Abstract
Flavescence dorée (FD) is a phytoplasma disease transmitted by insects, causing severe damage in vineyards across Europe. Since there is no effective treatment, infected plants must be removed to prevent further spread. There is variation in susceptibility to FD among different grapevine cultivars, and some exhibit symptom remission, known as recovery, although the mechanisms behind this are unclear. Diseased plants accumulate soluble sugars, including sucrose, which influences the concentration of trehalose-6-phosphate (T6P), a signalling molecule affecting plant growth and stress responses. It is hypothesized that sucrose-mediated signalling via T6P could trigger defence mechanisms, reducing FD pathogen load and increasing plant recovery. To test this hypothesis, two grapevine genotypes with different susceptibility to FD were compared, revealing increased sucrose level and trehalose-6-phosphate synthase (TPS) activity in the more tolerant cultivar. However, FD-infected plants showed inhibited sucrose-cleaving enzymes and no activation of TPS expression. Attempts to enhance sucrose levels through trunk infusion and girdling promoted sucrose metabolism, T6P biosynthesis, and defence gene expression, facilitating symptom recovery. Girdling particularly enhanced T6P biosynthesis and expression of defence genes above the treatment point, reducing FD pathogen presence and promoting recovery. These findings indicate that elevated sucrose levels, possibly signalling through T6P, may limit FD pathogen spread, aiding in plant recovery.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 8
Claim · model-written summary
The more tolerant grapevine cultivar had increased sucrose level and trehalose-6-phosphate synthase activity.
- Material
- more tolerant cultivare1
- Interactor
- phytoplasma
Candidatus Phytoplasmae0pathogen - Gene
- trehalose-6-phosphate synthasee1
- Outcome
- sucrose level and trehalose-6-phosphate synthase (TPS) activitye1
- Direction
- increasede1
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flavescence dorée (FD) is a phytoplasma disease transmitted by insects, causing severe damage in vineyards across Europe”
e1“two grapevine genotypes with different susceptibility to FD were compared, revealing increased sucrose level and trehalose-6-phosphate synthase (TPS) activity in the more tolerant cultivar”
t0“phytoplasma load in grapevine leaves”
Claim · model-written summary
FD-infected grapevine plants had inhibited sucrose-cleaving enzymes.
- Interactor
- phytoplasmaCandidatus Phytoplasmae0pathogen
- Outcome
- sucrose-cleaving enzymese2
- Direction
- inhibitede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flavescence dorée (FD) is a phytoplasma disease transmitted by insects, causing severe damage in vineyards across Europe”
e2“However, FD-infected plants showed inhibited sucrose-cleaving enzymes and no activation of TPS expression”
t0“phytoplasma load in grapevine leaves”
Claim · model-written summary
FD-infected grapevine plants showed no activation of TPS expression.
- Interactor
- phytoplasmaCandidatus Phytoplasmae0pathogen
- Outcome
- TPS expressione2
- Direction
- no activatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flavescence dorée (FD) is a phytoplasma disease transmitted by insects, causing severe damage in vineyards across Europe”
e2“However, FD-infected plants showed inhibited sucrose-cleaving enzymes and no activation of TPS expression”
t0“phytoplasma load in grapevine leaves”
Claim · model-written summary
Trunk infusion and girdling promoted sucrose metabolism, T6P biosynthesis and defence gene expression in grapevine.
- Treatment
- trunk infusion and girdlinge4
- Outcome
- sucrose metabolism, T6P biosynthesis, and defence gene expressione4
- Direction
- promotede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Attempts to enhance sucrose levels through trunk infusion and girdling promoted sucrose metabolism, T6P biosynthesis, and defence gene expression, facilitating symptom recovery”
t0“phytoplasma load in grapevine leaves”
Claim · model-written summary
Trunk infusion and girdling facilitated symptom recovery in grapevine.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Attempts to enhance sucrose levels through trunk infusion and girdling promoted sucrose metabolism, T6P biosynthesis, and defence gene expression, facilitating symptom recovery”
t0“phytoplasma load in grapevine leaves”
Claim · model-written summary
Girdling enhanced T6P biosynthesis and expression of defence genes above the treatment point.
- Treatment
- Girdlinge3
- Outcome
- T6P biosynthesis and expression of defence genese3
- Direction
- enhancede3
- Qualifier
- above the treatment pointe3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Girdling particularly enhanced T6P biosynthesis and expression of defence genes above the treatment point, reducing FD pathogen presence and promoting recovery”
t0“phytoplasma load in grapevine leaves”
Claim · model-written summary
Girdling reduced FD pathogen presence in grapevine.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Girdling particularly enhanced T6P biosynthesis and expression of defence genes above the treatment point, reducing FD pathogen presence and promoting recovery”
t0“phytoplasma load in grapevine leaves”
Claim · model-written summary
Elevated sucrose levels, possibly signalling through T6P, may limit FD pathogen spread and aid plant recovery.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“These findings indicate that elevated sucrose levels, possibly signalling through T6P, may limit FD pathogen spread, aiding in plant recovery”
t0“phytoplasma load in grapevine leaves”
The same questions in other papers
pruning · disease · VitisPositive and negative results
20 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- negative
- no effect
21 papers more in this group
See all 25 papers →pruning · molecular: expression · VitisResults agree
2 papers in the same direction as this paper
- positive
- positive
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.