Abstract
Introduction: Grapevines are an important and economically significant fruit plant that is cultivated worldwide. Most of the world's emerging wine-growing regions are in arid or semi-arid regions that are severely affected by drought. Grafting has emerged as an effective strategy to enhance drought tolerance, but the influence of scion-rootstock combinations on key biochemical and antioxidant parameters under water deficit conditions is not fully understood. Method: The study investigates the effects of grafting on antioxidant enzymes, malondialdehyde (MDA), polyamines and sugar metabolism in five grafted grapevine combinations exposed to three irrigation levels to optimise sustainable grape production in the arid regions of the UAE. Leaf samples were analysed for polyamines, MDA and sugars using liquid chromatography. Results: The study found that the drought-tolerant rootstocks Paulsen, R110 and Ramsey increased cell activity, reduced ROS production, lowered MDA levels and increased antioxidant capabilities. SOD activity increased significantly under 75% and 50% FC by 225% in V1, 316% in V3, 133% in V4 and 1025% in V5. In response to severe drought at 75% and 50% FC, V2 and V5 showed a decrease in MDA accumulation (by 34.2% and 50% in V2 and 23.7% and 57.6% in V5, respectively) compared to 100% FC (0.76 nmoL mL-1 in V2 and 1.18 nmoL mL-1 in V5). Polyamines generally showed an increase with decreasing field capacity, indicating drought tolerance. Different polyamine contents were observed in grafted vines. V1, V2 and V5 showed higher levels of spermine and free spermidine, while V3 and V4 were more sensitive to drought stress. Organic osmolytes positively influenced the enzymatic activity in drought-tolerant grafts. Sugars built up in the grafts and had a signalling function as Osmo protective molecules. The shoots improved sugar metabolism, which led to increased resistance to drought. There was a significant increase in glucose sugar content at 75% and 50% FC, which was 85.7% to 133% at V1, 19% to 76.9% at V2, and decreased by 30% and 53% at V4. Discussion: The results suggest that grafted grapevines have a strong ability to cope with drought stress by upregulating antioxidant enzymes and altering other compounds such as MDA, PA and sugars that are conducive to stress tolerance.
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Claims 17
Claim · model-written summary
Under 75% and 50% FC, SOD activity in V1 increased significantly by 225%.
- Taxon
- grafted grapevinee2
- Material
- V1e1
- Treatment
- 75% and 50% FCe1
- Outcome
- SOD activitye1
- Direction
- increasede1
- Value
- 225%e1
Not reportedComparator
Verbatim
e1“SOD activity increased significantly under 75% and 50% FC by 225% in V1, 316% in V3, 133% in V4 and 1025% in V5”
e2“five grafted grapevine combinations”
Claim · model-written summary
Under 75% and 50% FC, SOD activity in V3 increased significantly by 316%.
- Taxon
- grafted grapevinee2
- Material
- V3e1
- Treatment
- 75% and 50% FCe1
- Outcome
- SOD activitye1
- Direction
- increasede1
- Value
- 316%e1
Not reportedComparator
Verbatim
e1“SOD activity increased significantly under 75% and 50% FC by 225% in V1, 316% in V3, 133% in V4 and 1025% in V5”
e2“five grafted grapevine combinations”
Claim · model-written summary
Under 75% and 50% FC, SOD activity in V4 increased significantly by 133%.
- Taxon
- grafted grapevinee2
- Material
- V4e1
- Treatment
- 75% and 50% FCe1
- Outcome
- SOD activitye1
- Direction
- increasede1
- Value
- 133%e1
Not reportedComparator
Verbatim
e1“SOD activity increased significantly under 75% and 50% FC by 225% in V1, 316% in V3, 133% in V4 and 1025% in V5”
e2“five grafted grapevine combinations”
Claim · model-written summary
Under 75% and 50% FC, SOD activity in V5 increased significantly by 1025%.
- Taxon
- grafted grapevinee2
- Material
- V5e1
- Treatment
- 75% and 50% FCe1
- Outcome
- SOD activitye1
- Direction
- increasede1
- Value
- 1025%e1
Not reportedComparator
Verbatim
e1“SOD activity increased significantly under 75% and 50% FC by 225% in V1, 316% in V3, 133% in V4 and 1025% in V5”
e2“five grafted grapevine combinations”
Claim · model-written summary
Under severe drought at 75% and 50% FC, MDA accumulation in V2 decreased by 34.2% and 50% relative to 100% FC.
Verbatim
e2“five grafted grapevine combinations”
e3“In response to severe drought at 75% and 50% FC, V2 and V5 showed a decrease in MDA accumulation (by 34.2% and 50% in V2 and 23.7% and 57.6% in V5, respectively) compared to 100% FC”
Claim · model-written summary
Under severe drought at 75% and 50% FC, MDA accumulation in V5 decreased by 23.7% and 57.6% relative to 100% FC.
