Abstract
Summary. Grapevine leaf stripe disease (GLSD) is a tracheomycosis caused by Phaeomoniella chlamydospora and Phaeoacremonium minimum. Impacts on yields of grapes were correlated with the incidence and severity of GLSD symptoms on vine canopies. In 2012 and 2013, vines in two vineyards were treated with nine applications of a mixture of leaf fertilizers containing calcium, magnesium and seaweed extracts. At different growth stages, leaves were sampled from treated and control plots of healthy, GLSD-asymptomatic, or GLSD-symptomatic vines and contents were measured of the phytoalexins trans-resveratrol, trans-ε-viniferin, trans-δ-viniferin and trans-pterostilbene. Grape ripening was also monitored from veraison to harvest during both vintages. The treatments caused significant reductions in canopy symptom expression. Increased phytoalexin contents were measured from ‘fruit set’ to ‘berries developing colour’ stages. Trans-resveratrol peak was recorded in asymptomatic diseased vines at the ‘berries pea-sized’ stage, and trans-ε-viniferin and trans-δ-viniferin increased at the ‘berries beginning to touch’ stage, compared to the contents recorded in untreated asymptomatic vines. From ‘berries developing colour’ to harvest, all treated vines had lower amounts of phytoalexins than the control ones. At harvest, treated healthy and symptomatic vines produced berries with similar amounts of total sugars compared to untreated vines. Treated asymptomatic vines produced berries with greater amounts of total sugars compared to the untreated vines These results indicate that increased phytoalexin content recorded from ‘fruit set’ to ‘berries beginning to touch’ in asymptomatic vines treated with the mineral/seaweed mixture may reduce symptoms of GLSD.
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Claims 12
Claim · model-written summary
Grape yield impacts correlated with the incidence of canopy GLSD symptoms.
- Taxon
- grapese0
- Interactor
- Phaeomoniella chlamydosporaPhaeomoniella chlamydosporae2pathogen
- Outcome
- Impacts on yields of grapese0
- Qualifier
- incidence and severity of GLSD symptomse0
Not reportedDirection
Verbatim
e0“Impacts on yields of grapes were correlated with the incidence and severity of GLSD symptoms on vine canopies.”
t0“Grapevine”
t1“Grapevine leaf stripe disease”
e1“vines in two vineyards were treated with nine applications of a mixture of leaf fertilizers containing calcium, magnesium and seaweed extracts. At different growth stages, leaves were sampled from treated and control plots of healthy, GLSD-asymptomatic, or GLSD-symptomatic vines”
e2“Grapevine leaf stripe disease (GLSD) is a tracheomycosis caused by Phaeomoniella chlamydospora and Phaeoacremonium minimum.”
Claim · model-written summary
Grape yield impacts correlated with canopy GLSD symptom severity.
- Taxon
- grapese0
- Organ / stage
- vine canopiese0
- Outcome
- Impacts on yields of grapese0
- Qualifier
- severity of GLSD symptomse0
Not reportedDirection
Verbatim
e0“Impacts on yields of grapes were correlated with the incidence and severity of GLSD symptoms on vine canopies.”
Claim · model-written summary
The mineral–seaweed treatment significantly reduced canopy symptom expression.
- Treatment
- a mixture of leaf fertilizers containing calcium, magnesium and seaweed extractse1
- Outcome
- canopy symptom expressione0
- Direction
- reductionse0
- Comparator
- control plotse1
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatments caused significant reductions in canopy symptom expression.”
t0“Grapevine”
t1“Grapevine leaf stripe disease”
e1“vines in two vineyards were treated with nine applications of a mixture of leaf fertilizers containing calcium, magnesium and seaweed extracts. At different growth stages, leaves were sampled from treated and control plots of healthy, GLSD-asymptomatic, or GLSD-symptomatic vines”
e2“Grapevine leaf stripe disease (GLSD) is a tracheomycosis caused by Phaeomoniella chlamydospora and Phaeoacremonium minimum.”
Claim · model-written summary
Treated vines had increased leaf phytoalexin content from fruit set to berries developing colour.
