Abstract
The relationship between cytokinin‐ and auxin‐induced stomatal opening and nitric oxide (NO) levels in guard cells in broad bean was studied. Results indicate that cytokinins and auxins reduced the levels of NO in guard cells and induced stomatal opening in darkness. In addition, cytokinins not only reduced NO levels in guard cells caused by sodium nitroprusside (SNP) in light but also abolished NO that had been generated by dark, and then promoted the closed stomata reopening, as did NO scavenger 2‐(4‐carboxyphenyl)‐4,4,5,5‐tetramethylimidazoline‐1‐oxyl‐3‐oxide. However, unlike cytokinins, auxins not only had incapability to reduce NO levels by SNP but also could not abolish NO having been generated by dark, so auxins could not promote the closed stomata to reopen. The above‐mentioned effects of auxins were similar to that of nitric oxide synthase (enzyme commission 1.14.13.39) inhibitor N G ‐nitro‐ l ‐Arg‐methyl ester. Hence, it is concluded that cytokinins reduced probably the levels of NO in guard cells via scavenging, and auxins reduced NO levels through restraining NO generation in all probability, and then induced stomatal opening in darkness.
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Claims 10
Claim · model-written summary
Cytokinins reduced guard cell NO in darkness.
- Taxon
- broad bean
Vicia fabat0 - Treatment
- cytokininse0
- Outcome
- levels of NO in guard cellse0
- Direction
- reducede0
- Qualifier
- in darknesse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cytokinins and auxins reduced the levels of NO in guard cells and induced stomatal opening in darkness”
t0“broad bean”
Claim · model-written summary
Auxins reduced guard cell NO in darkness.
- Taxon
- broad beanVicia fabat0
- Treatment
- auxinse0
- Outcome
- levels of NO in guard cellse0
- Direction
- reducede0
- Qualifier
- in darknesse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cytokinins and auxins reduced the levels of NO in guard cells and induced stomatal opening in darkness”
t0“broad bean”
Claim · model-written summary
Cytokinins induced stomatal opening in darkness.
- Taxon
- broad beanVicia fabat0
- Treatment
- cytokininse0
- Outcome
- stomatal openinge0
- Qualifier
- in darknesse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cytokinins and auxins reduced the levels of NO in guard cells and induced stomatal opening in darkness”
t0“broad bean”
Claim · model-written summary
Auxins induced stomatal opening in darkness.
- Taxon
- broad beanVicia fabat0
- Treatment
- auxinse0
- Outcome
- stomatal openinge0
- Qualifier
- in darknesse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cytokinins and auxins reduced the levels of NO in guard cells and induced stomatal opening in darkness”
t0“broad bean”
Claim · model-written summary
Cytokinins reduced SNP caused NO in light.
- Taxon
- broad beanVicia fabat0
- Treatment
- cytokininse0
- Outcome
- NO levels in guard cellse0
- Direction
- reducede0
- Qualifier
- caused by sodium nitroprusside (SNP) in lighte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cytokinins not only reduced NO levels in guard cells caused by sodium nitroprusside (SNP) in light”
t0“broad bean”
Claim · model-written summary
Cytokinins abolished darkness generated NO and promoted reopening of closed stomata.
- Taxon
- broad beanVicia fabat0
- Treatment
- cytokininse0
- Outcome
- closed stomata reopeninge0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cytokinins not only reduced NO levels in guard cells caused by sodium nitroprusside (SNP) in light but also abolished NO that had been generated by dark, and then promoted the closed stomata reopening”
t0“broad bean”
Claim · model-written summary
Auxins did not reduce SNP caused NO.
- Taxon
- broad beanVicia fabat0
- Treatment
- auxinse0
- Outcome
- NO levels by SNPe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“auxins not only had incapability to reduce NO levels by SNP”
t0“broad bean”
Claim · model-written summary
Auxins could not abolish darkness generated NO or reopen closed stomata.
- Taxon
- broad beanVicia fabat0
- Treatment
- auxinse0
- Outcome
- closed stomata to reopene0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“auxins could not promote the closed stomata to reopen”
t0“broad bean”
Claim · model-written summary
Authors infer cytokinins probably lower guard cell NO through scavenging.
- Taxon
- broad beanVicia fabat0
- Treatment
- cytokininse0
- Outcome
- levels of NO in guard cellse0
- Direction
- reducede0
- Qualifier
- via scavenginge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cytokinins reduced probably the levels of NO in guard cells via scavenging”
t0“broad bean”
Claim · model-written summary
Authors infer auxins probably lower NO by restraining its generation.
- Taxon
- broad beanVicia fabat0
- Treatment
- auxinse0
- Outcome
- NO levelse0
- Direction
- reducede0
- Qualifier
- through restraining NO generation in all probabilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“auxins reduced NO levels through restraining NO generation in all probability”
t0“broad bean”
The same questions in other papers
class · molecular: metabolites · Vicia faba (faba bean)Results agree
1 paper in the same direction as this paper
- positive
class · physiology: gas exchange · Vicia faba (faba bean)Results agree
1 paper in the same direction as this paper
- positive
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.