Abstract
Physiological and leaf anatomical characteristics were studied in grapevine (Vitis vinifera L.) cv Touriga Franca grown under field conditions in ambient (365 ± 10 ppm) or elevated CO2 (500 ± 16 ppm) under Open-top chambers (OTCs). Net CO2 assimilation rate (A) was significantly increased, whereas stomatal conductance (gs) was reduced in elevated CO2, leading to improvements in intrinsic water use efficiency. The decrease in gs was dependent from a reduction of stomatal density and from direct effects of CO2 on the stomata guard cells. Palisade and spongy parenchyma thickness were significantly higher in leaves grown under elevated CO2 conditions. These findings may be used in scaling up models to improve their ability to predict the magnitude of grapevine responses to climate change in the Mediterranean area.
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Claims 7
Claim · model-written summary
Elevated CO2 significantly increased grapevine net CO2 assimilation rate.
VitisNot reportedMaterialComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Net CO2 assimilation rate (A) was significantly increased, whereas stomatal conductance (gs) was reduced in elevated CO2”
t0“grapevines”
Claim · model-written summary
Elevated CO2 reduced grapevine stomatal conductance.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Net CO2 assimilation rate (A) was significantly increased, whereas stomatal conductance (gs) was reduced in elevated CO2”
t0“grapevines”
Claim · model-written summary
Elevated CO2 improved intrinsic water use efficiency in grapevine.
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leading to improvements in intrinsic water use efficiency”
t0“grapevines grown at an elevated CO2 concentration”
Claim · model-written summary
Reduced stomatal density contributed to decreased grapevine stomatal conductance.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The decrease in gs was dependent from a reduction of stomatal density”
t0“grapevines”
Claim · model-written summary
Direct effects of CO2 on guard cells contributed to decreased grapevine stomatal conductance.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The decrease in gs was dependent from a reduction of stomatal density and from direct effects of CO2 on the stomata guard cells”
t0“grapevines”
Claim · model-written summary
Palisade parenchyma thickness was significantly higher under elevated CO2.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Palisade and spongy parenchyma thickness were significantly higher in leaves grown under elevated CO2 conditions”
t0“grapevines”
Claim · model-written summary
Spongy parenchyma thickness was significantly higher under elevated CO2.
- Organ / stage
- leavese0
- Treatment
- elevated CO2 conditionse0
- Outcome
- spongy parenchyma thicknesse0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Palisade and spongy parenchyma thickness were significantly higher in leaves grown under elevated CO2 conditions”
t0“grapevines”
The same questions in other papers
co2 · physiology: gas exchange · VitisPositive and negative results
1 in the opposite direction
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co2 · physiology: photosynthesis · VitisPositive and negative results
6 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
4 papers more in this group
See all 8 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.