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Plant hosts of the phytoplasmas and rickettsia-like-organisms associated with strawberry lethal yellows and green petal diseases

Streten, C. and Herrington, M.E. and Hutton, D.G. and Persley, D.M. and Waite, G.K. and Gibb, K.S. (2005) Plant hosts of the phytoplasmas and rickettsia-like-organisms associated with strawberry lethal yellows and green petal diseases. Australasian Plant Pathology, 34 (2). pp. 165-173.

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Article Link(s): http://dx.doi.org/10.1071/AP05014

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

Abstract

Candidatus Phytoplasma australiense (Ca. P. australiense) is associated with the plant diseases strawberry lethal yellows (SLY), strawberry green petal (SGP), papaya dieback (PDB), Australian grapevine yellows (AGY) and Phormium yellow leaf (PYL; New Zealand). Strawberry lethal yellows disease is also associated with a rickettsia-like-organism (RLO) or infrequently with the tomato big bud (TBB) phytoplasma, the latter being associated with a wide range of plant diseases throughout Australia. In contrast, the RLO has been identified only in association with SLY disease, and Ca. P. australiense has been detected only in a limited number of plant host species. The aim of this study was to identify plant hosts that are possible reservoirs of Ca. P. australiense and the SLY RLO. Thirty-one plant species from south-east Queensland were observed with disease between 2001 and 2003 and, of these, 18 species tested positive using phytoplasma-specific primers. The RLO was detected in diseased Jacksonia scoparia and Modiola caroliniana samples collected at Stanthorpe. The TBB phytoplasma was detected in 16 different plant species and Ca. P. australiense Australian grapevine yellows strain was detected in six species. The TBB phytoplasma was detected in plants collected at Nambour, Stanthorpe, Warwick and Brisbane. Ca. P. australiense was detected in plants collected at Nambour, Stanthorpe, Gatton and Allora. All four phytoplasmas were detected in diseased Gomphocarpus physocarpus plants collected at Toowoomba, Allora, Nambour and Gatton. These results indicated that the vector(s) of Ca. P. australiense are distributed throughout south-east Queensland and the diversity of phytoplasmas detected in G. physocarpus suggests it is a feeding source for phytoplasma insect vectors or it has a broad susceptibility to a range of phytoplasmas.

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; Carica papaya; Fragaria x ananassa; Gomphocarpus physocarpus; Insecta; Jacksonia scoparia; Lycopersicon esculentum; Modiola caroliniana; Phormium; Phytoplasma; Rickettsia; Scoparia; strawberry lethal yellows phytoplasma; tomato big bud phytoplasma; Vitis.
Subjects:Plant culture > Fruit and fruit culture > Berries and small fruits
Plant pests and diseases > Plant pathology
Deposited On:05 Mar 2009 05:10
Last Modified:26 Oct 2011 04:18

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