First report of phytoplasmas in the aster yellows group infecting grapevine in Tunisia

M'hirsi, Sonia; Acheche, Hajer; Fattouch, Sami; Boccardo, G.; Marrakchi, M.; Marzouki, M. Néjib

doi:10.1111/j.1365-3059.2004.01029.x

Cited by 6 publications

(1 citation statement)

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“…Interestingly, group 16SrI phytoplasmas related to those causing AY disease in herbaceous plants have been reported in diseased V. vinifera in several regions of the world. In addition to North America, grapevine yellows-associated phytoplasmas belonging to subgroup 16SrI-B have been reported in South America, Europe, and Africa (Alma et al 1996;Engelbrecht et al 2010;Ertunc et al 2015;Gajardo et al 2009;M'hirsi et al 2004;Olivier et al 2009Olivier et al , 2014) (this study). The design and implementation of effective strategies to manage these diseases will rest, in part, upon knowledge of non-V. vinifera plant hosts and insect vectors of these phytoplasmas.…”

Section: Discussionmentioning

confidence: 51%

Genotyping Points to Divergent Evolution of ‘CandidatusPhytoplasma asteris’ Strains Causing North American Grapevine Yellows and Strains Causing Aster Yellows

et al. 2018

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Grapevine yellows diseases occur in cultivated grapevine (Vitis vinifera L.) on several continents, where the diseases are known by different names depending upon the identities of the causal phytoplasmas. In this study, phytoplasma strains associated with grapevine yellows disease (North American grapevine yellows [NAGY]) in vineyards of Pennsylvania were characterized as belonging to 16S ribosomal RNA (rRNA) gene restriction fragment length polymorphism group 16SrI (aster yellows phytoplasma group), subgroup 16SrI-B (I-B), and variant subgroup I-B*. The strains (NAGYI strains) were subjected to genotyping based on analyses of 16S rRNA and secY genes, and to in silico three-dimensional modeling of the SecY protein. Although the NAGYI strains are closely related to aster yellows (AY) phytoplasma strains and are classified like AY strains in subgroup I-B or in variant subgroup I-B*, the results from genotyping and protein modeling may signal ongoing evolutionary divergence of NAGYI strains from related strains in subgroup 16SrI-B.

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