Abstract
The effects of selenium sprayed to tobacco leaves on growth and biomass, chlorophyll a, chlorophyll b, chlorophyll a+b, carotenoid, the peroxidase activity (POD), superoxide dismutase activity (SOD) and contents of malondialdehyde (MDA) of tobacco were studied through pot experiment. The results indicated that an appropriate amount of selenium contributed to growth of overground and underground parts. Moreover, chlorophyll and carotenoid increased after spraying right amount of selenium, the effect being obvious in a short time. POD activity of tobacco was not transformed obviously after selenium spraying , while the effect was gradually more and more obvious with the extension of time. Action of selenium to SOD was visible in short term, but weakened with the extension of time. MDA in tobacco leaves accumulated obviously after selenium spraying and was unaffected on growth season. The content of selenium in the flue-cured tobacco leaves increased with the concentration of spraying, and the effect of spraying in the prometaphase was evidently better than in the prophase.
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Claims 7
Claim · model-written summary
An appropriate selenium amount promoted aboveground and belowground growth.
- Taxon
- tobacco
Nicotiana tabacumt0 - Treatment
- an appropriate amount of seleniume0
- Outcome
- growth of overground and underground partse0
- Direction
- contributede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an appropriate amount of selenium contributed to growth of overground and underground parts”
t0“tobacco”
Claim · model-written summary
A suitable selenium spray amount increased chlorophyll and carotenoid in the short term.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- spraying right amount of seleniume0
- Outcome
- chlorophyll and carotenoide0
- Direction
- increasede0
- Qualifier
- obvious in a short timee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorophyll and carotenoid increased after spraying right amount of selenium, the effect being obvious in a short time”
t0“tobacco”
Claim · model-written summary
Tobacco POD activity showed little immediate change after selenium spraying but a growing effect over time.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- selenium sprayinge0
- Outcome
- POD activitye0
- Qualifier
- gradually more and more obvious with the extension of timee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POD activity of tobacco was not transformed obviously after selenium spraying , while the effect was gradually more and more obvious with the extension of time”
Claim · model-written summary
Selenium affected SOD activity in the short term, with the effect weakening over time.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- seleniume0
- Outcome
- SODe0
- Direction
- weakenede0
- Qualifier
- with the extension of timee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Action of selenium to SOD was visible in short term, but weakened with the extension of time”
t0“tobacco”
Claim · model-written summary
Selenium spraying markedly increased MDA accumulation in tobacco leaves across the growth season.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- selenium sprayinge0
- Outcome
- MDA in tobacco leavese0
- Direction
- accumulatede0
- Qualifier
- unaffected on growth seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MDA in tobacco leaves accumulated obviously after selenium spraying and was unaffected on growth season”
Claim · model-written summary
Leaf selenium content rose with selenium spray concentration.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- concentration of sprayinge0
- Outcome
- content of selenium in the flue-cured tobacco leavese0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The content of selenium in the flue-cured tobacco leaves increased with the concentration of spraying”
Claim · model-written summary
Selenium spraying in the prometaphase had a stronger effect on leaf selenium content than spraying in the prophase.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- spraying in the prometaphasee0
- Outcome
- effect of sprayinge0
- Direction
- bettere0
- Comparator
- in the prophasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect of spraying in the prometaphase was evidently better than in the prophase”
t0“tobacco”
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