Abstract
Foliar treatments with mineral-based compounds have aroused interest as a sustainable approach to cope with high-temperature stress in vineyards, improving the colour of grapes and wines without altering the sugar concentration. Since berry-associated microorganisms are crucial for wine production, composition and stability, the present study aims to unravel the effects of kaolin and zeolite treatments on berry quality, flavonoid gene expression and epiphytic microorganisms (total fungi, Hanseniospora uvarum, Metschnikowia pulcherrima, plant-associated bacteria and lactic acid bacteria). Experiments were performed on 'Sangiovese' during ripening in two growing seasons (2019 and 2020). Both mineral treatments were able to cause the elicitation of several flavonoid-related genes and to increase the anthocyanin concentration in berries without an alteration of the final technological maturity (TSS, TA, pH) of the grapes. Interestingly, neither kaolin nor zeolites negatively affected the analysed microbial population at harvest despite transient alterations observed in the more stressful year (2019). These results support the use of foliar mineral treatments to increase anthocyanin concentration in grape berries and protect them from excessive heat without altering their native microorganisms.
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Claims 6
Claim · model-written summary
Kaolin and zeolite treatments elicited several flavonoid-related genes in grapevine berries.
- Material
- Sangiovesee0
- Treatment
- kaolin and zeolitee4
- Gene
- flavonoid-related genese1
- Outcome
- flavonoid-related genese1
- Direction
- increaseinferrede1
VitisNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine epiphytic microorganisms”
e0“Experiments were performed on 'Sangiovese' during ripening in two growing seasons (2019 and 2020)”
e1“cause the elicitation of several flavonoid-related genes”
e4“the effects of kaolin and zeolite treatments”
Claim · model-written summary
Kaolin and zeolite treatments increased anthocyanin concentration in grape berries.
- Material
- Sangiovesee0
- Organ / stage
- berriese2
- Treatment
- kaolin and zeolitee4
- Outcome
- anthocyanin concentratione2
- Direction
- increasee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine epiphytic microorganisms”
e0“Experiments were performed on 'Sangiovese' during ripening in two growing seasons (2019 and 2020)”
e2“increase the anthocyanin concentration in berries”
e4“the effects of kaolin and zeolite treatments”
Claim · model-written summary
Kaolin and zeolite treatments did not alter the technological maturity (TSS, TA, pH) of the grapes.
- Material
- Sangiovesee0
- Organ / stage
- grapese3
- Treatment
- kaolin and zeolitee4
- Outcome
- technological maturity (TSS, TA, pH)e3
- Direction
- no_changeinferrede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine epiphytic microorganisms”
e0“Experiments were performed on 'Sangiovese' during ripening in two growing seasons (2019 and 2020)”
e3“without an alteration of the final technological maturity (TSS, TA, pH) of the grapes”
e4“the effects of kaolin and zeolite treatments”
Claim · model-written summary
Neither kaolin nor zeolite negatively affected the analysed epiphytic microbial population at harvest.
- Treatment
- kaolin and zeolitee4
- Outcome
- analysed microbial populatione5
- Direction
- no_changeinferrede5
- Qualifier
- at harveste5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine epiphytic microorganisms”
e4“the effects of kaolin and zeolite treatments”
e5“neither kaolin nor zeolites negatively affected the analysed microbial population at harvest”
Claim · model-written summary
Transient alterations of the microbial population were observed in 2019, the more stressful year, after kaolin and zeolite treatments.
- Treatment
- kaolin and zeolitee4
- Outcome
- transient alterationse6
- Qualifier
- in the more stressful year (2019)e6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine epiphytic microorganisms”
e4“the effects of kaolin and zeolite treatments”
e6“transient alterations observed in the more stressful year (2019)”
Claim · model-written summary
Foliar mineral treatments are supported for increasing berry anthocyanin and protecting grapes from excessive heat (author recommendation).
- Treatment
- foliar mineral treatmentse7
- Outcome
- use of foliar mineral treatmentse7
- Qualifier
- protect them from excessive heate7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine epiphytic microorganisms”
e7“support the use of foliar mineral treatments to increase anthocyanin concentration in grape berries and protect them from excessive heat”
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2 papers in the same direction as this paper
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other · quality: phytochemicals · VitisResults agree
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See all 7 papers →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.