Abstract
The global warming and the general improvement of vineyard management techniques over the last fifty years appear to have upgraded the quality of wine worldwide. Besides, in some wine regions where heat summations largely exceed technological requirements for the grown varieties, grapes showed at harvest a too high level of sugar and subsequent wine alcohol excess, low acidity, alteration of aroma composition and, in black varieties, unbalanced phenolic ripening with insufficient berry skin colour. The final aim of the research is to test the effects of post veraison trimming or anti-transpirant spray on sugar accumulation rate and berry phenolic compounds evolution during ripening. This trial was conducted in 2009 and 2010 on Sangiovese (V. vinifera L.) vines trained to Free Cordon trellis system. Three treatments were compared: non-trimmed control (C); shoot trimming, 1 week after full veraison (TRIMM ); anti-transpirant Pinolene sprayed at 2% concentration, 1 week after full veraison (PIN). Measurements on leaf gas exchange showed that Pinolene spray reduced photosynthetic activity on laterals leaves compared to control ones since the day of spray and up to three-four weeks later. After shoot trimming, the total leaf area of TRIMM vines was reduced at about 40 % of the control. Yield per vine was unaffected by both treatments while both treatments showed in 2009 an higher effect in reducing sugars accumulation rate during ripening compared to 2010. In particular PIN treatments was less effective in 2010, while TRIMM effect, although little, was maintained also in the second year. Despite the differences in sugar accumulation, acidity, pH and anthocyanins concentration during ripening were not significantly affected by treatments. The results showed a quite interesting perspective about canopy management techniques, since trimming or Pinolene spray, slowed down sugars accumulation, giving rise to an improved synchrony between technological and phenolic ripening. The results demonstrate the potential of the news canopy management techniques to upgrade the enological grape quality in face to the global climate warming.
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Claims 10
Claim · model-written summary
Pinolene spray reduced leaf photosynthetic activity on lateral leaves relative to control vines from the day of spraying up to three to four weeks later.
- Taxon
- V. vinifera
Vitis viniferae0 - Organ / stage
- laterals leavese1
- Treatment
- Pinolene spraye1
- Outcome
- photosynthetic activitye1
- Direction
- reducede1
- Qualifier
- up to three-four weeks latere1
- Comparator
- control onese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This trial was conducted in 2009 and 2010 on Sangiovese (V. vinifera L.) vines trained to Free Cordon trellis system”
e1“Measurements on leaf gas exchange showed that Pinolene spray reduced photosynthetic activity on laterals leaves compared to control ones since the day of spray and up to three-four weeks later”
Claim · model-written summary
After shoot trimming, total leaf area was reduced to about 40% of the control vines.
- Taxon
- V. viniferaVitis viniferae0
- Treatment
- shoot trimminge2
- Outcome
- total leaf areae2
- Direction
- reducede2
- Value
- about 40 %e2
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This trial was conducted in 2009 and 2010 on Sangiovese (V. vinifera L.) vines trained to Free Cordon trellis system”
e2“After shoot trimming, the total leaf area of TRIMM vines was reduced at about 40 % of the control”
Claim · model-written summary
Yield per vine was unaffected by either trimming or Pinolene spray.
- Taxon
- V. viniferaVitis viniferae0
- Treatment
- post veraison trimming or anti-transpirant spraye5
- Outcome
- Yield per vinee3
- Direction
- unaffectede3
- Comparator
- non-trimmed controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This trial was conducted in 2009 and 2010 on Sangiovese (V. vinifera L.) vines trained to Free Cordon trellis system”
e3“Yield per vine was unaffected by both treatments”
e4“non-trimmed control (C); shoot trimming, 1 week after full veraison (TRIMM )”
e5“test the effects of post veraison trimming or anti-transpirant spray”
Claim · model-written summary
Trimming or Pinolene spray had a higher effect in reducing sugar accumulation rate in 2009 than in 2010.
