Abstract
Drought-acclimated vines maintained higher gas exchange compared to irrigated controls under water deficit; this effect is associated with modified leaf turgor but not with improved petiole vulnerability to cavitation. A key feature for the prosperity of plants under changing environments is the plasticity of their hydraulic system. In the present research we studied the hydraulic regulation in grapevines (Vitis vinifera L.) that were first acclimated for 39 days to well-watered (WW), sustained water deficit (SD), or transient—cycles of dehydration–rehydration—water deficit (TD) conditions, and then subjected to varying degrees of drought. Vine development under SD led to the smallest leaves and petioles, but the TD vines had the smallest mean xylem vessel and calculated specific conductivity (k ts). Unexpectedly, both the water deficit acclimation treatments resulted in vines more vulnerable to cavitation in comparison to WW, possibly as a result of developmental differences or cavitation fatigue. When exposed to drought, the SD vines maintained the highest stomatal (g s) and leaf conductance (k leaf) under low stem water potential (Ψs), despite their high xylem vulnerability and in agreement with their lower turgor loss point (ΨTLP). These findings suggest that the down-regulation of k leaf and g s is not associated with embolism, and the ability of drought-acclimated vines to maintain hydraulic conductance and gas exchange under stressed conditions is more likely associated with the leaf turgor and membrane permeability.
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Claims 9
Claim · model-written summary
Drought-acclimated vines maintained higher gas exchange than irrigated controls under water deficit.
- Taxon
- Vitis vinifera
Vitis viniferae1 - Treatment
- water deficite0
- Outcome
- gas exchangee0
- Direction
- highere0
- Comparator
- irrigated controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought-acclimated vines maintained higher gas exchange compared to irrigated controls under water deficit”
e1“grapevines (Vitis vinifera L.)”
Claim · model-written summary
The gas exchange effect of drought acclimation is associated with modified leaf turgor.
- Taxon
- Vitis viniferaVitis viniferae1
- Treatment
- water deficite0
- Outcome
- leaf turgore0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought-acclimated vines maintained higher gas exchange compared to irrigated controls under water deficit; this effect is associated with modified leaf turgor”
e1“grapevines (Vitis vinifera L.)”
Claim · model-written summary
Vines under sustained water deficit (SD) had the smallest leaves and petioles.
- Taxon
- Vitis viniferaVitis viniferae1
- Treatment
- SDe2
- Outcome
- leaves and petiolese2
- Direction
- smalleste2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Vine development under SD led to the smallest leaves and petioles”
e1“grapevines (Vitis vinifera L.)”
Claim · model-written summary
Transient water deficit (TD) vines had the smallest mean xylem vessel and calculated specific conductivity.
- Taxon
- Vitis viniferaVitis viniferae1
- Treatment
- TDe2
- Outcome
- mean xylem vessel and calculated specific conductivitye2
- Direction
- smalleste2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“the TD vines had the smallest mean xylem vessel and calculated specific conductivity (k ts)”
e1“grapevines (Vitis vinifera L.)”
Claim · model-written summary
Both water deficit acclimation treatments made vines more vulnerable to cavitation than well-watered (WW) vines.
- Taxon
- Vitis viniferaVitis viniferae1
- Treatment
- water deficit acclimation treatmentse3
- Outcome
- more vulnerable to cavitatione3
- Direction
- more vulnerablee3
- Comparator
- WWe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“both the water deficit acclimation treatments resulted in vines more vulnerable to cavitation in comparison to WW”
e1“grapevines (Vitis vinifera L.)”
Claim · model-written summary
Under drought, SD vines maintained the highest stomatal and leaf conductance.
- Taxon
- Vitis viniferaVitis viniferae1
- Treatment
- SDe4
- Outcome
- stomatal (g s) and leaf conductance (k leaf)e4
- Direction
- higheste4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“the SD vines maintained the highest stomatal (g s) and leaf conductance (k leaf)”
e1“grapevines (Vitis vinifera L.)”
Claim · model-written summary
SD vines had a lower turgor loss point.
- Taxon
- Vitis viniferaVitis viniferae1
- Treatment
- SDe5
- Outcome
- turgor loss pointe6
- Direction
- lowere6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“the SD vines”
e6“in agreement with their lower turgor loss point”
e1“grapevines (Vitis vinifera L.)”
Claim · model-written summary
Down-regulation of leaf conductance is not associated with embolism.
- Taxon
- Vitis viniferaVitis viniferae1
- Organ / stage
- leafe2
- Outcome
- down-regulation of k leaf and g se2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“the down-regulation of k leaf and g s is not associated with embolism”
e1“grapevines (Vitis vinifera L.)”
Claim · model-written summary
Maintenance of hydraulic conductance and gas exchange under stress is more likely associated with leaf turgor and membrane permeability than with embolism.
- Taxon
- Vitis viniferaVitis viniferae1
- Outcome
- hydraulic conductance and gas exchangee6
- Qualifier
- leaf turgor and membrane permeabilitye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“the ability of drought-acclimated vines to maintain hydraulic conductance and gas exchange under stressed conditions is more likely associated with the leaf turgor and membrane permeability”
e1“grapevines (Vitis vinifera L.)”
The same questions in other papers
drought · physiology: gas exchange · Vitis vinifera (wine grape)Positive and negative results
5 in the opposite direction
- negative
- negative
- negative
2 papers more in this group
See all 6 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.