- Organ / stage
- ‘fruit set’ to ‘berries developing colour’ stagese0
- Treatment
- a mixture of leaf fertilizers containing calcium, magnesium and seaweed extractse1
- Outcome
- phytoalexin contentse0
- Direction
- Increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased phytoalexin contents were measured from ‘fruit set’ to ‘berries developing colour’ stages.”
t0“Grapevine”
t1“Grapevine leaf stripe disease”
e1“vines in two vineyards were treated with nine applications of a mixture of leaf fertilizers containing calcium, magnesium and seaweed extracts. At different growth stages, leaves were sampled from treated and control plots of healthy, GLSD-asymptomatic, or GLSD-symptomatic vines”
e2“Grapevine leaf stripe disease (GLSD) is a tracheomycosis caused by Phaeomoniella chlamydospora and Phaeoacremonium minimum.”
Claim · model-written summary
Trans-resveratrol peaked in asymptomatic diseased vines at berries pea-sized stage.
- Organ / stage
- ‘berries pea-sized’ stagee0
- Outcome
- Trans-resveratrol peake0
- Direction
- peake0
- Qualifier
- asymptomatic diseased vinese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Trans-resveratrol peak was recorded in asymptomatic diseased vines at the ‘berries pea-sized’ stage”
t0“Grapevine”
t1“Grapevine leaf stripe disease”
e1“vines in two vineyards were treated with nine applications of a mixture of leaf fertilizers containing calcium, magnesium and seaweed extracts. At different growth stages, leaves were sampled from treated and control plots of healthy, GLSD-asymptomatic, or GLSD-symptomatic vines”
e2“Grapevine leaf stripe disease (GLSD) is a tracheomycosis caused by Phaeomoniella chlamydospora and Phaeoacremonium minimum.”
Claim · model-written summary
Trans-ε-viniferin increased at berries beginning to touch versus untreated asymptomatic vines.
- Organ / stage
- ‘berries beginning to touch’ stagee0
- Treatment
- a mixture of leaf fertilizers containing calcium, magnesium and seaweed extractse1
- Outcome
- trans-ε-viniferine0
- Direction
- increasede0
- Comparator
- untreated asymptomatic vinese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“trans-ε-viniferin and trans-δ-viniferin increased at the ‘berries beginning to touch’ stage, compared to the contents recorded in untreated asymptomatic vines.”
t0“Grapevine”
t1“Grapevine leaf stripe disease”
e1“vines in two vineyards were treated with nine applications of a mixture of leaf fertilizers containing calcium, magnesium and seaweed extracts. At different growth stages, leaves were sampled from treated and control plots of healthy, GLSD-asymptomatic, or GLSD-symptomatic vines”
e2“Grapevine leaf stripe disease (GLSD) is a tracheomycosis caused by Phaeomoniella chlamydospora and Phaeoacremonium minimum.”
Claim · model-written summary
Trans-δ-viniferin increased at berries beginning to touch versus untreated asymptomatic vines.
- Organ / stage
- ‘berries beginning to touch’ stagee0
- Treatment
- a mixture of leaf fertilizers containing calcium, magnesium and seaweed extractse1
- Outcome
- trans-δ-viniferine0
- Direction
- increasede0
- Comparator
- untreated asymptomatic vinese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“trans-ε-viniferin and trans-δ-viniferin increased at the ‘berries beginning to touch’ stage, compared to the contents recorded in untreated asymptomatic vines.”
t0“Grapevine”
t1“Grapevine leaf stripe disease”
e1“vines in two vineyards were treated with nine applications of a mixture of leaf fertilizers containing calcium, magnesium and seaweed extracts. At different growth stages, leaves were sampled from treated and control plots of healthy, GLSD-asymptomatic, or GLSD-symptomatic vines”
e2“Grapevine leaf stripe disease (GLSD) is a tracheomycosis caused by Phaeomoniella chlamydospora and Phaeoacremonium minimum.”
Claim · model-written summary
From berries developing colour through harvest, treated vines had less phytoalexin than controls.
