Mixed Infection of Grapevines in Northern Italy by Phytoplasmas Including 16S rRNA RFLP Subgroup 16SrI-B Strains Previously Unreported in This Host

Alma, A.; Davis, R. E.; Vibio, M.; Danielli, Alberto; Bosco, Domenico; Arzone, A.; Bertaccini, Assunta

doi:10.1094/pd-80-0418

Cited by 56 publications

(20 citation statements)

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“…In this case the disease management is very difficult since both phytoplasma and insect vectors are non-host specific, however, the usefulness of tuf gene polymorphism for rapid and cheap phytoplasma detection in epidemiological studies of BN was clearly shown [47] [48]. GY diseases occur in other areas of the world where affected plants exhibit syndromes that are seemingly indistinguishable from those of FD or BN but are associated with different phytoplasmas such as aster yellows (16SrI-B) in Italy and South Africa [49] [50], ash yellows (16SrVII-A) in Chile [51], and Australian grapevine yellows in Australia (16SrXII-B) [52] therefore specific local studies are necessary to devise the best management after identification of the insect vector.…”

Section: Grapevine Yellows (Gy)mentioning

confidence: 99%

Phytoplasmas and Phytoplasma Diseases: A Severe Threat to Agriculture

Bertaccini¹,

Duduk²,

Paltrinieri³

et al. 2014

AJPS

307

216

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Section: Grapevine Yellows (Gy)mentioning

confidence: 99%

Phytoplasmas and Phytoplasma Diseases: A Severe Threat to Agriculture

Bertaccini¹,

Duduk²,

Paltrinieri³

et al. 2014

AJPS

307

216

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“…However, it has become clear that different phytoplasmas can cause apparently identical symptoms in certain plants, including phytoplasmas associated with grapevine yellows, bigbud of tomato, and disorders of periwinkle (Catharanthus roseus) (2,6,8,11,22,38,42). Such observations and the occurrence of natural infections by mixed phytoplasma populations (2,3,15,24) can hamper disease diagnosis and complicate attribution of a disease to a single phytoplasma taxon. For example, the syndromes induced by aggressive and nonaggressive strains of ash yellows phytoplasmas in experimentally infected green ash (Fraxinus pennsylvanica) differ dramatically (W. A.…”

mentioning

confidence: 99%

Phytoplasma Identity and Disease Etiology

Davis¹,

Sinclair²

1998

Phytopathology®

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Many plant diseases believed to be caused by phytoplasmas were described before phytoplasma groups were delineated through molecular analyses. It is now possible to assess the relationships between phytoplasma identity or classification and specific plant diseases. Data were consistent with the hypothesis of a common ancestral origin of pathogenicity genes in many phytoplasmas and a limited repertoire of plant responses to certain pathogen signals. Observations also were consistent with the hypotheses that the botanical host ranges of some phytoplasmas reflect specificities in transmission by vectors and vector feeding preferences; phytoplasma-insect vector relationships are keys to understanding evolutionary divergence of phytoplasma lineages; small differences in a highly conserved phytoplasma gene may be regarded as potential indicators of separate gene pools; the reliability of a diagnosis based on symptoms must be learned empirically (i.e., through case study for each syndrome); and some discrete diseases can be ascribed to phytoplasma taxa at the 16S rRNA group level, whereas others are clearly associated with phytoplasma taxa below this level.

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“…Further evidence has emerged which indicates that members of other phytoplasma groups and subgroups also infect grapevines and may induce yellows symptoms in grapevifies (2,13,38). Although some studies provide few data that indicate the identities of diverse phytoplasmas in grapevine yellows disease (9, lo), together with other work (1,4,13,38,40) these studies support the concept that the grapevine yellows diseases are a group of diseases that, although similar in symptomatology, are caused by different phytoplasmas.…”

mentioning

confidence: 99%

"Candidatus Phytoplasma australiense," a New Phytoplasma Taxon Associated with Australian Grapevine Yellows

Davis

Dally²,

Gundersen³

et al. 1997

International Journal of Systematic Bacteriology

133

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A phytoplasma was detected in naturally diseased 'Chardonnay' grapevines exhibiting symptoms of Australian grapevine yellows disease. The use of PCR designed to amplify phytoplasma DNA resulted in detection of phytoplasma DNA in all of the diseased plants examined; no phytoplasma DNA was detected in healthy seedling grapevines. The collective restriction fragment length polymorphism (RFLP) patterns of amplified 16s ribosomal DNA differed from the patterns described previously for other phytoplasmas. On the basis of the RFLP patterns, Australian grapevine yellows phytoplasma was classified as a representative of a new subgroup, designated subgroup 16SrI-J, in phytoplasma 16s rRNA group 16SrI (aster yellows and related phytoplasmas). A phylogenetic analysis in which parsimony of 16s rRNA gene sequences from this and other group 16SrI phytoplasmas was used identified the Australian grapevine yellows phytoplasma as a member of a distinct subclade (subclade xii) in the phytoplasma clade of the class Mollicutes. A phylogenetic tree constructed on the basis of 16s rRNA gene sequences was consistent with the hypothesis that there was divergent evolution of Australian grapevine yellows phytoplasma and its closet known relative, European stolbur phytoplasma (subgroup 16SrI-G), from a common ancestor. The unique properties of the DNA from the Australian grapevine yellows phytoplasma clearly establish that it represents a new taxon, "Candidatus Phytoplasma australiense."

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Mixed Infection of Grapevines in Northern Italy by Phytoplasmas Including 16S rRNA RFLP Subgroup 16SrI-B Strains Previously Unreported in This Host

Cited by 56 publications

References 0 publications

Phytoplasmas and Phytoplasma Diseases: A Severe Threat to Agriculture

Phytoplasmas and Phytoplasma Diseases: A Severe Threat to Agriculture

Phytoplasma Identity and Disease Etiology

"Candidatus Phytoplasma australiense," a New Phytoplasma Taxon Associated with Australian Grapevine Yellows

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