Two separate experiments were carried out to assess the plum susceptibility to infection by European stone fruit yellows phytoplasmas during a five year period. Commercial varieties /cultivars and new selections grafted on Myrabolan 29C were evaluated in at least two plots of four plants each. Visual inspection and PCR/RFLP identification of phytoplasmas detected an increasing phytoplasma presence in both symptomatic and asymptomatic plants. Eight Japanese plum selections showed ESFY symptoms or pathogen presence in the 50% of the plants and nine selections showed ESFY infection in the 20% of the plants. Only nine selections showed absence of both symptoms and pathogen. Although the European selections/cultivars were not symptomatic, plants belonging to six of these cultivars were positive to phytoplasma presence. The evaluation of cultivar/rootstock combinations indicate phytoplasma presence from the first year after plantation. Two of the rootstocks seems to induce a delay in symptoms appearance and cultivar T.C. Sun resulted the most susceptible to the disease independently from the rootstock employed

Assessment of susceptibility to European stone fruit yellows phytoplasma of new plum variety and of five rootstock/plum variety combinations.

PALTRINIERI, SAMANTA;BERTACCINI, ASSUNTA
2010

Abstract

Two separate experiments were carried out to assess the plum susceptibility to infection by European stone fruit yellows phytoplasmas during a five year period. Commercial varieties /cultivars and new selections grafted on Myrabolan 29C were evaluated in at least two plots of four plants each. Visual inspection and PCR/RFLP identification of phytoplasmas detected an increasing phytoplasma presence in both symptomatic and asymptomatic plants. Eight Japanese plum selections showed ESFY symptoms or pathogen presence in the 50% of the plants and nine selections showed ESFY infection in the 20% of the plants. Only nine selections showed absence of both symptoms and pathogen. Although the European selections/cultivars were not symptomatic, plants belonging to six of these cultivars were positive to phytoplasma presence. The evaluation of cultivar/rootstock combinations indicate phytoplasma presence from the first year after plantation. Two of the rootstocks seems to induce a delay in symptoms appearance and cultivar T.C. Sun resulted the most susceptible to the disease independently from the rootstock employed
Julius-Kühn-Archiv
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382
Landi F.; A. Prandini; S. Paltrinieri; D. Missere; A. Bertaccini.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/98407
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