Abstract
Using bean seedlings, the effects of benzyladenine (BA) on stomatal conductance (gs), transpiration rate (E), and net photosynthetic rate (PN) were examined in order to find out dose and time responses. In bean seedlings, BA appli roots in concentrations of 1, 5, 10, and 20 µM increased gs and PN of leaves already 1 h after application. E was not markedly affected and water use efficiency (WUE) was increased. However, the effects were mostly transient and after 24 h PN only at 1 and 5 µM BA was increased, and other parameters were not affected or even decreased. In sugar beet seedlings, the effects of hydroxybenzyladenosine (HBA) in addition to those of BA on the same parameters were determined. The both cytokinins were applied in 1, 5, 10, and 20 µM concentrations either to roots or sprayed on leaves However, the effects were inconsistent and the positive effect was observed only after 24 h on PN in plants with roots immersed in 5 and 10 µM BA, or 10 µM HBA, and on E in plants sprayed with 5 µM BA or 10 µM HBA. Thus the stimulation of gas exchange by exogenously applied cytokinins is rather exceptional than general.
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Claims 9
Claim · model-written summary
Root-applied BA increased bean leaf stomatal conductance and net photosynthetic rate after one hour.
- Taxon
- beane0
- Treatment
- BA appli roots in concentrations of 1, 5, 10, and 20 µMe0
- Outcome
- gs and PNe0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“In bean seedlings, BA appli roots in concentrations of 1, 5, 10, and 20 µM increased gs and PN of leaves already 1 h after application.”
Claim · model-written summary
Bean transpiration was not markedly affected initially by BA.
Not reportedTreatmentComparator
Verbatim
e0“E was not markedly affected”
t0“Bean”
Claim · model-written summary
Bean water use efficiency increased after BA treatment.
Not reportedTreatmentComparator
Verbatim
e0“water use efficiency (WUE) was increased”
t0“Bean”
Claim · model-written summary
After 24 hours, bean photosynthetic rate was increased only with 1 and 5 µM BA.
Not reportedComparator
Verbatim
e0“after 24 h PN only at 1 and 5 µM BA was increased”
t0“Bean”
Claim · model-written summary
At 24 hours, other bean gas exchange parameters were unchanged or decreased.
Not reportedTreatmentComparator
Verbatim
e0“other parameters were not affected or even decreased”
t0“Bean”
Claim · model-written summary
Sugar beet net photosynthesis increased after 24 hours when roots were immersed in 5 or 10 µM BA.
- Taxon
- Sugar Beet
Beta vulgaris subsp. vulgarist0 - Treatment
- roots immersed in 5 and 10 µM BAe0
- Outcome
- PNe0
- Direction
- positive effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“positive effect was observed only after 24 h on PN in plants with roots immersed in 5 and 10 µM BA”
t0“Sugar Beet”
Claim · model-written summary
Sugar beet net photosynthesis increased after 24 hours with root immersion in 10 µM HBA.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- 10 µM HBAe0
- Outcome
- PNe0
- Direction
- positive effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“positive effect was observed only after 24 h on PN in plants with roots immersed in 5 and 10 µM BA, or 10 µM HBA”
t0“Sugar Beet”
Claim · model-written summary
Sugar beet transpiration increased after 24 hours following a 5 µM BA spray.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- sprayed with 5 µM BAe0
- Outcome
- Ee0
- Direction
- positive effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“positive effect was observed only after 24 h on PN in plants with roots immersed in 5 and 10 µM BA, or 10 µM HBA, and on E in plants sprayed with 5 µM BA or 10 µM HBA”
t0“Sugar Beet”
Claim · model-written summary
Sugar beet transpiration increased after 24 hours following a 10 µM HBA spray.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- 10 µM HBAe0
- Outcome
- Ee0
- Direction
- positive effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“positive effect was observed only after 24 h on PN in plants with roots immersed in 5 and 10 µM BA, or 10 µM HBA, and on E in plants sprayed with 5 µM BA or 10 µM HBA”
t0“Sugar Beet”
The same questions in other papers
N-benzyladenine · physiology: photosynthesis · Phaseolus vulgaris (common bean)Positive and negative results
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- positive
- positive
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3 papers more in this group
See all 7 papers →N-benzyladenine · physiology: photosynthesis · Beta vulgaris (beet)Results agree
2 papers in the same direction as this paper
- positive
- 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.