Abstract
Abstract Yellows diseases associated with phytoplasmas cause high mortality in China‐tree ( Melia azedarach ) in Argentina, but there has been no previous large‐scale survey to determine their diversity and geographical distribution. To assess the presence and identity of phytoplasmas affecting this species throughout the country, 425 samples of symptomatic trees collected at different geographic locations were analysed by a polymerase chain reaction (using universal and group‐specific primers) and restriction fragment length polymorphism. Phytoplasmas belonging to 16SrIII‐B group were detected at almost every location sampled, whereas 16SrXIII‐C group phytoplasmas, reported for the first time in Argentina, were only found in two regions sharing similar agro‐ecological characteristics (Northeast provinces and Tucumán). Double infections with 16SrIII‐B and 16SrXIII‐C group phytoplasmas were also recorded. Nucleotide sequencing of the 16S rDNA of three Argentinian 16SrXIII‐C group phytoplasma isolates revealed high identity (99.6–99.3%) with the CbY1 isolate reported from Bolivia.
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Claims 4
Claim · model-written summary
16SrIII-B phytoplasmas were detected at almost every sampled location.
- Interactor
- Phytoplasmas
Candidatus Phytoplasmae0pathogen - Outcome
- 16SrIII‐B group were detected at almost every location samplede0
ChinaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phytoplasmas belonging to 16SrIII‐B group were detected at almost every location sampled”
t0“China‐tree”
Claim · model-written summary
16SrXIII-C phytoplasmas were first reported in Argentina and found only in two regions.
- Interactor
- 16SrXIII‐C group phytoplasmase0pathogen
- Outcome
- 16SrXIII‐C group phytoplasmase0
- Value
- two regionse0
- Setting
- Argentinae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“16SrXIII‐C group phytoplasmas, reported for the first time in Argentina, were only found in two regions sharing similar agro‐ecological characteristics (Northeast provinces and Tucumán)”
t0“China‐tree”
Claim · model-written summary
Double infections by both phytoplasma groups were recorded.
- Interactor
- 16SrIII‐Be0pathogen
- Second interactor
- 16SrXIII‐C group phytoplasmase0pathogen
- Outcome
- Double infectionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Double infections with 16SrIII‐B and 16SrXIII‐C group phytoplasmas were also recorded”
t0“China‐tree”
Claim · model-written summary
Three Argentine 16SrXIII-C isolates had 99.6–99.3% 16S rDNA identity to Bolivian CbY1.
- Interactor
- 16SrXIII‐C group phytoplasmae0pathogen
- Outcome
- high identitye0
- Value
- 99.6–99.3%e0
- Comparator
- CbY1 isolatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nucleotide sequencing of the 16S rDNA of three Argentinian 16SrXIII‐C group phytoplasma isolates revealed high identity (99.6–99.3%) with the CbY1 isolate reported from Bolivia”
t0“China‐tree”