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Rickettsia-like-organisms and phytoplasmas associated with diseases in Australian strawberries

Streten, C. and Waite, G.K. and Herrington, M.E. and Hutton, D.G. and Persley, D.M. and Gibb, K.S. (2005) Rickettsia-like-organisms and phytoplasmas associated with diseases in Australian strawberries. Australasian Plant Pathology, 34 (2). pp. 157-164.

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Article Link(s): http://dx.doi.org/10.1071/AP05007

Publisher URL: http://www.publish.csiro.au/

Abstract

Strawberry lethal yellows (SLY) disease in Australia is associated with the phytoplasmas Candidatus Phytoplasma australiense and tomato big bud, and a rickettsia-like-organism (RLO). Ca. P. australiense is also associated with strawberry green petal (SGP) disease. This study investigated the strength of the association of the different agents with SLY disease. We also documented the location of SLY or SGP plants, and measured whether they were RLO or phytoplasma positive. Symptomatic strawberry plants collected from south-east Queensland (Australia) between January 2000 and October 2002 were screened by PCR for both phytoplasmas and the RLO. Two previously unreported disease symptoms termed severe fruit distortion (SFD) and strawberry leaves from fruit (SLF) were observed during this study but there was no clear association between these symptoms and phytoplasmas or the RLO. Only two SGP diseased plants were observed and collected, compared with 363 plants with SLY disease symptoms. Of the 363 SLY samples, 117 tested positive for the RLO, 67 tested positive for Ca. P. australiense AGY strain and 11 plants tested positive for Ca. P. australiense PYL variant strain. On runner production farms at Stanthorpe, Queensland the RLO was detected in SLY diseased plants more frequently than for the phytoplasmas. On fruit production farms on the Sunshine Coast, Queensland, Ca. P. australiense was detected in SLY disease plants more frequently than the RLO.

Item Type:Article
Corporate Creators:Department of Employment, Economic Development and Innovation (DEEDI), Agri-Science, Crop and Food Science, Horticulture and Forestry Science
Business groups:Agri-Science, Crop and Food Science, Horticulture and Forestry Science
Additional Information:© Australasian Plant Pathology Society. Reproduced with permission from © CSIRO Publishing. Access to published version may be available via Publisher’s website.
Keywords:Candidatus Phytoplasma australiense; strawberry green petal; strawberry lethal yellows; Fragaria x ananassa; phytoplasma; rickettsia; strawberry green petal phytoplasma; strawberry lethal yellows phytoplasma.
Subjects:Plant culture > Fruit and fruit culture > Berries and small fruits
Plant pests and diseases > Individual or types of plants or trees
Deposited On:05 Mar 2009 05:27
Last Modified:26 Oct 2011 04:19

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