Abstract
Background and Aims Grapevine downy mildew, the most destructive grapevine disease caused by Plasmopara viticola, requires more environmentally friendly control measures. A chemically inert kaolin particle film (KPF) was tested for the control of downy mildew. Methods and Results Grapevines were pretreated with KPF before P. viticola infection under field conditions, then an epidemic was monitored for 2 years (2020 and 2021). A 6% KPF pretreatment significantly delayed the epidemic onset by 1–2 weeks and decreased the disease index by 30% compared to the untreated vines. The concentration of hydrogen peroxide and malondialdehyde in leaves was reduced by the KPF treatment, indicating mitigation of the oxidative damage caused by P. viticola infection. The protective effect of the application of KPF may be due to the increased activity of antioxidant enzymes and antioxidant metabolites. The activity of disease resistance enzymes and the expression of related genes were also increased by KPF treatment. Conclusions Kaolin particle film reduced grapevine downy mildew and reinforced the defence response of grapevines cultivated in the field. Significance of the Study The positive effect of KPF against downy mildew for grapevines in the field indicated that there is potential to develop KPF for the control of downy mildew.
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 5
Claim · model-written summary
A 6% kaolin particle film pretreatment delayed the downy mildew epidemic onset by 1–2 weeks.
- Treatment
- 6% KPF pretreatmente2
- Interactor
- P. viticola
Plasmopara viticolae1pathogen - Outcome
- epidemic onsete2
- Direction
- delayede2
- Value
- 1–2 weekse2
- Comparator
- untreated vinese3
- Setting
- under field conditionse1
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Grapevines were pretreated with KPF before P. viticola infection under field conditions”
e2“A 6% KPF pretreatment significantly delayed the epidemic onset by 1–2 weeks”
e3“decreased the disease index by 30% compared to the untreated vines”
Claim · model-written summary
A 6% kaolin particle film pretreatment decreased the downy mildew disease index by 30% relative to untreated vines.
- Treatment
- 6% KPF pretreatmente2
- Interactor
- P. viticolaPlasmopara viticolae1pathogen
- Outcome
- disease indexe3
- Direction
- decreasede3
- Value
- 30%e3
- Comparator
- untreated vinese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Grapevines were pretreated with KPF before P. viticola infection under field conditions”
e2“A 6% KPF pretreatment significantly delayed the epidemic onset by 1–2 weeks”
e3“decreased the disease index by 30% compared to the untreated vines”
Claim · model-written summary
KPF treatment reduced hydrogen peroxide and malondialdehyde concentrations in grapevine leaves, mitigating oxidative damage from P. viticola.
- Treatment
- KPF treatmente4
- Interactor
- P. viticolaPlasmopara viticolae5pathogen
- Outcome
- concentration of hydrogen peroxide and malondialdehyde in leavese4
- Direction
- reducede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine downy mildew”
e4“The concentration of hydrogen peroxide and malondialdehyde in leaves was reduced by the KPF treatment”
e5“indicating mitigation of the oxidative damage caused by P. viticola infection”
Claim · model-written summary
The protective effect of KPF may be due to increased antioxidant enzyme activity and antioxidant metabolites.
- Treatment
- application of KPFe6
- Gene
- antioxidant enzymese6
- Compound
- antioxidant metabolitese6
- Outcome
- protective effecte6
- Qualifier
- may be due toe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine downy mildew”
e6“The protective effect of the application of KPF may be due to the increased activity of antioxidant enzymes and antioxidant metabolites”
Claim · model-written summary
KPF treatment increased disease resistance enzyme activity and expression of related genes in grapevine.
- Treatment
- KPF treatmente7
- Outcome
- activity of disease resistance enzymes and the expression of related genese7
- Direction
- increasede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine downy mildew”
e7“The activity of disease resistance enzymes and the expression of related genes were also increased by KPF treatment”
The same questions in other papers
kaolin · molecular: expression · VitisResults agree
3 papers in the same direction as this paper
- positive
- 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.