Abstract
Using sodium nitroprusside (SNP) and 6-benzyl aminopurine (6-BA) as exogenous nitric oxide (NO) donor and a synthetic cytokinin, respectively, the study tried to characterize the roles and interaction of NO and cytokinin in the responses of wheat (Triticum aestivum L.) growth and photosynthesis to water deficit. The parameters such as biomass, roots growth, water status, membrane stability (MS), photosynthetic pigments and light response curves (LRCs) were measured in the study. SNP or 6-BA increased root elongation and leaf MS, however, 6-BA was a more potential regulator for stressed wheat. In addition, when both SNP and 6-BA were simultaneously added, their combined effects on the above indexes were more prominent than that of singly added SNP or 6-BA. In the chloroplasts of stressed wheat, SNP plus 6-BA increased the Chl a and Chl b contents and PSII functional activities described in LRCs-the opening (qP) and absorbed energy conversion (F v ’/F m ’) of PSII reaction centers, but failed to influence the carotenoid (Car) content. In the meantime, exogenous NO could regulate the LRCs although it exerted weaker influence on photosynthetic pigment level. However, NO inhibitor (hemoglobin, Hb) also arrested the promotion of 6-BA to the growth and development of the leaves and roots. Considering these results as a whole, NO could act as second messenger in cytokinin regulating growth and photosynthetic responses of wheat seedlings to water deficit.
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Claims 10
Claim · model-written summary
SNP or 6-BA increased root elongation and leaf membrane stability in water-stressed wheat seedlings.
- Taxon
- wheat seedlings
Triticum aestivumt0 - Treatment
- SNP or 6-BAe0
- Outcome
- root elongation and leaf MSe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SNP or 6-BA increased root elongation and leaf MS”
t0“wheat seedlings”
Claim · model-written summary
6-BA was a more potent regulator than SNP for stressed wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- 6-BAe0
- Outcome
- more potential regulatore0
- Direction
- more potentiale0
- Comparator
- SNPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SNP or 6-BA increased root elongation and leaf MS, however, 6-BA was a more potential regulator for stressed wheat”
Claim · model-written summary
Simultaneous addition of SNP and 6-BA had more prominent combined effects on the indexes than SNP or 6-BA added singly.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- both SNP and 6-BA were simultaneously addede0
- Outcome
- combined effects on the above indexese0
- Direction
- more prominente0
- Comparator
- singly added SNP or 6-BAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when both SNP and 6-BA were simultaneously added, their combined effects on the above indexes were more prominent than that of singly added SNP or 6-BA”
t0“wheat seedlings”
Claim · model-written summary
SNP plus 6-BA increased Chl a and Chl b contents in chloroplasts of stressed wheat.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- SNP plus 6-BAe0
- Outcome
- Chl a and Chl b contentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SNP plus 6-BA increased the Chl a and Chl b contents”
t0“wheat seedlings”
Claim · model-written summary
SNP plus 6-BA increased PSII functional activities (qP and Fv'/Fm') in stressed wheat.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- SNP plus 6-BAe0
- Outcome
- PSII functional activitiese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SNP plus 6-BA increased the Chl a and Chl b contents and PSII functional activities”
t0“wheat seedlings”
Claim · model-written summary
SNP plus 6-BA failed to influence the carotenoid content of stressed wheat.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- SNP plus 6-BAe0
- Outcome
- carotenoid (Car) contente1
- Direction
- failed to influencee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SNP plus 6-BA”
e1“failed to influence the carotenoid (Car) content”
t0“wheat seedlings”
Claim · model-written summary
Exogenous NO could regulate the light response curves of stressed wheat.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- exogenous NOe0
- Outcome
- LRCse0
- Direction
- regulatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous NO could regulate the LRCs although it exerted weaker influence on photosynthetic pigment level”
t0“wheat seedlings”
Claim · model-written summary
Exogenous NO exerted a weaker influence on photosynthetic pigment level.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- exogenous NOe0
- Outcome
- photosynthetic pigment levele0
- Direction
- weaker influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous NO could regulate the LRCs although it exerted weaker influence on photosynthetic pigment level”
t0“wheat seedlings”
Claim · model-written summary
The NO inhibitor hemoglobin arrested the promotion by 6-BA of leaf and root growth and development.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Organ / stage
- leaves and rootse0
- Treatment
- NO inhibitor (hemoglobin, Hb)e0
- Outcome
- promotion of 6-BA to the growth and developmente0
- Direction
- arrestede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NO inhibitor (hemoglobin, Hb) also arrested the promotion of 6-BA to the growth and development of the leaves and roots”
t0“wheat seedlings”
Claim · model-written summary
The authors conclude that NO could act as a second messenger in cytokinin regulation of growth and photosynthetic responses of wheat seedlings to water deficit.
- Taxon
- wheat seedlingsTriticum aestivume0
- Compound
- NOe0
- Outcome
- growth and photosynthetic responsese0
- Qualifier
- second messengere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NO could act as second messenger in cytokinin regulating growth and photosynthetic responses of wheat seedlings to water deficit”
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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.