A Survey of Wild Indigenous Cryptostylis ovata Orchid Populations in Western Australia Reveals Spillover of Exotic Viruses

Stephen Wylie; Hua Li; Shu Hui Koh

doi:10.3390/v17010108

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A Survey of Wild Indigenous Cryptostylis ovata Orchid Populations in Western Australia Reveals Spillover of Exotic Viruses

Journal article

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Peer reviewed

A Survey of Wild Indigenous Cryptostylis ovata Orchid Populations in Western Australia Reveals Spillover of Exotic Viruses

Stephen Wylie, Hua Li and Shu Hui Koh

Viruses, Vol.17(1), 108

2025

DOI: https://doi.org/10.3390/v17010108

PMID: 39861897

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Abstract

Orchidaceae - virology

Phylogeny

Plant Diseases - virology

Plant Viruses - classification

Plant Viruses - genetics

Plant Viruses - isolation & purification

RNA Viruses - classification

RNA Viruses - genetics

RNA Viruses - isolation & purification

RNA, Viral - genetics

Western Australia

Cryptostylis ovata is a terrestrial orchid endemic to southwestern Australia. The virus status of C. ovata has not been studied. Eighty-three C. ovata samples from 16 populations were collected, and sequencing was used to identify RNA viruses from them. In one population, all tested plants were co-infected with isolates of the exotic-to-Australia viruses Ornithogalum mosaic virus (OrMV) and bean yellow mosaic virus (BYMV). In another population, one plant was infected with BYMV. No viruses were detected in the remaining populations. The OrMV isolate shared 98–99% nucleotide identity with isolates identified from wild indigenous Lachenalia (Iridaceae) plants in South Africa. This suggests that the source of OrMV in C. ovata may be one or more bulbous iridaceous flowering plants of southern African origin that were introduced to Western Australia as ornamentals and that have since become invasive weeds. One BYMV isolate from C. ovata also exhibited 99% nucleotide identity with strains isolated from the exotic leguminous crop Lupinus angustifolius in Western Australia, suggesting possible spillover to indigenous species from this source. This study with C. ovata highlights the probable role of invasive weeds and exotic crops as sources of exotic virus spillovers to indigenous plants.

Details

Title: A Survey of Wild Indigenous Cryptostylis ovata Orchid Populations in Western Australia Reveals Spillover of Exotic Viruses
Authors/Creators: Stephen Wylie - Food Futures Institute, Murdoch University, 90 South Street, Perth 6150, Australia
Hua Li - Food Futures Institute, Murdoch University, 90 South Street, Perth 6150, Australia
Shu Hui Koh - Murdoch University, School of Medical, Molecular and Forensic Sciences
Publication Details: Viruses, Vol.17(1), 108
Publisher: MDPI
Number of pages: 9
Grant note: 340/21 / Australian Orchid Foundation
Identifiers: 991005737344207891
Murdoch Affiliation: School of Medical, Molecular and Forensic Sciences
Language: English
Resource Type: Journal article

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Citation topics: 3 Agriculture, Environment & Ecology; 3.267 Virology - Plant; 3.267.356 Plant Virus Interactions
Web Of Science research areas: Virology
ESI research areas: Microbiology