org/10.1094/PDIS-04-17-0530-PDNAboutSections ToolsAdd to favoritesDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InRedditEmailWechat Austropuccinia psidii (formerly Puccinia psidii) causes rust on species of Myrtaceae. Since 2006, different genotypes of A. psidii have spread to countries in the Pacific and to South Africa (Roux et al. 2016). The pathogen was recently discovered on Eucalyptus pellita and Melaleuca leucadendra in Indonesia (McTaggart et al. 2015). Three suspected specimens of A. psidii were collected in August 2016 from Singapore on leaves of Rhodomyrtus tomentosa (Myrtaceae), a tree native to southeastern Asia. The symptoms were the same as those caused by this pathogen with unmistakable yellow pustules of uredinia on the young leaves and inflorescences. The specimens were lodged in the PREM herbarium, South Africa (PREM 61592, 61593, 61594). Uredinia and telia were present on the abaxial leaf surface of PREM 61592. Urediniospores were ellipsoid to obovoid, 19 to 24 × 16 to 21 µm; wall 1.5 to 2.0 µm thick, finely echinulate. Teliospores were cylindrical or ellipsoidal, 2-celled, apex rounded, pale yellowish brown, (29–) 35 to 45 (–50) × 16 to 23 µm; wall 1 to 2 µm thick, smooth; pedicel up to 15 µm long. This was morphologically similar to the description of A. psidii in Australia (available at: http://collections.daff.qld.gov.au/web/key/rustfungi/Media/Html/pucciniapsidii.html) (Shivas et al. 2014). A DNA sequence-based identification was made using the internal transcribed spacer (ITS) and large subunit (LSU) regions of ribosomal DNA. The ITS sequences were 99% identical (551 out of 555 base pairs) to KM282154, the epitype sequence of A. psidii (Machado et al. 2015). The ITS and LSU sequences had 99 to 100% identity to specimens from Indonesia, with one degenerate base pair difference in the ITS region (McTaggart et al. 2015). The sequences obtained were deposited in GenBank as KY816929 and KY816930. The genotype of the isolates from Singapore was not determined, but may be the same as in Indonesia (McTaggart et al. 2015), which has the pandemic strain, so named due to its spread through the Pacific. This report of A. psidii in Singapore may indicate the rust will spread further through Southeast Asia, into countries such as Malaysia and Thailand.References:Machado, P. S., et al. 2015. Trop. Plant Pathol. 40:5. https://doi.org/10.1007/s40858-014-0002-8 Crossref, ISI, Google ScholarMcTaggart, A. R., et al. 2015. Australas. Plant Pathol. 45:83. https://doi.org/10.1007/s13313-015-0386-z Crossref, ISI, Google ScholarRoux, J., et al. 2016. Australas. Plant Pathol. 45:645. https://doi.org/10.1007/s13313-016-0447-y Crossref, ISI, Google ScholarShivas, R. G., et al. 2014. IMA Fungus 5:195. https://doi.org/10.5598/imafungus.2014.05.02.03 Crossref, ISI, Google ScholarDetailsFiguresLiterature CitedRelated Vol. 101, No. 9 September 2017SubscribeISSN:0191-2917e-ISSN:1943-7692 Metrics Article History Issue Date: 14 Aug 2017Published: 16 Jun 2017First Look: 22 May 2017Accepted: 15 May 2017 Pages: 1676-1676 Information© 2017 The American Phytopathological SocietyCited byMyrtaceae in Australia: Use of Cryobiotechnologies for the Conservation of a Significant Plant Family under Threat8 April 2022 | Plants, Vol. 11, No. 8Austropuccinia psidii (myrtle rust)CABI Compendium, Vol. CABI CompendiumEvaluating the efficacy of potential fungicide-adjuvant combinations for control of myrtle rust in New Zealand31 August 2021 | Journal of Plant Diseases and Protection, Vol. 128, No. 6A new, highly aggressive race of Austropuccinia psidii infects a widely planted, myrtle rust‐resistant, eucalypt genotype in Brazil2 March 2021 | Forest Pathology, Vol. 51, No. 2The global threat of Myrtle rust (AUSTROPUCCINIA psidii): Future prospects for control and breeding resistance in susceptible hostsCrop Protection, Vol. 136Conservation in the wake of myrtle rust – a case study on two critically endangered Australian rainforest plantsPacific Conservation Biology, Vol. 26, No. 3Projecting the suitability of global and local habitats for myrtle rust ( Austropuccinia psidii ) using model consensus14 November 2019 | Plant Pathology, Vol. 69, No. 1The pandemic strain of Austropuccinia psidii causes myrtle rust in New Zealand and Singapore9 February 2019 | Australasian Plant Pathology, Vol. 48, No. 3Lessons from the Incursion of Myrtle Rust in AustraliaAnnual Review of Phytopathology, Vol. 56, No. 1The risk to Myrtaceae of Austropuccinia psidii, myrtle rust, in Mexico24 March 2018 | Forest Pathology, Vol. 48, No. 4Molecular Genetic Approaches Toward Understanding Forest-Associated Fungi and Their Interactive Roles Within Forest Ecosystems4 May 2018 | Current Forestry Reports, Vol. 4, No. 2Detecting myrtle rust ( Austropuccinia psidii ) on lemon myrtle trees using spectral signatures and machine learning13 February 2018 | Plant Pathology, Vol. 67, No. 5Impact of Austropuccinia psidii in New Caledonia, a biodiversity hotspot2 December 2017 | Forest Pathology, Vol. 48, No. 2Genetic diversity of the myrtle rust pathogen ( Austropuccinia psidii ) in the Americas and Hawaii: Global implications for invasive threat assessments12 September 2017 | Forest Pathology, Vol. 48, No. 1Impact of Austropuccinia psidii (myrtle rust) on Myrtaceae-rich wet sclerophyll forests in south east Queensland21 November 2017 | PLOS ONE, Vol. 12, No. 11
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