<i>Candidatus</i>Phytoplasma australiense is associated with pumpkin yellow leaf curl disease in Queensland, Western Australia and the Northern Territory

Streten, Claire; Condé, B. D.; Herrington, M. E.; Moulden, J H; Gibb, Karen S.

doi:10.1071/ap04077

Cited by 20 publications

(11 citation statements)

References 14 publications

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“…Pumpkin plants with yellow leaf curl were observed at Gatton and Ca. P. australiense AGY strain was detected in these samples, thus confirming this previously reported phytoplasma associated disease (Streten et al 2005a).…”

Section: Discussionsupporting

confidence: 78%

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

Streten

Herrington²,

Hutton³

et al. 2005

Austral. Plant Pathol.

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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.

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Section: Discussionsupporting

confidence: 78%

“…More recently, Ca. P. australiense has been implicated as a causal agent of pumpkin yellow leaf curl (PYLC; Streten et al 2005a) and periwinkle phyllody (Davis et al 2003). Ca.…”

Section: Introductionmentioning

confidence: 99%

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

Streten

Herrington²,

Hutton³

et al. 2005

Austral. Plant Pathol.

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“…Phytoplasma australiense" PMUs may have been laterally transferred and accumulated throughout the genome is unknown, since the features that characterize composite transposons, such as inverted repeat regions, were not found. If the PMUs are mobile, they may rely on helper elements to provide conjugative transfer, or they may package the mobile units into phage particles (45,71,81).…”

Section: Discussionmentioning

confidence: 99%

“…Phytoplasma australiense"), a member of the 16SrXII-B group, is widespread and associated with several diseases in economically important crops. These diseases include Australian grapevine yellows (61,75), papaya dieback (41), strawberry lethal yellows (SLY), strawberry green petal (62), and pumpkin yellow leaf curl (81). In New Zealand, "Ca.…”

mentioning

confidence: 99%

Comparative Genome Analysis of “CandidatusPhytoplasma australiense” (Subgrouptuf-Australia I;rp-A) and “Ca. Phytoplasma asteris” Strains OY-M and AY-WB

et al. 2008

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The chromosome sequence of “Candidatus Phytoplasma australiense” (subgroup tuf-Australia I; rp-A), associated with dieback in papaya, Australian grapevine yellows in grapevine, and several other important plant diseases, was determined. The circular chromosome is represented by 879,324 nucleotides, a GC content of 27%, and 839 protein-coding genes. Five hundred two of these protein-coding genes were functionally assigned, while 337 genes were hypothetical proteins with unknown function. Potential mobile units (PMUs) containing clusters of DNA repeats comprised 12.1% of the genome. These PMUs encoded genes involved in DNA replication, repair, and recombination; nucleotide transport and metabolism; translation; and ribosomal structure. Elements with similarities to phage integrases found in these mobile units were difficult to classify, as they were similar to both insertion sequences and bacteriophages. Comparative analysis of “Ca. Phytoplasma australiense” with “Ca. Phytoplasma asteris” strains OY-M and AY-WB showed that the gene order was more conserved between the closely related “Ca. Phytoplasma asteris” strains than to “Ca. Phytoplasma australiense.” Differences observed between “Ca. Phytoplasma australiense” and “Ca. Phytoplasma asteris” strains included the chromosome size (18,693 bp larger than OY-M), a larger number of genes with assigned function, and hypothetical proteins with unknown function.

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“…Inicialmente a doença foi atribuída a vírus, porém, posteriormente, foi reconhecida como sendo associada a um fitoplasma pertencente ao grupo 16SrI (Lee et al, 1993;Zitter et al, 1996). Em diversas áreas da Austrália, foram observados sintomas de amarelos em plantas de abóbora (C. maxima e C. moschata) infectadas por um fitoplasma do grupo 16SrXII (Streten et al, 2005).…”

unclassified

Abobrinha-de-moita: um novo hospedeiro de fitoplasma do grupo 16SrIII

Melo¹,

Bedendo²,

Yuki³

2009

Trop. plant pathol.

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RESUMOEm um plantio comercial localizado no Vale do Ribeira, no estado de São Paulo, foram observadas plantas de abobrinha-de-moita (Cucurbita pepo L.) apresentando superbrotamento de ramos, malformação da parte aérea e folhas disformes e enrugadas. Através de PCR foi demonstrada a presença de fitoplasma associado aos tecidos doentes. Um fitoplasma do grupo 16SrIII foi identificado por PCR e pela análise de RFLP, conduzida com cinco enzimas de restrição. A presente comunicação se constitui no primeiro relato da presença de um fitoplasma do grupo 16SrIII em abobrinha-de-moita no Brasil. Palavras-chaves: Mollicutes, Cucurbitaceae, Cucurbita pepo, RFLP. ABSTRACT Summer squash: a new host of phytoplasm belonging to the 16SrIII groupIn a commercial field located in the Vale do Ribeira, in the State of São Paulo, Brazil, plants of summer squash (Cucurbita pepo L.) exhibiting witches' broom and leaf deformation were observed. PCR assays demonstrated the presence of phytoplasma associated with diseased tissues. A phytoplasma belonging to the 16SrIII group was identified by PCR and RFLP analysis performed with five restriction enzymes. The present note is the first report of the presence of phytoplasma representative of the 16SrIII group in summer squash in Brazil.

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CandidatusPhytoplasma australiense is associated with pumpkin yellow leaf curl disease in Queensland, Western Australia and the Northern Territory

Abstract: Abstract. Pumpkin plants (Cucurbita maxima and C. moschata)

Cited by 20 publications

References 14 publications

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

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

Comparative Genome Analysis of “CandidatusPhytoplasma australiense” (Subgrouptuf-Australia I;rp-A) and “Ca. Phytoplasma asteris” Strains OY-M and AY-WB

Abobrinha-de-moita: um novo hospedeiro de fitoplasma do grupo 16SrIII

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