- Organ / stage
- ‘berries developing colour’ to harveste0
- Treatment
- treated vinese0
- Outcome
- amounts of phytoalexinse0
- Direction
- lowere0
- Comparator
- control onese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From ‘berries developing colour’ to harvest, all treated vines had lower amounts of phytoalexins than the control ones.”
t0“Grapevine”
t1“Grapevine leaf stripe disease”
e1“vines in two vineyards were treated with nine applications of a mixture of leaf fertilizers containing calcium, magnesium and seaweed extracts. At different growth stages, leaves were sampled from treated and control plots of healthy, GLSD-asymptomatic, or GLSD-symptomatic vines”
e2“Grapevine leaf stripe disease (GLSD) is a tracheomycosis caused by Phaeomoniella chlamydospora and Phaeoacremonium minimum.”
Claim · model-written summary
At harvest, treated healthy vines had berry sugar levels similar to untreated vines.
- Treatment
- treated healthye0
- Outcome
- amounts of total sugarse0
- Direction
- similare0
- Qualifier
- At harveste0
- Comparator
- untreated vinese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At harvest, treated healthy and symptomatic vines produced berries with similar amounts of total sugars compared to untreated vines.”
t0“Grapevine”
t1“Grapevine leaf stripe disease”
e1“vines in two vineyards were treated with nine applications of a mixture of leaf fertilizers containing calcium, magnesium and seaweed extracts. At different growth stages, leaves were sampled from treated and control plots of healthy, GLSD-asymptomatic, or GLSD-symptomatic vines”
e2“Grapevine leaf stripe disease (GLSD) is a tracheomycosis caused by Phaeomoniella chlamydospora and Phaeoacremonium minimum.”
Claim · model-written summary
At harvest, treated symptomatic vines had berry sugar levels similar to untreated vines.
- Treatment
- treated healthy and symptomatic vinese0
- Outcome
- amounts of total sugarse0
- Direction
- similare0
- Qualifier
- At harveste0
- Comparator
- untreated vinese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At harvest, treated healthy and symptomatic vines produced berries with similar amounts of total sugars compared to untreated vines.”
t0“Grapevine”
t1“Grapevine leaf stripe disease”
e1“vines in two vineyards were treated with nine applications of a mixture of leaf fertilizers containing calcium, magnesium and seaweed extracts. At different growth stages, leaves were sampled from treated and control plots of healthy, GLSD-asymptomatic, or GLSD-symptomatic vines”
e2“Grapevine leaf stripe disease (GLSD) is a tracheomycosis caused by Phaeomoniella chlamydospora and Phaeoacremonium minimum.”
Claim · model-written summary
Treated asymptomatic vines produced berries with more total sugar than untreated vines.
- Treatment
- Treated asymptomatic vinese0
- Outcome
- amounts of total sugarse0
- Direction
- greatere0
- Comparator
- untreated vinese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treated asymptomatic vines produced berries with greater amounts of total sugars compared to the untreated vines”
t0“Grapevine”
t1“Grapevine leaf stripe disease”
e1“vines in two vineyards were treated with nine applications of a mixture of leaf fertilizers containing calcium, magnesium and seaweed extracts. At different growth stages, leaves were sampled from treated and control plots of healthy, GLSD-asymptomatic, or GLSD-symptomatic vines”
e2“Grapevine leaf stripe disease (GLSD) is a tracheomycosis caused by Phaeomoniella chlamydospora and Phaeoacremonium minimum.”
Claim · model-written summary
The authors suggested increased early phytoalexins in mixture-treated asymptomatic vines may reduce GLSD symptoms.
- Treatment
- mineral/seaweed mixturee0
- Outcome
- symptoms of GLSDe0
- Direction
- reducee0
- Qualifier
- increased phytoalexin contente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased phytoalexin content recorded from ‘fruit set’ to ‘berries beginning to touch’ in asymptomatic vines treated with the mineral/seaweed mixture may reduce symptoms of GLSD.”
t0“Grapevine”
t1“Grapevine leaf stripe disease”
e1“vines in two vineyards were treated with nine applications of a mixture of leaf fertilizers containing calcium, magnesium and seaweed extracts. At different growth stages, leaves were sampled from treated and control plots of healthy, GLSD-asymptomatic, or GLSD-symptomatic vines”
e2“Grapevine leaf stripe disease (GLSD) is a tracheomycosis caused by Phaeomoniella chlamydospora and Phaeoacremonium minimum.”
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