Abstract
Mycoplasma‐like organisms (MLOs) were detected by fluorescence microscopy in a number of pear cultivars and pear seedlings growing under a range of different conditions. In the cultivar Conference, MLOs were consistently associated with symptoms of Parry's disease, a decline‐like disease of young trees with quince rootstocks. MLO‐free pear seedlings rapidly became infected when they were planted outside. Experimental transmission of MLOs to pear seedlings and Conference trees was achieved using pear psyllids, caught outside or raised on infected plants under controlled conditions. Conference trees in an orchard trial remained free from the severe spring symptoms of Parry's disease when they were protected from feeding insects during spring of the previous year. MLOs were graft transmissible, but were not perpetuated by the standard propagation practices of budding or grafting when quince rootstocks were used. Parry's disease appears to be similar to pear decline, an MLO‐induced disease well established in several other parts of the world. It is suggested that Parry's disease should be referred to as pear decline.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
MLOs were detected in pear cultivars and seedlings.
- Taxon
- pear
_Poirier_Fleurs_et_feuilles.jpg?width=60)
Pyrus communise0 - Interactor
- Mycoplasma‐like organismse0pathogen
- Outcome
- were detectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Poirier_Fleurs_et_feuilles.jpg?width=500)
Verbatim
e0“Mycoplasma‐like organisms (MLOs) were detected by fluorescence microscopy in a number of pear cultivars and pear seedlings”
Claim · model-written summary
MLOs were consistently associated with Parry’s disease symptoms in Conference.
- Material
- Conferencee0
- Interactor
- MLOs
Candidatus Phytoplasmae0pathogen - Outcome
- symptoms of Parry's diseasee0
Not reportedTaxonDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the cultivar Conference, MLOs were consistently associated with symptoms of Parry's disease”
Claim · model-written summary
MLO-free pear seedlings rapidly became infected outdoors.
- Taxon
- pearPyrus communise0
- Outcome
- became infectede0
- Setting
- outsidee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MLO‐free pear seedlings rapidly became infected when they were planted outside”
Claim · model-written summary
Pear psyllids experimentally transmitted MLOs to pear seedlings and Conference trees.
- Taxon
- pearPyrus communise0
- Treatment
- using pear psyllidse0
- Interactor
- MLOsCandidatus Phytoplasmae0pathogen
- Second interactor
- pear psyllidse0pest
- Outcome
- transmission of MLOse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experimental transmission of MLOs to pear seedlings and Conference trees was achieved using pear psyllids”
Claim · model-written summary
Protecting Conference trees from spring feeding insects prevented severe spring symptoms.
- Material
- Conferencee0
- Treatment
- protected from feeding insects during spring of the previous yeare0
- Interactor
- feeding insectse0pest
- Outcome
- remained free from the severe spring symptoms of Parry's diseasee0
Not reportedTaxonComparatorDirection
Verbatim
e0“Conference trees in an orchard trial remained free from the severe spring symptoms of Parry's disease when they were protected from feeding insects during spring of the previous year”
Claim · model-written summary
MLOs were graft transmissible.
- Interactor
- MLOsCandidatus Phytoplasmae0pathogen
- Outcome
- graft transmissiblee0
Not reportedTaxon
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MLOs were graft transmissible”
Claim · model-written summary
MLOs were not perpetuated by standard budding or grafting with quince rootstocks.
Not reportedTaxon
Verbatim
e0“were not perpetuated by the standard propagation practices of budding or grafting when quince rootstocks were used”
Claim · model-written summary
Parry’s disease appears similar to pear decline.
- Outcome
- similar to pear declinee0
Not reportedTaxon
Verbatim
e0“Parry's disease appears to be similar to pear decline”
Claim · model-written summary
The authors suggest referring to Parry’s disease as pear decline.
- Outcome
- Parry's disease should be referred to as pear declinee0
Not reportedTaxon
Verbatim
e0“It is suggested that Parry's disease should be referred to as pear decline”
The same questions in other papers
infection · disease · Pyrus communis (pear)Positive and negative results
1 in the opposite direction
- negative
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.