Abstract
The impact of climate change on viticulture is of major importance. Several international and indigenous grapevine cultivars have been examined for their adaptive performance to drought and heat stresses. However, the underlying physiological mechanisms are not well known. In the present study we examined the short-term effects of light and moderate drought stress (DS) as well as heat stress (HS) on physiological and biochemical attributes in two grapevine cultivars: Chardonnay (international) and Xynisteri, an indigenous adapted to the specific Cypriot microclimate. Xynisteri plants exhibited decreasing leaf stomatal conductance and photosynthetic rate as well as increasing total phenols and antioxidant capacity under DS conditions. These reactions were concomitant to a rapid accumulation of hydrogen peroxide and lipid peroxidation in leaves, associated to an increase of the antioxidant superoxide dismutase activity. However, Chardonnay plants did not exhibit the same responses as Xynisteri against DS (i.e., stomatal closure, total phenolics and antioxidants) over the first four days. Additionally, Chardonnay showed leaf damage with increased lipid peroxidation levels and activation of catalase and peroxidase. Interestingly, HS increased leaf stomatal conductance and decreased total phenolic content, flavonoids and antioxidant capacity in Chardonnay after 20 d of stress. In both cultivars, HS had milder effects compared to DS, and again Xynisteri showed better performance than Chardonnay in terms of damage index and antioxidative activities. Overall, Xynisteri adaptation to DS and HS was higher than that of Chardonnay, and both cultivars reacted more to the short-term DS than to HS. Although the Xynisteri performances under stress conditions provide an important resource for adaptation to stressful conditions, the impacts on earliness, yield and grape quality remain to be explored.
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Claims 14
Claim · model-written summary
Drought decreased Xynisteri leaf stomatal conductance and photosynthetic rate.
- Material
- Xynisterie0
- Treatment
- DS conditionse0
- Outcome
- leaf stomatal conductance and photosynthetic ratee0
- Direction
- decreasinge0
VitisNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Xynisteri plants exhibited decreasing leaf stomatal conductance and photosynthetic rate as well as increasing total phenols and antioxidant capacity under DS conditions”
e1“two grapevine cultivars: Chardonnay (international) and Xynisteri”
Claim · model-written summary
Drought increased Xynisteri total phenols and antioxidant capacity.
- Material
- Xynisterie0
- Treatment
- DS conditionse0
- Outcome
- total phenols and antioxidant capacitye0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Xynisteri plants exhibited decreasing leaf stomatal conductance and photosynthetic rate as well as increasing total phenols and antioxidant capacity under DS conditions”
e1“two grapevine cultivars: Chardonnay (international) and Xynisteri”
Claim · model-written summary
Xynisteri drought responses coincided with rapid leaf hydrogen peroxide accumulation and lipid peroxidation.
- Material
- Xynisterie1
- Organ / stage
- leavese0
- Outcome
- accumulation of hydrogen peroxide and lipid peroxidatione0
- Direction
- accumulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These reactions were concomitant to a rapid accumulation of hydrogen peroxide and lipid peroxidation in leaves”
e1“Xynisteri plants exhibited decreasing leaf stomatal conductance and photosynthetic rate as well as increasing total phenols and antioxidant capacity under DS conditions”
e2“two grapevine cultivars”
Claim · model-written summary
The Xynisteri oxidative responses were associated with increased superoxide dismutase activity.
- Material
- Xynisterie1
- Compound
- hydrogen peroxidee0
- Outcome
- superoxide dismutase activitye0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a rapid accumulation of hydrogen peroxide and lipid peroxidation in leaves, associated to an increase of the antioxidant superoxide dismutase activity”
e1“two grapevine cultivars: Chardonnay (international) and Xynisteri”
Claim · model-written summary
Chardonnay did not show the same drought stomatal closure, phenolic and antioxidant responses as Xynisteri over the first four days.
- Material
- Chardonnaye0
- Treatment
- DSe0
- Outcome
- stomatal closure, total phenolics and antioxidantse0
- Qualifier
- over the first four dayse0
- Comparator
- Xynisterie0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chardonnay plants did not exhibit the same responses as Xynisteri against DS (i.e., stomatal closure, total phenolics and antioxidants) over the first four days”
e1“two grapevine cultivars”
Claim · model-written summary
Chardonnay showed leaf damage and increased lipid peroxidation.
- Material
- Chardonnaye0
- Outcome
- leaf damage with increased lipid peroxidation levelse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chardonnay showed leaf damage with increased lipid peroxidation levels and activation of catalase and peroxidase”
e1“two grapevine cultivars”
Claim · model-written summary
Chardonnay activated catalase and peroxidase.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chardonnay showed leaf damage with increased lipid peroxidation levels and activation of catalase and peroxidase”
e1“two grapevine cultivars”
Claim · model-written summary
Heat increased Chardonnay leaf stomatal conductance after 20 days.
- Material
- Chardonnaye0
- Treatment
- HSe0
- Outcome
- leaf stomatal conductancee0
- Direction
- increasede0
- Qualifier
- after 20 d of stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HS increased leaf stomatal conductance and decreased total phenolic content, flavonoids and antioxidant capacity in Chardonnay after 20 d of stress”
e1“two grapevine cultivars”
Claim · model-written summary
Heat decreased Chardonnay total phenolic content, flavonoids and antioxidant capacity after 20 days.
- Material
- Chardonnaye0
- Treatment
- HSe0
- Outcome
- total phenolic content, flavonoids and antioxidant capacitye0
- Direction
- decreasede0
- Qualifier
- after 20 d of stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HS increased leaf stomatal conductance and decreased total phenolic content, flavonoids and antioxidant capacity in Chardonnay after 20 d of stress”
e1“two grapevine cultivars”
Claim · model-written summary
Heat had milder effects than drought in Xynisteri.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both cultivars, HS had milder effects compared to DS”
e1“two grapevine cultivars: Chardonnay (international) and Xynisteri”
Claim · model-written summary
Heat had milder effects than drought in Chardonnay.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both cultivars, HS had milder effects compared to DS”
e1“two grapevine cultivars: Chardonnay (international) and Xynisteri”
Claim · model-written summary
Xynisteri outperformed Chardonnay in damage index and antioxidative activities.
- Material
- Xynisterie0
- Outcome
- damage index and antioxidative activitiese0
- Direction
- better performancee0
- Comparator
- Chardonnaye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Xynisteri showed better performance than Chardonnay in terms of damage index and antioxidative activities”
e1“two grapevine cultivars”
Claim · model-written summary
The authors conclude that Xynisteri adaptation to drought was higher than Chardonnay adaptation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Xynisteri adaptation to DS and HS was higher than that of Chardonnay”
e1“two grapevine cultivars”
Claim · model-written summary
The authors conclude that Xynisteri adaptation to heat was higher than Chardonnay adaptation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Xynisteri adaptation to DS and HS was higher than that of Chardonnay”
e1“two grapevine cultivars”
The same questions in other papers
drought · quality: phytochemicals · VitisResults differ
11 papers in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- no effect
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See all 17 papers →heat · quality: phytochemicals · VitisPositive and negative results
8 papers in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
9 papers more in this group
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.