Abstract
This work aimed to underline the dynamics of photosynthetic and oxidative stress parameters of ‘Matador’ and ‘Andromeda’ spinach species after short-term 1 and 2 kJm–2 UV-B radiation effect. When plants reached 3–4 leaves growths stage, the exposure to 1 kJm–2 and 2 kJm–2 UV-B radiation was done once for 68 and 136 minutes, respectively. The photosynthetic and oxidative stress parameters were determined 2, 24, 48 and 72 hours after exposure. The stimulating effect of UV-B emerged on the 3rd day after exposure. The positive effect of UV-B was more pronounced for ‘Matador’. The highest DPPH radical-scavenging capacity and the highest concentration of α-tocopherols were detected 24 hours after 2 kJ UV-B exposure, but the decrease in photosynthetic rate was the highest as well. Meanwhile, on the 3rd day after 1 kJ UV-B exposure, the indicators of oxidative stress of ‘Matador’ decreased, and the photosynthetic rate increased. This study highlights that low UV-B radiation acts as an eustress, by awaking positive changes in photosynthetic and oxidative stress parameters of spinach.
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Claims 7
Claim · model-written summary
UV-B stimulation emerged on day three after exposure.
- Taxon
- SPINACH
Spinacia oleraceat0 - Treatment
- UV-Be0
- Outcome
- stimulating effecte0
- Qualifier
- 3rd day after exposuree0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The stimulating effect of UV-B emerged on the 3rd day after exposure”
t0“SPINACH”
Claim · model-written summary
The positive UV-B response was more pronounced in Matador.
- Taxon
- SPINACHSpinacia oleraceat0
- Material
- ‘Matador’e0
- Outcome
- positive effect of UV-Be0
- Direction
- more pronouncede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The positive effect of UV-B was more pronounced for ‘Matador’”
t0“SPINACH”
Claim · model-written summary
DPPH radical-scavenging capacity peaked 24 hours after 2 kJ UV-B.
- Taxon
- SPINACHSpinacia oleraceat0
- Treatment
- 2 kJ UV-B exposuree0
- Outcome
- DPPH radical-scavenging capacitye0
- Direction
- higheste0
- Qualifier
- 24 hourse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest DPPH radical-scavenging capacity and the highest concentration of α-tocopherols were detected 24 hours after 2 kJ UV-B exposure”
t0“SPINACH”
Claim · model-written summary
α-tocopherol concentration peaked 24 hours after 2 kJ UV-B.
- Taxon
- SPINACHSpinacia oleraceat0
- Treatment
- 2 kJ UV-B exposuree0
- Outcome
- concentration of α-tocopherolse0
- Direction
- higheste0
- Qualifier
- 24 hourse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest DPPH radical-scavenging capacity and the highest concentration of α-tocopherols were detected 24 hours after 2 kJ UV-B exposure”
t0“SPINACH”
Claim · model-written summary
Photosynthetic rate had its greatest decrease 24 hours after 2 kJ UV-B.
- Taxon
- SPINACHSpinacia oleraceat0
- Treatment
- 2 kJ UV-B exposuree0
- Outcome
- photosynthetic ratee0
- Direction
- decreasee0
- Qualifier
- 24 hourse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest DPPH radical-scavenging capacity and the highest concentration of α-tocopherols were detected 24 hours after 2 kJ UV-B exposure, but the decrease in photosynthetic rate was the highest as well”
t0“SPINACH”
Claim · model-written summary
Matador oxidative stress indicators decreased on day three after 1 kJ UV-B.
- Taxon
- SPINACHSpinacia oleraceat0
- Material
- ‘Matador’e0
- Treatment
- 1 kJ UV-B exposuree0
- Outcome
- indicators of oxidative stresse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on the 3rd day after 1 kJ UV-B exposure, the indicators of oxidative stress of ‘Matador’ decreased”
t0“SPINACH”
Claim · model-written summary
Matador photosynthetic rate increased on day three after 1 kJ UV-B.
- Taxon
- SPINACHSpinacia oleraceat0
- Material
- ‘Matador’e0
- Treatment
- 1 kJ UV-B exposuree0
- Outcome
- photosynthetic ratee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on the 3rd day after 1 kJ UV-B exposure, the indicators of oxidative stress of ‘Matador’ decreased, and the photosynthetic rate increased”
t0“SPINACH”
The same questions in other papers
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See all 10 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.