Verbatim
e2“five grafted grapevine combinations”
e3“In response to severe drought at 75% and 50% FC, V2 and V5 showed a decrease in MDA accumulation (by 34.2% and 50% in V2 and 23.7% and 57.6% in V5, respectively) compared to 100% FC”
Claim · model-written summary
V1, V2 and V5 showed higher levels of spermine and free spermidine.
Verbatim
e2“five grafted grapevine combinations”
e4“V1, V2 and V5 showed higher levels of spermine and free spermidine”
Claim · model-written summary
V3 and V4 were more sensitive to drought stress.
Verbatim
e2“five grafted grapevine combinations”
e5“V3 and V4 were more sensitive to drought stress”
Claim · model-written summary
Polyamines generally increased with decreasing field capacity.
Not reportedComparator
Verbatim
e2“five grafted grapevine combinations”
e6“Polyamines generally showed an increase with decreasing field capacity”
Claim · model-written summary
Under 75% and 50% FC, glucose sugar content increased significantly by 85.7% to 133% in V1.
- Taxon
- grafted grapevinee2
- Material
- V1e7
- Treatment
- 75% and 50% FCe7
- Outcome
- glucose sugar contente7
- Direction
- increasee7
- Value
- 85.7% to 133%e7
Not reportedComparator
Verbatim
e2“five grafted grapevine combinations”
e7“There was a significant increase in glucose sugar content at 75% and 50% FC, which was 85.7% to 133% at V1, 19% to 76.9% at V2, and decreased by 30% and 53% at V4”
Claim · model-written summary
Under 75% and 50% FC, glucose sugar content increased by 19% to 76.9% in V2.
- Taxon
- grafted grapevinee2
- Material
- V2e7
- Treatment
- 75% and 50% FCe7
- Outcome
- glucose sugar contente7
- Direction
- increasee7
- Value
- 19% to 76.9%e7
Not reportedComparator
Verbatim
e2“five grafted grapevine combinations”
e7“There was a significant increase in glucose sugar content at 75% and 50% FC, which was 85.7% to 133% at V1, 19% to 76.9% at V2, and decreased by 30% and 53% at V4”
Claim · model-written summary
Under 75% and 50% FC, glucose sugar content decreased by 30% and 53% in V4.
- Taxon
- grafted grapevinee2
- Material
- V4e7
- Treatment
- 75% and 50% FCe7
- Outcome
- glucose sugar contente7
- Direction
- decreasede7
- Value
- 30% and 53%e7
Not reportedComparator
Verbatim
e2“five grafted grapevine combinations”
e7“There was a significant increase in glucose sugar content at 75% and 50% FC, which was 85.7% to 133% at V1, 19% to 76.9% at V2, and decreased by 30% and 53% at V4”
Claim · model-written summary
Organic osmolytes positively influenced enzymatic activity in drought-tolerant grafts.
Verbatim
e2“five grafted grapevine combinations”
e3“Organic osmolytes positively influenced the enzymatic activity in drought-tolerant grafts”
Claim · model-written summary
The drought-tolerant rootstocks Paulsen, R110 and Ramsey increased cell activity.
Verbatim
e2“five grafted grapevine combinations”
e3“The study found that the drought-tolerant rootstocks Paulsen, R110 and Ramsey increased cell activity, reduced ROS production, lowered MDA levels and increased antioxidant capabilities”
Claim · model-written summary
The drought-tolerant rootstocks Paulsen, R110 and Ramsey reduced ROS production.
Verbatim
e2“five grafted grapevine combinations”
e3“The study found that the drought-tolerant rootstocks Paulsen, R110 and Ramsey increased cell activity, reduced ROS production, lowered MDA levels and increased antioxidant capabilities”
Claim · model-written summary
The drought-tolerant rootstocks Paulsen, R110 and Ramsey lowered MDA levels.
Verbatim
e2“five grafted grapevine combinations”
e3“The study found that the drought-tolerant rootstocks Paulsen, R110 and Ramsey increased cell activity, reduced ROS production, lowered MDA levels and increased antioxidant capabilities”
Claim · model-written summary
The drought-tolerant rootstocks Paulsen, R110 and Ramsey increased antioxidant capabilities.
Verbatim
e2“five grafted grapevine combinations”
e3“The study found that the drought-tolerant rootstocks Paulsen, R110 and Ramsey increased cell activity, reduced ROS production, lowered MDA levels and increased antioxidant capabilities”
The same questions in other papers
drought · physiology: oxidative · VitisResults differ
2 papers in the same direction as this paper · 9 in the opposite direction
- negative
- negative
- no effect
8 papers more in this group
See all 12 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.