Peronosclerospora australiensis sp. nov. and Peronosclerospora sargae sp. nov., two newly recognised downy mildews in northern Australia, and their biosecurity implications

Shivas, R. G. and Ryley, M. J . and Telle, S. and Liberato, J. R. and Thines, M. (2012) Peronosclerospora australiensis sp. nov. and Peronosclerospora sargae sp. nov., two newly recognised downy mildews in northern Australia, and their biosecurity implications. Australasian Plant Pathology, 41 (2). pp. 125-130. ISSN 0815-3191

Abstract

Morphological examination, supported by unnamed phylogenetic lineages found previously from DNA sequence analysis, revealed the presence of two new downy mildews on native Sorghum spp. in northern Australia. These species are formally described and illustrated as Peronosclerospora australiensis sp. nov. and Peronosclerospora sargae sp. nov. One of these species, P. australiensis,was also found on cultivated maize. Oospores of P.australiensis were present on shredded leaves of the native Sorghum spp., and conidia and conidiophores were found on maize leaves with chlorotic streaks. We review earlier reports of downy mildew on maize and native Sorghum species in northern Australia and show that many of these records represent P. australiensis. The biosecurity implications of the absence of some downy mildews on grasses from Australia as well as the detection of new cryptic species are discussed.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2011 Australasian Plant Pathology Society Inc. Published version deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 05 Jun 2014 01:50
Last Modified: 22 Mar 2017 01:38
Uncontrolled Keywords: quarantine; sarga; sorghum timorense; sorghum plumosum; taxonomy; zea mays
Fields of Research : 06 Biological Sciences > 0607 Plant Biology > 060704 Plant Pathology
07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070308 Crop and Pasture Protection (Pests, Diseases and Weeds)
10 Technology > 1001 Agricultural Biotechnology > 100101 Agricultural Biotechnology Diagnostics (incl. Biosensors)
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970106 Expanding Knowledge in the Biological Sciences
Identification Number or DOI: 10.1007/s13313-011-0097-z
URI: http://eprints.usq.edu.au/id/eprint/25162

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