Abstract
Photosystem II (PSII) is extremely sensitive to drought and high light stress, both of which are expected to increase under changing climate conditions. We studied two soybean cultivars, JS335 and Kalitur, under drought stress, high radiation, and their combination. Chlorophyll fluorescence indicated decline in quantum yield with increasing light intensity and duration, particularly beyond 900 µmol photons m⁻²s⁻¹. JS335 showed better recovery from photodamage compared to Kalitur. The combined drought and high radiation treatment reduced chlorophyll content and relative water content with increased malondialdehyde (MDA) and hydrogen peroxide (H₂O₂) after 15 days. Antioxidant enzymes responded dynamically, with a gradual increase in catalase activity from day 3 and ascorbate peroxidase reaching its maximum on day 9. These results indicate that combined stress enhanced damage to PSII, while greater antioxidant defense and effective Reactive Oxygen Species (ROS) management in JS335 form the basis of its superior tolerance, providing worthwhile characteristics for improving soybeans under stressful conditions.
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Claims 8
Claim · model-written summary
JS335 showed better recovery from photodamage than Kalitur.
- Taxon
- soybean
Glycine maxt0 - Material
- JS335e0
- Outcome
- recovery from photodamagee0
- Direction
- bettere0
- Comparator
- Kaliture0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in soybean (Glycine max L.)”
e0“JS335 showed better recovery from photodamage compared to Kalitur”
Claim · model-written summary
Quantum yield declined with increasing light intensity and duration, particularly beyond 900 µmol photons m⁻²s⁻¹.
- Taxon
- soybeanGlycine maxt0
- Treatment
- increasing light intensity and duratione1
- Outcome
- quantum yielde1
- Direction
- declinee1
- Value
- 900 µmol photons m⁻²s⁻¹e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in soybean (Glycine max L.)”
e1“Chlorophyll fluorescence indicated decline in quantum yield with increasing light intensity and duration, particularly beyond 900 µmol photons m⁻²s⁻¹”
Claim · model-written summary
Combined drought and high radiation reduced chlorophyll content and relative water content.
- Taxon
- soybeanGlycine maxt0
- Treatment
- combined drought and high radiation treatmente2
- Outcome
- chlorophyll content and relative water contente2
- Direction
- reducede2
- Qualifier
- after 15 dayse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in soybean (Glycine max L.)”
e2“The combined drought and high radiation treatment reduced chlorophyll content and relative water content with increased malondialdehyde (MDA) and hydrogen peroxide (H₂O₂) after 15 days”
Claim · model-written summary
Combined drought and high radiation increased malondialdehyde and hydrogen peroxide after 15 days.
- Taxon
- soybeanGlycine maxt0
- Treatment
- combined drought and high radiation treatmente2
- Outcome
- malondialdehyde (MDA) and hydrogen peroxide (H₂O₂)e2
- Direction
- increasede2
- Qualifier
- after 15 dayse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in soybean (Glycine max L.)”
e2“The combined drought and high radiation treatment reduced chlorophyll content and relative water content with increased malondialdehyde (MDA) and hydrogen peroxide (H₂O₂) after 15 days”
Claim · model-written summary
Catalase activity increased gradually from day 3.
- Taxon
- soybeanGlycine maxt0
- Outcome
- catalase activitye3
- Direction
- increasee3
- Qualifier
- from day 3e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in soybean (Glycine max L.)”
e3“a gradual increase in catalase activity from day 3”
Claim · model-written summary
Ascorbate peroxidase reached its maximum on day 9.
- Taxon
- soybeanGlycine maxt0
- Outcome
- ascorbate peroxidasee4
- Direction
- maximume4
- Value
- day 9e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in soybean (Glycine max L.)”
e4“ascorbate peroxidase reaching its maximum on day 9”
Claim · model-written summary
Greater antioxidant defense and effective ROS management in JS335 form the basis of its superior tolerance.
- Taxon
- soybeanGlycine maxt0
- Material
- JS335e5
- Outcome
- tolerancee5
- Qualifier
- greater antioxidant defense and effective Reactive Oxygen Species (ROS) managemente5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in soybean (Glycine max L.)”
e5“greater antioxidant defense and effective Reactive Oxygen Species (ROS) management in JS335 form the basis of its superior tolerance”
Claim · model-written summary
Combined stress enhanced damage to photosystem II.
- Taxon
- soybeanGlycine maxt0
- Treatment
- combined stresse6
- Outcome
- damage to PSIIe6
- Direction
- enhancede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in soybean (Glycine max L.)”
e6“These results indicate that combined stress enhanced damage to PSII”
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