Abstract
Both drought stress and exogenous selenium (Se) cause changes in plant physiological characteristics, which are key factors affecting crop yield. Although Se is known to be drought-resistant for crops, its internal physiological regulatory mechanisms are not clear. This study analyzed the effects of selenium application (SeA) on antioxidant enzyme activities, osmoregulatory substance contents, and photosynthetic characteristics of greenhouse tomatoes under drought stress and related physiological mechanisms. The results showed that drought stress induced oxidative damage in cells and significantly increased the content of the membrane lipidation product malondialdehyde (MDA) and the osmoregulatory substance proline (p < 0.001) compared with the adequate water supply. The proline content of severe drought stress (W1) was 9.7 times higher than that of the adequate water supply (W3), and foliar SeA increased glutathione peroxidase (GSH-PX) activity, and SeA induced different enzymatic reactions in cells under different drought stresses; catalase (CAT) was induced under severe drought stress (p < 0.01) and was significantly increased by 32.1% compared with the clear water control, CAT. Peroxidase (POD) was induced under adequate water supply conditions (p < 0.01), which was significantly increased by 15.2%, and SeA attenuated cell membrane lipidation, which reduced MDA content by an average of 21.5% compared with the clear water control, and also promoted photosynthesis in the crop. Meanwhile, through the entropy weighting method analysis (TOPSIS) of the indexes, the highest comprehensive evaluation score was obtained for the S5W3, followed by the S2.5W3 treatment. Therefore, this study emphasized the importance of SeA to reduce oxidative damage and enhance photosynthesis under drought stress.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Drought stress significantly increased malondialdehyde (MDA) content in greenhouse tomato compared with adequate water supply.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- drought stresse1
- Outcome
- malondialdehyde (MDA)e1
- Direction
- increasede1
- Comparator
- adequate water supplye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Greenhouse Tomato under Drought Stress”
e1“drought stress induced oxidative damage in cells and significantly increased the content of the membrane lipidation product malondialdehyde (MDA) and the osmoregulatory substance proline (p < 0.001) compared with the adequate water supply”
Claim · model-written summary
Severe drought stress raised proline content of greenhouse tomato 9.7 times above adequate water supply.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- severe drought stress (W1)e2
- Outcome
- proline contente2
- Direction
- highere2
- Value
- 9.7 timese2
- Comparator
- adequate water supply (W3)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Greenhouse Tomato under Drought Stress”
e2“The proline content of severe drought stress (W1) was 9.7 times higher than that of the adequate water supply (W3)”
Claim · model-written summary
Foliar selenium application increased glutathione peroxidase (GSH-PX) activity in greenhouse tomato.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- foliar SeAe3
- Gene
- glutathione peroxidase (GSH-PX)e3
- Outcome
- glutathione peroxidase (GSH-PX) activitye3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Greenhouse Tomato under Drought Stress”
e3“foliar SeA increased glutathione peroxidase (GSH-PX) activity”
Claim · model-written summary
Catalase activity was significantly increased by 32.1% under severe drought stress compared with the clear water control.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- severe drought stresse4
- Gene
- catalase (CAT)e4
- Outcome
- catalase (CAT)e4
- Direction
- increasede4
- Value
- 32.1%e4
- Comparator
- clear water controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Greenhouse Tomato under Drought Stress”
e4“catalase (CAT) was induced under severe drought stress (p < 0.01) and was significantly increased by 32.1% compared with the clear water control, CAT”
Claim · model-written summary
Peroxidase activity was significantly increased by 15.2% under adequate water supply with selenium application.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- adequate water supplye5
- Gene
- Peroxidase (POD)e5
- Outcome
- Peroxidase (POD)e5
- Direction
- increasede5
- Value
- 15.2%e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Greenhouse Tomato under Drought Stress”
e5“Peroxidase (POD) was induced under adequate water supply conditions (p < 0.01), which was significantly increased by 15.2%”
Claim · model-written summary
Selenium application reduced MDA content by 21.5% compared with the clear water control.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- SeAe6
- Outcome
- MDA contente6
- Direction
- reducede6
- Value
- 21.5%e6
- Comparator
- clear water controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Greenhouse Tomato under Drought Stress”
e6“SeA attenuated cell membrane lipidation, which reduced MDA content by an average of 21.5% compared with the clear water control”
Claim · model-written summary
Selenium application promoted photosynthesis in greenhouse tomato.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- SeAe0
- Outcome
- photosynthesise7
- Direction
- promotede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Greenhouse Tomato under Drought Stress”
e0“selenium application (SeA)”
e7“also promoted photosynthesis in the crop”
Claim · model-written summary
The S5W3 treatment obtained the highest comprehensive evaluation score, followed by S2.5W3.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- S5W3e1
- Outcome
- comprehensive evaluation scoree1
- Direction
- higheste1
- Comparator
- S2.5W3 treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Greenhouse Tomato under Drought Stress”
e1“the highest comprehensive evaluation score was obtained for the S5W3, followed by the S2.5W3 treatment”
The same questions in other papers
selenium atom · physiology: oxidative · Solanum lycopersicum (tomato)Positive and negative results
4 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
2 papers more in this group
See all 6 papers →selenium atom · physiology: antioxidant enzymes · Solanum lycopersicum (tomato)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →selenium atom · physiology: photosynthesis · Solanum lycopersicum (tomato)Results agree
10 papers in the same direction as this paper
- positive
- positive
- positive
7 papers more in this group
See all 11 papers →drought · physiology: antioxidant enzymes · Solanum lycopersicum (tomato)Results differ
14 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
13 papers more in this group
See all 17 papers →drought · physiology: oxidative · Solanum lycopersicum (tomato)Results differ
30 papers in the same direction as this paper · 9 in the opposite direction
- positive
- positive
- positive
36 papers more in this group
See all 40 papers →irrigation · physiology: antioxidant enzymes · Solanum lycopersicum (tomato)Positive and negative results
6 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
4 papers more in this group
See all 8 papers →application · physiology: antioxidant enzymes · Solanum lycopersicum (tomato)Positive and negative results
34 papers in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- negative
36 papers more in this group
See all 40 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.