Abstract
Shoot and root mass of tobacco plants treated with only 0.05 µM boron was decreased by 25 and 50 %, respectively, when compared to plants sufficiently supplied with B (2 and 5 µM). Leaf B content of 0.05 µM B-treated plants decreased (about 80-90 %) when compared to 2 µM B treated plants; this drop of B content were not as marked (about 25-45 %) in roots. Leaf and root nitrate contents in B-deficient plants were 45-60 % and 35-45 % lower, respectively, than those from 2 and 5 µM B treated plants. It is suggested that B deficiency might decrease nitrate uptake rather than nitrate reductase activity in tobacco plants.
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Claims 7
Claim · model-written summary
Low boron reduced tobacco shoot mass by 25% versus sufficient boron.
- Taxon
- tobacco plants
Nicotiana tabacumt0 - Treatment
- 0.05 µM borone0
- Outcome
- Shoot and root masse0
- Direction
- decreasede0
- Value
- 25 and 50 %e0
- Comparator
- plants sufficiently supplied with B (2 and 5 µM)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tobacco plants”
e0“Shoot and root mass of tobacco plants treated with only 0.05 µM boron was decreased by 25 and 50 %, respectively, when compared to plants sufficiently supplied with B (2 and 5 µM).”
Claim · model-written summary
Low boron reduced root mass by 50%.
- Taxon
- tobacco plantsNicotiana tabacume0
- Treatment
- 0.05 µM borone0
- Outcome
- root masse0
- Direction
- decreasede0
- Value
- 50 %e0
- Comparator
- plants sufficiently supplied with B (2 and 5 µM)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot and root mass of tobacco plants treated with only 0.05 µM boron was decreased by 25 and 50 %, respectively, when compared to plants sufficiently supplied with B (2 and 5 µM).”
Claim · model-written summary
Low boron reduced leaf boron content by about 80–90%.
- Taxon
- tobacco plantsNicotiana tabacumt0
- Treatment
- 0.05 µM B-treatede0
- Outcome
- Leaf B contente0
- Direction
- decreasede0
- Value
- about 80-90 %e0
- Comparator
- 2 µM B treated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tobacco plants”
e0“Leaf B content of 0.05 µM B-treated plants decreased (about 80-90 %) when compared to 2 µM B treated plants”
Claim · model-written summary
Low boron reduced root boron content by about 25–45%.
- Taxon
- tobacco plantsNicotiana tabacumt0
- Organ / stage
- rootse0
- Treatment
- 0.05 µM B-treatede1
- Outcome
- B contente0
- Direction
- drope0
- Value
- about 25-45 %e0
- Comparator
- 2 µM B treated plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tobacco plants”
e0“this drop of B content were not as marked (about 25-45 %) in roots”
e1“Leaf B content of 0.05 µM B-treated plants decreased (about 80-90 %) when compared to 2 µM B treated plants”
Claim · model-written summary
B deficient plants had 45–60% lower leaf nitrate.
- Taxon
- tobacco plantsNicotiana tabacumt0
- Treatment
- B-deficient plantse0
- Outcome
- Leaf and root nitrate contentse0
- Direction
- lowere0
- Value
- 45-60 %e0
- Comparator
- 2 and 5 µM B treated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tobacco plants”
e0“Leaf and root nitrate contents in B-deficient plants were 45-60 % and 35-45 % lower, respectively, than those from 2 and 5 µM B treated plants.”
Claim · model-written summary
B deficient plants had 35–45% lower root nitrate.
- Taxon
- tobacco plantsNicotiana tabacumt0
- Treatment
- B-deficient plantse0
- Outcome
- root nitrate contentse0
- Direction
- lowere0
- Value
- 35-45 %e0
- Comparator
- 2 and 5 µM B treated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tobacco plants”
e0“Leaf and root nitrate contents in B-deficient plants were 45-60 % and 35-45 % lower, respectively, than those from 2 and 5 µM B treated plants.”
Claim · model-written summary
Authors suggest boron deficiency may decrease nitrate uptake rather than nitrate reductase activity.
- Taxon
- tobacco plantsNicotiana tabacume0
- Treatment
- B deficiencye0
- Outcome
- nitrate uptakee0
- Direction
- decreasee0
- Qualifier
- rather than nitrate reductase activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is suggested that B deficiency might decrease nitrate uptake rather than nitrate reductase activity in tobacco plants.”
The same questions in other papers
boron atom · growth · Nicotiana tabacum (tobacco)Positive and negative results
3 papers in the same direction as this paper · 13 in the opposite direction
- positive
- positive
- positive
13 papers more in this group
See all 17 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.