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|Title:||Infection of Cullen australasicum (syn. Psoralea australasica) with Alfalfa mosaic virus|
|Citation:||Australasian Plant Disease Notes, 2009; 4(1):46-48|
|R. M. Nair, N. Habili and J. W. Randles|
|Abstract:||Severe yellow mosaic and leaf distortion symptoms have been observed on Cullen australasicum (cullen) plants growing in experimental plots at Urrbrae, South Australia. The incidence of the affected plants in a 2-year-old stand was ~80%. Symptom distribution on plants was uneven and symptom intensity appeared to vary between seasons. Alfalfa mosaic virus (AMV) was identified in 6/10 symptomatic and 1/10 asymptomatic field plants by reverse transcription-polymerase chain reaction (RT–PCR). Transmission of mosaic symptoms from cullen to cullen by mechanical inoculation was unsuccessful, but a cullen AMV isolate passaged through herbaceous indicators induced systemic mosaic in 1/4 of inoculated cullen seedlings. No seed transmission of AMV was observed in 50 seedlings raised from symptomatic parents. These results show that cullen is a host of AMV, but further studies are needed to determine whether AMV is the sole cause of the mosaic disease.|
|Rights:||Copyright Australasian Plant Pathology Society 2009|
|Appears in Collections:||Agriculture, Food and Wine publications|
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