Abstract
A full-length cDNA of dehydrin BcDh2 from Boea crassifolia and its antisense nucleotide sequence have been transferred into tobacco (Nicotiana tabacum) NC89 under the control of a caulifower mosaic virus 35S promoter. Under a progressive water stress, photosynthetic rate, transpiration rate and stomatal conductance of the sense and antisense plants reduced, and those of the control reduced much more. Photosynthetic rate, transpiration rate and stomatal conductance of all plants tested increased significantly 24 hours later after recoveried water supply, and those of the sense and antisense plants were higher than control. These indicated that overexpression of a dehydrin gene in tobacco may improve tolerance to water stress for plants, however, antisense BcDh2 gene in transgenic plant did not influence physiological conditions. The results of germination experiment of the transgenic seeds showed that on MS medium with different concentration PEG (8000), sense seed could more endure drought than control, while antisense seed was sensitive to drought. The results suggested that the overexpression of a dehydrin gene in tobacco might improve the tolerance to water stress for plants.
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Claims 7
Claim · model-written summary
Under progressive water stress, photosynthetic rate, transpiration rate and stomatal conductance of sense and antisense BcDh2 tobacco plants fell, but those of the control fell much more.
- Taxon
- tobacco
Nicotiana tabacume0 - Treatment
- progressive water stresse1
- Outcome
- photosynthetic rate, transpiration rate and stomatal conductancee1
- Direction
- reducede1
- Qualifier
- those of the control reduced much moree1
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tobacco (Nicotiana tabacum) NC89”
e1“Under a progressive water stress, photosynthetic rate, transpiration rate and stomatal conductance of the sense and antisense plants reduced, and those of the control reduced much more”
Claim · model-written summary
Photosynthetic rate, transpiration rate and stomatal conductance of all tested tobacco plants increased significantly 24 hours after water supply was restored.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- recoveried water supplye1
- Outcome
- Photosynthetic rate, transpiration rate and stomatal conductancee1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tobacco (Nicotiana tabacum) NC89”
e1“Photosynthetic rate, transpiration rate and stomatal conductance of all plants tested increased significantly 24 hours later after recoveried water supply, and those of the sense and antisense plants were higher than control”
Claim · model-written summary
After water recovery, photosynthetic rate, transpiration rate and stomatal conductance of sense and antisense plants were higher than those of the control.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- recoveried water supplye1
- Outcome
- Photosynthetic rate, transpiration rate and stomatal conductancee1
- Direction
- highere1
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tobacco (Nicotiana tabacum) NC89”
e1“Photosynthetic rate, transpiration rate and stomatal conductance of all plants tested increased significantly 24 hours later after recoveried water supply, and those of the sense and antisense plants were higher than control”
Claim · model-written summary
On MS medium with different PEG (8000) concentrations, sense BcDh2 transgenic tobacco seeds endured drought better than control seeds.
- Taxon
- tobaccoNicotiana tabacume0
- Organ / stage
- seede1
- Treatment
- different concentration PEG (8000)e1
- Outcome
- endure droughte1
- Direction
- more enduree1
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tobacco (Nicotiana tabacum) NC89”
e1“on MS medium with different concentration PEG (8000), sense seed could more endure drought than control”
Claim · model-written summary
Antisense BcDh2 transgenic tobacco seeds were sensitive to drought on PEG medium.
- Taxon
- tobaccoNicotiana tabacume0
- Organ / stage
- seede1
- Outcome
- sensitive to droughte1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tobacco (Nicotiana tabacum) NC89”
e1“antisense seed was sensitive to drought”
Claim · model-written summary
Antisense BcDh2 gene in transgenic tobacco did not influence physiological conditions.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- antisense BcDh2 genee1
- Outcome
- physiological conditionse1
- Direction
- did not influencee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tobacco (Nicotiana tabacum) NC89”
e1“antisense BcDh2 gene in transgenic plant did not influence physiological conditions”
Claim · model-written summary
The authors conclude that overexpression of a dehydrin gene in tobacco may improve tolerance to water stress.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- overexpression of a dehydrin genee0
- Outcome
- tolerance to water stresse0
- Direction
- improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“overexpression of a dehydrin gene in tobacco may improve tolerance to water stress for plants”
The same questions in other papers
irrigation · physiology: photosynthesis · Nicotiana tabacum (tobacco)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
1 paper more in this group
See all 5 papers →drought · physiology: photosynthesis · Nicotiana tabacum (tobacco)Positive and negative results
25 in the opposite direction
- negative
- negative
- negative
22 papers more in this group
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.