- Taxon
- V. viniferaVitis viniferae0
- Treatment
- post veraison trimming or anti-transpirant spraye5
- Outcome
- sugars accumulation ratee6
- Direction
- highere6
- Comparator
- 2010e6
- Setting
- 2009e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This trial was conducted in 2009 and 2010 on Sangiovese (V. vinifera L.) vines trained to Free Cordon trellis system”
e5“test the effects of post veraison trimming or anti-transpirant spray”
e6“both treatments showed in 2009 an higher effect in reducing sugars accumulation rate during ripening compared to 2010”
Claim · model-written summary
Pinolene spray was less effective in reducing sugar accumulation in 2010 than the trimming effect in 2010.
- Taxon
- V. viniferaVitis viniferae0
- Treatment
- PIN treatmentse7
- Outcome
- sugars accumulatione6
- Direction
- less effectivee7
- Setting
- 2010e7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This trial was conducted in 2009 and 2010 on Sangiovese (V. vinifera L.) vines trained to Free Cordon trellis system”
e6“both treatments showed in 2009 an higher effect in reducing sugars accumulation rate during ripening compared to 2010”
e7“PIN treatments was less effective in 2010”
Claim · model-written summary
The trimming effect on sugar accumulation, although small, was maintained in the second year.
- Taxon
- V. viniferaVitis viniferae0
- Treatment
- TRIMMe7
- Outcome
- sugars accumulatione6
- Direction
- maintainede7
- Qualifier
- although littlee7
- Setting
- second yeare7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This trial was conducted in 2009 and 2010 on Sangiovese (V. vinifera L.) vines trained to Free Cordon trellis system”
e6“both treatments showed in 2009 an higher effect in reducing sugars accumulation rate during ripening compared to 2010”
e7“TRIMM effect, although little, was maintained also in the second year”
Claim · model-written summary
Post-veraison trimming or anti-transpirant spray did not significantly affect acidity, pH or anthocyanins concentration during ripening.
- Taxon
- V. viniferaVitis viniferae0
- Treatment
- post veraison trimming or anti-transpirant spraye5
- Outcome
- acidity, pH and anthocyanins concentratione6
- Direction
- not significantly affectede6
- Qualifier
- during ripeninge6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This trial was conducted in 2009 and 2010 on Sangiovese (V. vinifera L.) vines trained to Free Cordon trellis system”
e5“test the effects of post veraison trimming or anti-transpirant spray”
e6“Despite the differences in sugar accumulation, acidity, pH and anthocyanins concentration during ripening were not significantly affected by treatments”
Claim · model-written summary
Trimming or Pinolene spray slowed down sugar accumulation during ripening.
- Taxon
- V. viniferaVitis viniferae0
- Treatment
- trimming or Pinolene spraye1
- Outcome
- sugars accumulatione1
- Direction
- slowed downe1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This trial was conducted in 2009 and 2010 on Sangiovese (V. vinifera L.) vines trained to Free Cordon trellis system”
e1“trimming or Pinolene spray, slowed down sugars accumulation”
Claim · model-written summary
Trimming or Pinolene spray improved the synchrony between technological and phenolic ripening.
- Taxon
- V. viniferaVitis viniferae0
- Treatment
- trimming or Pinolene spraye1
- Outcome
- synchrony between technological and phenolic ripeninge2
- Direction
- improvede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This trial was conducted in 2009 and 2010 on Sangiovese (V. vinifera L.) vines trained to Free Cordon trellis system”
e1“trimming or Pinolene spray, slowed down sugars accumulation”
e2“giving rise to an improved synchrony between technological and phenolic ripening”
Claim · model-written summary
The authors conclude that the canopy management techniques demonstrate potential to upgrade enological grape quality under climate warming.
Verbatim
e1“The results demonstrate the potential of the news canopy management techniques to upgrade the enological grape quality”
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See all 30 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.