Abstract
Abiotic stresses such as drought and saline water impose major limitations on plant growth. Modulation of stomatal behavior may help plants cope with such stresses by reducing both water loss and salt uptake. Hexokinase (HXK) is a sugar-phosphorylating enzyme involved in guard cells' sugar-sensing, mediating stomatal closure and coordinating photosynthesis with transpiration. We generated transgenic tobacco lines expressing the Arabidopsis hexokinase1 (AtHXK1) under the guard cell-specific promoter KST1 and examined those plants using growth room and greenhouse experiments. The expression of AtHXK1 in tobacco guard cells reduced stomatal conductance and transpiration by about 25% with no negative effects on photosynthesis or growth, leading to increased water-use efficiency. In addition, these plants exhibited tolerance to drought and salt stress due to their lower transpiration rate, indicating that improved stomatal function has the potential to improve plant performance under stress conditions.
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Claims 4
Claim · model-written summary
Expressing AtHXK1 in tobacco guard cells reduced stomatal conductance and transpiration by about 25%.
- Taxon
- tobacco
Nicotiana tabacume0 - Material
- transgenic tobacco linese0
- Organ / stage
- guard cellse1
- Treatment
- expression of AtHXK1 in tobacco guard cellse1
- Gene
- AtHXK1e1
- Outcome
- stomatal conductance and transpiratione1
- Direction
- reducede1
- Value
- about 25%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We generated transgenic tobacco lines expressing the Arabidopsis hexokinase1 (AtHXK1) under the guard cell-specific promoter KST1”
e1“The expression of AtHXK1 in tobacco guard cells reduced stomatal conductance and transpiration by about 25% with no negative effects on photosynthesis or growth, leading to increased water-use efficiency”
Claim · model-written summary
Expressing AtHXK1 in tobacco guard cells had no negative effect on photosynthesis or growth.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- expression of AtHXK1 in tobacco guard cellse1
- Outcome
- photosynthesis or growthe1
- Direction
- no_changeinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We generated transgenic tobacco lines expressing the Arabidopsis hexokinase1 (AtHXK1) under the guard cell-specific promoter KST1”
e1“The expression of AtHXK1 in tobacco guard cells reduced stomatal conductance and transpiration by about 25% with no negative effects on photosynthesis or growth, leading to increased water-use efficiency”
Claim · model-written summary
Expressing AtHXK1 in tobacco guard cells increased water-use efficiency.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- expression of AtHXK1 in tobacco guard cellse1
- Outcome
- water-use efficiencye1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We generated transgenic tobacco lines expressing the Arabidopsis hexokinase1 (AtHXK1) under the guard cell-specific promoter KST1”
e1“The expression of AtHXK1 in tobacco guard cells reduced stomatal conductance and transpiration by about 25% with no negative effects on photosynthesis or growth, leading to increased water-use efficiency”
Claim · model-written summary
Transgenic tobacco expressing AtHXK1 in guard cells tolerated drought and salt stress because of lower transpiration.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- drought and salt stresse2
- Outcome
- tolerance to drought and salt stresse2
- Direction
- increaseinferrede2
- Qualifier
- due to their lower transpiration ratee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We generated transgenic tobacco lines expressing the Arabidopsis hexokinase1 (AtHXK1) under the guard cell-specific promoter KST1”
e2“these plants exhibited tolerance to drought and salt stress due to their lower transpiration rate”
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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.