Abstract
Light pruning and deficit irrigation regimes are practices which are widely used in high yielding commercial vineyards in the warm climate regions of Australia. Little information is available on their impacts on carbohydrate dynamics in vegetative organs within and between seasons, and on the resulting plant capacity to maintain productivity and ripen fruits. This study was conducted to address this gap in knowledge over five vintages on Vitis vinifera L. cv. Cabernet Franc, Shiraz, and Cabernet Sauvignon in the Sunraysia region of Victoria, Australia. Lighter pruning did not change the total carbohydrates concentration and composition in wood and roots within seasons in Cabernet Franc and Shiraz. However, the total carbohydrate pool (starch and soluble sugars) at the end of dormancy increased under lighter pruning, due to higher vine size, associated with retention and growth of old-wood (trunk and cordons). Water deficit negatively impacted trunk and leaf starch concentrations, over the day and within seasons in Cabernet Sauvignon. Soluble sugars concentrations in these tissues tended to be higher under limited water supply, possibly due to higher sugar mobilization as photosynthesis decreased. Trunk carbohydrate concentrations markedly varied within and between seasons, highlighting the importance of interactive factors such as crop load and climate on carbon status. The period between fruit-set and véraison was shown to be critical for its impact on the balance between carbon accretion and depletion, especially under water deficit. The lower leaf and trunk starch concentration under water deficit resulted in a decrease of yield components at harvest, while similar yields were reached for all pruning systems. The sugar allocated to berries at harvest remained remarkably stable for all practices and seasons, irrespective of vine yield and carbohydrate status in vegetative organs in Shiraz and Cabernet Sauvignon.
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Claims 9
Claim · model-written summary
Lighter pruning did not change total carbohydrate concentration and composition in wood and roots within seasons in Cabernet Franc and Shiraz grapevines.
- Taxon
- Vitis vinifera L.
Vitis viniferae1 - Material
- Cabernet Franc and Shiraze0
- Organ / stage
- wood and rootse0
- Treatment
- Lighter pruninge0
- Outcome
- total carbohydrates concentration and compositione0
- Direction
- did not changee0
- Setting
- Sunraysia region of Victoria, Australiae1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lighter pruning did not change the total carbohydrates concentration and composition in wood and roots within seasons in Cabernet Franc and Shiraz”
e1“Vitis vinifera L. cv. Cabernet Franc, Shiraz, and Cabernet Sauvignon in the Sunraysia region of Victoria, Australia”
Claim · model-written summary
The total carbohydrate pool (starch and soluble sugars) at the end of dormancy increased under lighter pruning, due to higher vine size.
- Taxon
- Vitis vinifera L.Vitis viniferae1
- Organ / stage
- end of dormancye0
- Treatment
- lighter pruninge0
- Outcome
- total carbohydrate poole0
- Direction
- increasede0
- Qualifier
- due to higher vine sizee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the total carbohydrate pool (starch and soluble sugars) at the end of dormancy increased under lighter pruning, due to higher vine size”
e1“Vitis vinifera L. cv. Cabernet Franc, Shiraz, and Cabernet Sauvignon in the Sunraysia region of Victoria, Australia”
Claim · model-written summary
Water deficit negatively impacted trunk and leaf starch concentrations over the day and within seasons in Cabernet Sauvignon.
- Taxon
- Vitis vinifera L.Vitis viniferae1
- Material
- Cabernet Sauvignone0
- Treatment
- Water deficite0
- Outcome
- trunk and leaf starch concentrationse0
- Direction
- negatively impactede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water deficit negatively impacted trunk and leaf starch concentrations, over the day and within seasons in Cabernet Sauvignon”
e1“Vitis vinifera L. cv. Cabernet Franc, Shiraz, and Cabernet Sauvignon in the Sunraysia region of Victoria, Australia”
Claim · model-written summary
Soluble sugar concentrations in trunk and leaf tissues tended to be higher under limited water supply.
- Taxon
- Vitis vinifera L.Vitis viniferae1
- Treatment
- limited water supplye0
- Outcome
- Soluble sugars concentrationse0
- Direction
- highere0
- Qualifier
- tended to bee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soluble sugars concentrations in these tissues tended to be higher under limited water supply”
e1“Vitis vinifera L. cv. Cabernet Franc, Shiraz, and Cabernet Sauvignon in the Sunraysia region of Victoria, Australia”
Claim · model-written summary
Trunk carbohydrate concentrations varied markedly within and between seasons.
- Taxon
- Vitis vinifera L.Vitis viniferae1
- Organ / stage
- Trunke0
- Outcome
- Trunk carbohydrate concentrationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Trunk carbohydrate concentrations markedly varied within and between seasons”
e1“Vitis vinifera L. cv. Cabernet Franc, Shiraz, and Cabernet Sauvignon in the Sunraysia region of Victoria, Australia”
Claim · model-written summary
The period between fruit-set and veraison was critical for the balance between carbon accretion and depletion, especially under water deficit.
- Taxon
- Vitis vinifera L.Vitis viniferae1
- Organ / stage
- period between fruit-set and véraisone0
- Treatment
- water deficite0
- Outcome
- balance between carbon accretion and depletione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The period between fruit-set and véraison was shown to be critical for its impact on the balance between carbon accretion and depletion, especially under water deficit”
e1“Vitis vinifera L. cv. Cabernet Franc, Shiraz, and Cabernet Sauvignon in the Sunraysia region of Victoria, Australia”
Claim · model-written summary
The lower leaf and trunk starch concentration under water deficit resulted in a decrease of yield components at harvest.
- Taxon
- Vitis vinifera L.Vitis viniferae1
- Organ / stage
- harveste0
- Treatment
- water deficite0
- Outcome
- yield componentse0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lower leaf and trunk starch concentration under water deficit resulted in a decrease of yield components at harvest”
e1“Vitis vinifera L. cv. Cabernet Franc, Shiraz, and Cabernet Sauvignon in the Sunraysia region of Victoria, Australia”
Claim · model-written summary
Similar yields were reached for all pruning systems.
- Taxon
- Vitis vinifera L.Vitis viniferae1
- Treatment
- pruning systemse0
- Outcome
- yieldse0
- Direction
- similare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“similar yields were reached for all pruning systems”
e1“Vitis vinifera L. cv. Cabernet Franc, Shiraz, and Cabernet Sauvignon in the Sunraysia region of Victoria, Australia”
Claim · model-written summary
The sugar allocated to berries at harvest remained remarkably stable for all practices and seasons in Shiraz and Cabernet Sauvignon, irrespective of vine yield and carbohydrate status in vegetative organs.
- Taxon
- Vitis vinifera L.Vitis viniferae1
- Material
- Shiraz and Cabernet Sauvignone0
- Organ / stage
- berriese0
- Treatment
- all practicese0
- Outcome
- sugar allocated to berriese0
- Direction
- remained remarkably stablee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sugar allocated to berries at harvest remained remarkably stable for all practices and seasons, irrespective of vine yield and carbohydrate status in vegetative organs in Shiraz and Cabernet Sauvignon”
e1“Vitis vinifera L. cv. Cabernet Franc, Shiraz, and Cabernet Sauvignon in the Sunraysia region of Victoria, Australia”
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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.