Abstract
In this study, water solutions with different concentrations of abscisic acid (ABA) (10, 20, and 40 μmol L-1) were sprayed on leaves of drought-stressed tobacco seedlings. The results showed that under drought stress, both water content and photosynthetic carbon assimilation ability were reduced, PSII activity was also inhibited. Drought stress also led to the outbreak of reactive oxygen species in tobacco leaves and increased the degree of membrane peroxidation. However, spraying exogenous ABA significantly alleviated the damage caused by drought stress on the leaves. The potential mechanisms by which drought resistance in tobacco is improved by spraying exogenous ABA include: (1) regulation of the stomatal limitation of leaves, which is beneficial to water retention ability and can enhance photosynthetic function; (2) reduction of the energy pressure of the PSII reaction center by increasing nonphotochemical quenching (NPQ); and (3) effective reduction of the production of reactive oxygen species in the leaves and reducing the degree of membrane peroxidation.
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Claims 7
Claim · model-written summary
Drought reduced leaf water content and carbon assimilation.
- Taxon
- tobacco
Nicotiana tabacumt0 - Treatment
- drought stresse0
- Outcome
- water content and photosynthetic carbon assimilation abilitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under drought stress, both water content and photosynthetic carbon assimilation ability were reduced”
t0“tobacco”
Claim · model-written summary
Drought inhibited PSII activity.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- drought stresst0
- Outcome
- PSII activitye0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PSII activity was also inhibited.”
t0“tobacco leaves under drought stress”
Claim · model-written summary
Drought increased reactive oxygen species and membrane peroxidation.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- Drought stresse0
- Outcome
- reactive oxygen species in tobacco leaves and increased the degree of membrane peroxidatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress also led to the outbreak of reactive oxygen species in tobacco leaves and increased the degree of membrane peroxidation.”
Claim · model-written summary
Exogenous ABA significantly alleviated drought leaf damage.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- spraying exogenous ABAe0
- Outcome
- damage caused by drought stress on the leavese0
- Direction
- alleviatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spraying exogenous ABA significantly alleviated the damage caused by drought stress on the leaves.”
t0“tobacco”
Claim · model-written summary
ABA-regulated stomatal limitation may improve water retention and photosynthetic function.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- water retention ability and can enhance photosynthetic functione0
- Qualifier
- regulation of the stomatal limitation of leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“regulation of the stomatal limitation of leaves, which is beneficial to water retention ability and can enhance photosynthetic function”
t0“tobacco”
Claim · model-written summary
ABA may reduce PSII energy pressure by increasing nonphotochemical quenching.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- energy pressure of the PSII reaction centere0
- Qualifier
- increasing nonphotochemical quenching (NPQ)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduction of the energy pressure of the PSII reaction center by increasing nonphotochemical quenching (NPQ)”
t0“tobacco”
Claim · model-written summary
ABA may reduce reactive oxygen species production and membrane peroxidation.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- exogenous abscisic acidt0
- Outcome
- production of reactive oxygen species in the leaves and reducing the degree of membrane peroxidatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effective reduction of the production of reactive oxygen species in the leaves and reducing the degree of membrane peroxidation.”
t0“exogenous abscisic acid on the photosynthetic function and reactive oxygen species metabolism of tobacco”
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See all 26 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.