Abstract
Apple necrotic mosaic virus (ApNMV) is the main pathogenic factor of apple mosaic disease in China. Liaoning Province is a major apple-producing area in Bohai Bay, Northeast China. In this study, we investigated ApNMV occurrence in 188 apple plants obtained from Liaoning and analyzed its distribution in different tissues and sequence diversity from 2019 to 2023. ApNMV was detected in 83 samples, among which 32 samples showed mosaic symptoms over 5 years; only five apple trees showed symptoms annually. All ApNMV-positive samples were grouped by the annual onset of symptoms: symptoms annually, asymptomatic annually, and interannual symptom instability. Viral diversity and variant composition did not differ significantly among the three types. The mosaic symptom onset period lasted from late April to mid-July. Regarding dynamic symptom development, lesion scope and size increased slightly from April to May but did not change significantly after May. Titer testing was used to detect ApNMV distribution in different sample tissues, and periods of apple trees that did and did not exhibit mosaic symptoms were quantified. The results showed that ApNMV titer distribution among different parts of the flowers, leaves, and 1-year-old shoots of the two phenotypes did not differ significantly. A high ApNMV titer was observed in the upper leaf and lower shoot of 1-year-old shoots, petals, and petioles. The highest ApNMV titers in apple plants with and without mosaic symptoms were observed in July and August, respectively. Our results have important implications for mosaic disease management in apples.
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Claims 7
Claim · model-written summary
ApNMV was detected in 83 apple samples.
- Taxon
- Apples
Malus domesticat0 - Interactor
- ApNMVe0pathogen
- Outcome
- ApNMV was detectede0
- Value
- 83 samplese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ApNMV was detected in 83 samples”
t0“Apples from Liaoning Province, China”
Claim · model-written summary
Thirty two positive samples showed mosaic symptoms over five years.
- Taxon
- ApplesMalus domesticat0
- Outcome
- mosaic symptomse0
- Value
- 32 samplese0
- Qualifier
- over 5 yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“among which 32 samples showed mosaic symptoms over 5 years”
t0“Apples from Liaoning Province, China”
Claim · model-written summary
Only five apple trees showed symptoms annually.
- Taxon
- apple treesMalus domesticae0
- Outcome
- symptoms annuallye0
- Value
- five apple treese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only five apple trees showed symptoms annually”
Claim · model-written summary
Viral diversity and variant composition did not differ significantly among symptom types.
- Taxon
- ApplesMalus domesticat0
- Outcome
- Viral diversity and variant compositione0
- Direction
- did not differe0
- Comparator
- three typese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Viral diversity and variant composition did not differ significantly among the three types.”
t0“Apples from Liaoning Province, China”
Claim · model-written summary
Mosaic symptom onset lasted from late April to mid-July.
- Taxon
- ApplesMalus domesticat0
- Outcome
- mosaic symptom onset periode0
- Value
- late April to mid-Julye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mosaic symptom onset period lasted from late April to mid-July.”
t0“Apples from Liaoning Province, China”
Claim · model-written summary
Lesion scope and size increased from April to May.
- Taxon
- ApplesMalus domesticat0
- Outcome
- lesion scope and sizee0
- Direction
- increasede0
- Qualifier
- from April to Maye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lesion scope and size increased slightly from April to May but did not change significantly after May”
t0“Apples from Liaoning Province, China”
Claim · model-written summary
Lesion scope and size did not change after May.
- Taxon
- ApplesMalus domesticat0
- Outcome
- lesion scope and sizee0
- Direction
- did not changee0
- Qualifier
- after Maye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lesion scope and size increased slightly from April to May but did not change significantly after May”
t0“Apples from Liaoning Province, China”