Abstract
Blueberry (Vaccinium corymbosum L.) is well adapted to acidic soils where aluminum (Al 3+ ) can be linked to oxidative stress and antioxidant capacity (AC).Calcium sulfate (CaSO 4 ) is used to alleviate Al 3+ because it does not alter soil acidity.However, the role of Ca addition in AC, based on a single electron transfer reaction (SET), remains unknown.The aim was to evaluate the AC using SET methodologies, i.e., 2,2-diphenyl-2-picrylhydrazyl (DPPH), 2,2´-Azinobis-bis (3 ethylbenzothiazoline-6-sulphonic acid) (ABTS) and ferric reducing-antioxidant power (FRAP).Bueberry cultivars Elliot and Jersey were grown and exposed to the following treatments for 15 days: Control (nutrient solution alone, pH 4.5); control+Al (Al); control+Al+Ca (Al+Ca) and control+Ca (Ca).The Ca and Al concentrations, total phenol (TP) content and radical scavenging activity (RSA) were evaluated at 7 and 15 days.The Al+Ca and Ca treatments increased the Ca concentration in the leaves (22%) and roots (40%) of both cultivars compared with the control.The Ca in the tissues varied with cultivar and time.After 15 days, increases in TP, DPPH, ABTS and FRAP were detected.The cultivars showed positive relationships between the TP and AC in the leaves and roots.Thus, CaSO 4 is an important tool to improve the AC in Al-stressed fruit crops grown in acid soils.
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Claims 7
Claim · model-written summary
Al+Ca and Ca treatments raised leaf calcium concentration by 22% versus control.
Verbatim
e0“The Al+Ca and Ca treatments increased the Ca concentration in the leaves (22%) and roots (40%) of both cultivars compared with the control.”
e1“Blueberry (Vaccinium corymbosum L.) is well adapted to acidic soils”
Claim · model-written summary
Al+Ca and Ca treatments raised root calcium concentration by 40% versus control.
Verbatim
e0“The Al+Ca and Ca treatments increased the Ca concentration in the leaves (22%) and roots (40%) of both cultivars compared with the control.”
e1“Blueberry (Vaccinium corymbosum L.) is well adapted to acidic soils”
Claim · model-written summary
Tissue calcium varied by cultivar and time.
Not reportedDirection
Verbatim
e0“The Ca in the tissues varied with cultivar and time.”
e1“Blueberry (Vaccinium corymbosum L.) is well adapted to acidic soils”
Claim · model-written summary
Total phenol content rose after 15 days.
Verbatim
e0“After 15 days, increases in TP, DPPH, ABTS and FRAP were detected.”
e1“Blueberry (Vaccinium corymbosum L.) is well adapted to acidic soils”
Claim · model-written summary
DPPH, ABTS and FRAP measures rose after 15 days.
Verbatim
e0“After 15 days, increases in TP, DPPH, ABTS and FRAP were detected.”
e1“Blueberry (Vaccinium corymbosum L.) is well adapted to acidic soils”
Claim · model-written summary
Total phenols were positively related to antioxidant capacity in leaves and roots.
Verbatim
e0“The cultivars showed positive relationships between the TP and AC in the leaves and roots.”
e1“Blueberry (Vaccinium corymbosum L.) is well adapted to acidic soils”
Claim · model-written summary
The authors recommend CaSO 4 to improve antioxidant capacity of aluminum-stressed fruit crops.
Verbatim
e0“Thus, CaSO 4 is an important tool to improve the AC in Al-stressed fruit crops grown in acid soils.”
The same questions in other papers
calcium atom · nutrient: content · VacciniumResults differ
1 paper in the same direction as this paper · 3 in the opposite direction
- no effect
- no effect
- negative
1 paper more in this group
See all 5 papers →aluminium atom · nutrient: content · VacciniumResults agree
1 paper in the same direction as this paper
- positive
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.