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Virus Res

Title:		Establishing alighting preferences and species transmission differences for Pea seed-borne mosaic virus aphid vectors
Author(s):		Congdon BS; Coutts BA; Renton M; Flematti GR; Jones RAC;
Address:		"School of Agriculture and Environment, Faculty of Science, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia; Institute of Agriculture, Faculty of Science, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia. Electronic address: benjamin.congdon@research.uwa.edu.au. Crop Protection Branch, Department of Agriculture and Food Western Australia, Locked Bag No. 4, Bentley Delivery Centre, Perth, WA 6983, Australia. Electronic address: brenda.coutts@agric.wa.gov.au. School of Agriculture and Environment, Faculty of Science, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia; Institute of Agriculture, Faculty of Science, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia. Electronic address: michael.renton@uwa.edu.au. School of Chemistry and Biochemistry, Faculty of Science, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia. Electronic address: gavin.flematti@uwa.edu.au. Institute of Agriculture, Faculty of Science, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia; Crop Protection Branch, Department of Agriculture and Food Western Australia, Locked Bag No. 4, Bentley Delivery Centre, Perth, WA 6983, Australia. Electronic address: roger.jones@uwa.edu.au"
Journal Title:		Virus Res
Year:		2017
Volume:		20170411
Issue:
Page Number:		145 - 155
DOI:		10.1016/j.virusres.2017.04.005
ISSN/ISBN:		1872-7492 (Electronic) 0168-1702 (Linking)
Abstract:		"Pea seed-borne mosaic virus (PSbMV) infection causes a serious disease of field pea (Pisum sativum) crops worldwide. The PSbMV transmission efficiencies of five aphid species previously found landing in south-west Australian pea crops in which PSbMV was spreading were studied. With plants of susceptible pea cv. Kaspa, the transmission efficiencies of Aphis craccivora, Myzus persicae, Acyrthosiphon kondoi and Rhopalosiphum padi were 27%, 26%, 6% and 3%, respectively. Lipaphis erysimi did not transmit PSbMV in these experiments. The transmission efficiencies found for M. persicae and A. craccivora resembled earlier findings, but PSbMV vector transmission efficiency data were unavailable for A. kondoi, R. padi and L. erysimi. With plants of partially PSbMV resistant pea cv. PBA Twilight, transmission efficiencies of M. persicae, A. craccivora and R. padi were 16%, 12% and 1%, respectively, reflecting putative partial resistance to aphid inoculation. To examine aphid alighting preferences over time, free-choice assays were conducted with two aphid species representing efficient (M. persicae) and inefficient (R. padi) vector species. For this, alatae were set free on multiple occasions (10-15 repetitions each) amongst PSbMV-infected and mock-inoculated pea or faba bean (Vicia faba) plants. Following release, non-viruliferous R. padi alatae exhibited a general preference for PSbMV-infected pea and faba bean plants after 30min-4h, but preferred mock-inoculated plants after 24h. In contrast, non-viruliferous M. persicae alatae alighted on mock-inoculated pea plants preferentially for up to 48h following their release. With faba bean, M. persicae preferred infected plants at the front of assay cages, but mock-inoculated ones their backs, apparently due to increased levels of natural light there. When preliminary analyses were performed to detect PSbMV-induced changes in the volatile organic compound profiles of pea and faba bean plants, higher numbers of volatiles representing a range of compound groups (such as aldehydes, ketones and esters) were found in the headspaces of PSbMV-infected than of mock-inoculated pea or faba bean plants. This indicates PSbMV induces physiological changes in these hosts which manifest as altered volatile emissions. These alterations could be responsible for the differences in alighting preferences. Information from this study enhances understanding of virus-vector relationships in the PSbMV-pea and faba bean pathosystems"
Keywords:		Animals Aphids/*virology Australia Insect Vectors/*virology Peas/*virology Plant Diseases/*virology Potyvirus/*physiology Volatile Organic Compounds/metabolism Alighting preference Aphid Manipulation Non-persistent PSbMV Transmission efficiency Volatiles;
Notes:		"MedlineCongdon, B S Coutts, B A Renton, M Flematti, G R Jones, R A C eng Netherlands 2017/04/15 Virus Res. 2017 Sep 15; 241:145-155. doi: 10.1016/j.virusres.2017.04.005. Epub 2017 Apr 11"