Abstract
Aim: The present study was conducted in grapevines to evaluate the influence of source/sink disturbance on reserve restoration in the entire plant (trunk, roots) and the consequences on reproduction, yield, sugar yield, potential alcohol content and total acidity over four successive years of treatment. Methods and results: At véraison, either total defoliation or total fruit removal was performed on Chardonnay plants grown in vineyards. The impact was measured each year on reproductive parameters and after four years on both plant weight and carbohydrate content. Defoliation induced an alteration in carbohydrate distribution in the entire plant, as revealed by decrease of starch content and parallel increase of soluble sugar content. These modifications affected the number of inflorescences/clusters per plant the year after. By contrast, fruit removal resulted in a significant increase of carbohydrate reserves in the whole plant, although the efficiency of sexual reproduction was not improved the year after. Conclusion: Results confirm the close correlation between carbohydrate reserves and the efficiency of sexual reproduction. Moreover, grapevine is able to adapt the number of both inflorescences and flowers according to the amount of available carbohydrate reserves in perennial organs. Significance and impact of the study: The quality of the crop is affected by defoliation, as shown by the decrease in yield and sugar yield. However, the impact on potential alcohol content and total acidity was less pronounced.
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Claims 9
Claim · model-written summary
Defoliation decreased starch content in the entire Chardonnay grapevine.
VitisNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Defoliation induced an alteration in carbohydrate distribution in the entire plant, as revealed by decrease of starch content and parallel increase of soluble sugar content”
e7“At véraison, either total defoliation or total fruit removal was performed on Chardonnay plants grown in vineyards”
e4“grapevine is able to adapt the number of both inflorescences and flowers according to the amount of available carbohydrate reserves in perennial organs”
Claim · model-written summary
Defoliation increased soluble sugar content in the entire Chardonnay grapevine.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Defoliation induced an alteration in carbohydrate distribution in the entire plant, as revealed by decrease of starch content and parallel increase of soluble sugar content”
e7“At véraison, either total defoliation or total fruit removal was performed on Chardonnay plants grown in vineyards”
e4“grapevine is able to adapt the number of both inflorescences and flowers according to the amount of available carbohydrate reserves in perennial organs”
Claim · model-written summary
Defoliation altered the number of inflorescences or clusters per plant the year after.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Defoliation induced an alteration in carbohydrate distribution in the entire plant”
e1“These modifications affected the number of inflorescences/clusters per plant the year after”
e4“grapevine is able to adapt the number of both inflorescences and flowers according to the amount of available carbohydrate reserves in perennial organs”
Claim · model-written summary
Fruit removal significantly increased carbohydrate reserves in the whole plant.
- Treatment
- fruit removale2
- Outcome
- carbohydrate reservese2
- Direction
- increasee2
- Qualifier
- in the whole plante2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“By contrast, fruit removal resulted in a significant increase of carbohydrate reserves in the whole plant, although the efficiency of sexual reproduction was not improved the year after”
e4“grapevine is able to adapt the number of both inflorescences and flowers according to the amount of available carbohydrate reserves in perennial organs”
Claim · model-written summary
Fruit removal did not improve the efficiency of sexual reproduction the year after.
- Treatment
- fruit removale2
- Outcome
- efficiency of sexual reproductione2
- Direction
- not improvede2
- Qualifier
- the year aftere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“By contrast, fruit removal resulted in a significant increase of carbohydrate reserves in the whole plant, although the efficiency of sexual reproduction was not improved the year after”
e4“grapevine is able to adapt the number of both inflorescences and flowers according to the amount of available carbohydrate reserves in perennial organs”
Claim · model-written summary
Defoliation decreased yield and sugar yield of grapevine.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“The quality of the crop is affected by defoliation, as shown by the decrease in yield and sugar yield”
e4“grapevine is able to adapt the number of both inflorescences and flowers according to the amount of available carbohydrate reserves in perennial organs”
Claim · model-written summary
Defoliation had a less pronounced impact on potential alcohol content and total acidity.
- Treatment
- defoliatione5
- Outcome
- potential alcohol content and total aciditye6
- Direction
- less pronouncede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“The quality of the crop is affected by defoliation”
e6“However, the impact on potential alcohol content and total acidity was less pronounced”
e4“grapevine is able to adapt the number of both inflorescences and flowers according to the amount of available carbohydrate reserves in perennial organs”
Claim · model-written summary
Carbohydrate reserves are closely correlated with the efficiency of sexual reproduction in grapevine.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Results confirm the close correlation between carbohydrate reserves and the efficiency of sexual reproduction”
e4“grapevine is able to adapt the number of both inflorescences and flowers according to the amount of available carbohydrate reserves in perennial organs”
Claim · model-written summary
Grapevine adapts the number of inflorescences and flowers to the amount of carbohydrate reserves in perennial organs.
- Outcome
- number of both inflorescences and flowerse4
- Qualifier
- according to the amount of available carbohydrate reserves in perennial organse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“grapevine is able to adapt the number of both inflorescences and flowers according to the amount of available carbohydrate reserves in perennial organs”
The same questions in other papers
pruning · quality: sugar starch · VitisResults differ
19 papers in the same direction as this paper · 41 in the opposite direction
- negative
- positive
- positive
57 papers more in this group
See all 61 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.