Abstract
“Flavescence dorée” (FD) is a quarantine disease of great concern to the stability and sustainability of the wine industry, due to drastic harvest losses and death of infected plants. Previous studies have suggested that salicylic acid (SA) may improve the plant resistance against grapevine diseases, but no studies have been carried out for FD. The effect of 25 mM SA applied at the flowering stage to healthy and FD infected grapevines cultivar Loureiro was evaluated in a field trial. The evaluation of development and productivity (percentage of budburst, fertility index, time to veraison, and chlorophyll content) and grape quality parameters (degree Brix and titrable acidity) was carried out. Fertility index and chlorophyll content were significantly lower in infected plants and SA partly reduced the FD symptoms, since at veraison these plants did not show significant differences when compared to healthy plants for those parameters. However the productivity was significantly lower in the infected plants, with no significant effect of SA application. The berry quality was no significantly different comparing healthy and infected plants or SA-treated and untreated plants.
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Claims 6
Claim · model-written summary
Fertility index and chlorophyll content were significantly lower in FD-infected grapevines than in healthy plants.
- Material
- Loureiroe0
- Outcome
- Fertility index and chlorophyll contente1
- Direction
- lowere1
- Qualifier
- infected plantse1
VitisNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of 25 mM SA applied at the flowering stage to healthy and FD infected grapevines cultivar Loureiro”
e1“Fertility index and chlorophyll content were significantly lower in infected plants”
Claim · model-written summary
Salicylic acid (25 mM at flowering) partly reduced FD symptoms in grapevines compared with untreated plants.
- Material
- Loureiroe0
- Treatment
- 25 mM SA applied at the flowering stagee0
- Outcome
- FD symptomse1
- Direction
- reducede1
- Qualifier
- partlye1
- Comparator
- untreated plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of 25 mM SA applied at the flowering stage to healthy and FD infected grapevines cultivar Loureiro”
e1“SA partly reduced the FD symptoms”
e2“SA-treated and untreated plants”
Claim · model-written summary
Productivity was significantly lower in FD-infected grapevines.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of 25 mM SA applied at the flowering stage to healthy and FD infected grapevines cultivar Loureiro”
e1“the productivity was significantly lower in the infected plants”
Claim · model-written summary
Salicylic acid application had no significant effect on productivity of infected grapevines compared with untreated plants.
- Treatment
- SA applicatione1
- Outcome
- productivitye1
- Direction
- no significant effecte1
- Comparator
- untreated plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of 25 mM SA applied at the flowering stage to healthy and FD infected grapevines cultivar Loureiro”
e1“the productivity was significantly lower in the infected plants, with no significant effect of SA application”
e2“SA-treated and untreated plants”
Claim · model-written summary
Berry quality (degree Brix and titrable acidity) was not significantly different between healthy and infected grapevines.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of 25 mM SA applied at the flowering stage to healthy and FD infected grapevines cultivar Loureiro”
e1“The berry quality was no significantly different comparing healthy and infected plants or SA-treated and untreated plants”
Claim · model-written summary
Berry quality was not significantly different between SA-treated and untreated grapevines.
- Treatment
- SA-treatede1
- Outcome
- berry qualitye1
- Direction
- no significantly differente1
- Comparator
- untreated plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of 25 mM SA applied at the flowering stage to healthy and FD infected grapevines cultivar Loureiro”
e1“The berry quality was no significantly different comparing healthy and infected plants or SA-treated and untreated plants”
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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.