Abstract
The influence of fruits on export and distribution of photosynthates was studied in Vitis vinifera L. cv. Tempranillo using 14C labelling. Also, the influence of water stress was analysed in fruiting and fruitless plants of Tempranillo and fruiting plants of cv. Alfonso Lavallée. In fruitless plants of Tempranillo, reserve organs (trunk, roots and lower shoot) represented 80% of total plant dry matter (DM), and imported up to 90% of the total 14C exported from the fed leaf. Therefore, the distribution pattern of photosynthates in these plants reflected mainly the sink size. However, the presence of fruits in Tempranillo strongly stimulated 14C export and changed the distribution pattern of assimilates. Fruits imported up to 70–80% of the total 14C exported, while representing only 25% of the total plant DM. Therefore, the strength of fruits as carbon sinks was independent of sink size, and it is discussed on the basis of a water potential gradient theory. Water stress caused a significant reduction of leaf water potential, photosynthesis and stomatal conductance, but caused only a slight, non-significant, decrease of carbohydrate export from the fed leaves, and did not affect the distribution pattern of 14C except in some minor fractions in Tempranillo. The 14C distribution into different fruit components was also unaffected. In contrast, in Alfonso Lavallée water stress resulted in a highly significant reduction of export, and an altered photosynthate distribution pattern. These differences could be due to the lower water potential attained in stressed Alfonso Lavallée plants.
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Claims 10
Claim · model-written summary
The presence of fruits strongly stimulated 14C export from the fed leaf compared with fruitless plants.
- Taxon
- Vitis vinifera
Vitis viniferat0 - Treatment
- presence of fruitse1
- Outcome
- 14C exporte1
- Direction
- stimulatede1
- Comparator
- fruitless plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera”
e0“In fruitless plants of Tempranillo”
e1“the presence of fruits in Tempranillo strongly stimulated 14C export and changed the distribution pattern of assimilates”
Claim · model-written summary
The presence of fruits changed the distribution pattern of assimilates compared with fruitless plants.
- Taxon
- Vitis viniferaVitis viniferat0
- Treatment
- presence of fruitse1
- Outcome
- distribution pattern of assimilatese1
- Direction
- changede1
- Comparator
- fruitless plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera”
e0“In fruitless plants of Tempranillo”
e1“the presence of fruits in Tempranillo strongly stimulated 14C export and changed the distribution pattern of assimilates”
Claim · model-written summary
Fruits imported 70–80% of the total 14C exported while representing only 25% of total plant dry matter.
- Taxon
- Vitis viniferaVitis viniferat0
- Organ / stage
- Fruitse2
- Outcome
- 14C exportede2
- Value
- 70–80%e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera”
e2“Fruits imported up to 70–80% of the total 14C exported, while representing only 25% of the total plant DM”
Claim · model-written summary
The strength of fruits as carbon sinks was independent of sink size.
- Taxon
- Vitis viniferaVitis viniferat0
- Organ / stage
- fruitse3
- Outcome
- strength of fruits as carbon sinkse3
- Qualifier
- independent of sink sizee3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera”
e3“Therefore, the strength of fruits as carbon sinks was independent of sink size”
Claim · model-written summary
Water stress significantly reduced leaf water potential, photosynthesis and stomatal conductance.
- Taxon
- Vitis viniferaVitis viniferat0
- Treatment
- Water stresse4
- Outcome
- leaf water potential, photosynthesis and stomatal conductancee4
- Direction
- reductione4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera”
e4“Water stress caused a significant reduction of leaf water potential, photosynthesis and stomatal conductance”
Claim · model-written summary
Water stress caused only a slight, non-significant decrease of carbohydrate export from the fed leaves.
- Taxon
- Vitis viniferaVitis viniferat0
- Treatment
- Water stresse4
- Outcome
- carbohydrate export from the fed leavese5
- Direction
- decreasee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera”
e4“Water stress caused a significant reduction of leaf water potential, photosynthesis and stomatal conductance”
e5“but caused only a slight, non-significant, decrease of carbohydrate export from the fed leaves”
Claim · model-written summary
Water stress did not affect the distribution pattern of 14C in Tempranillo, except in some minor fractions.
- Taxon
- Vitis viniferaVitis viniferat0
- Material
- Tempranilloe6
- Treatment
- Water stresse4
- Outcome
- distribution pattern of 14Ce6
- Direction
- did not affecte6
- Qualifier
- except in some minor fractionse6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera”
e4“Water stress caused a significant reduction of leaf water potential, photosynthesis and stomatal conductance”
e6“did not affect the distribution pattern of 14C except in some minor fractions in Tempranillo”
Claim · model-written summary
Water stress did not change the 14C distribution into different fruit components.
- Taxon
- Vitis viniferaVitis viniferat0
- Treatment
- Water stresse4
- Outcome
- 14C distribution into different fruit componentse7
- Direction
- unaffectede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera”
e4“Water stress caused a significant reduction of leaf water potential, photosynthesis and stomatal conductance”
e7“The 14C distribution into different fruit components was also unaffected”
Claim · model-written summary
In Alfonso Lavallée, water stress significantly reduced photosynthate export.
- Taxon
- Vitis viniferaVitis viniferat0
- Material
- Alfonso Lavalléee5
- Treatment
- water stresse5
- Outcome
- exporte5
- Direction
- reductione5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera”
e5“In contrast, in Alfonso Lavallée water stress resulted in a highly significant reduction of export”
Claim · model-written summary
In Alfonso Lavallée, water stress altered the photosynthate distribution pattern.
- Taxon
- Vitis viniferaVitis viniferat0
- Material
- Alfonso Lavalléee5
- Treatment
- water stresse5
- Outcome
- photosynthate distribution patterne6
- Direction
- alterede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera”
e5“In contrast, in Alfonso Lavallée water stress resulted in a highly significant reduction of export”
e6“and an altered photosynthate distribution pattern”
The same questions in other papers
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See all 13 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.