Abstract
Abstract The effect of various boron levels in the nutrient solution on the growth, boron and chlorophyll content, photosynthesis and chlorophyll fluorescence in the leaves of young sunflower (Helianthus annuus L.) plants was studied under greenhouse conditions. Deficiency of boron decreased the dry matter yield of the roots, shoots and leaves. The content of boron in all analyzed plant parts increased with the increase of boron levels in the nutrient solution, more so in the shoots than in the roots. Leaf area was reduced under boron deficiency as well as the content of chlorophyll in the leaves. The content of analyzed sugars was increased in boron deficient plants, glucose content exhibited the highest increase under boron deficiency. Boron deficiency appreciably decreased photosynthetic oxygen evolution by leaves, the apparent quantum yield and quantum efficiency of photosystem two electron transport. The diminished rate of photosynthesis in boron deficient sunflower leaves could be correlated to the diminished efficiency of electron transport and to the increased content of sugars in the leaves.
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Claims 11
Claim · model-written summary
dry matter yield of the roots, shoots and leaves changed under boron treatment.
- Taxon
- sunflower
Helianthus annuust0 - Treatment
- Deficiency of borone0
- Outcome
- dry matter yield of the roots, shoots and leavese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Deficiency of boron decreased the dry matter yield of the roots, shoots and leaves.”
t0“sunflower”
Claim · model-written summary
content of boron in all analyzed plant parts changed under boron treatment.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- increase of boron levels in the nutrient solutione0
- Outcome
- content of boron in all analyzed plant partse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The content of boron in all analyzed plant parts increased with the increase of boron levels in the nutrient solution, more so in the shoots than in the roots.”
t0“sunflower”
Claim · model-written summary
Leaf area changed under boron treatment.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- boron deficiencye0
- Outcome
- Leaf areae0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf area was reduced under boron deficiency as well as the content of chlorophyll in the leaves.”
t0“sunflower”
Claim · model-written summary
content of chlorophyll in the leaves changed under boron treatment.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- boron deficiencye0
- Outcome
- content of chlorophyll in the leavese0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf area was reduced under boron deficiency as well as the content of chlorophyll in the leaves.”
t0“sunflower”
Claim · model-written summary
content of analyzed sugars changed under boron treatment.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- boron deficiente0
- Outcome
- content of analyzed sugarse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The content of analyzed sugars was increased in boron deficient plants, glucose content exhibited the highest increase under boron deficiency.”
t0“sunflower”
Claim · model-written summary
glucose content changed under boron treatment.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- boron deficiencye0
- Outcome
- glucose contente0
- Direction
- highest increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The content of analyzed sugars was increased in boron deficient plants, glucose content exhibited the highest increase under boron deficiency.”
t0“sunflower”
Claim · model-written summary
photosynthetic oxygen evolution by leaves changed under boron treatment.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- Boron deficiencye0
- Outcome
- photosynthetic oxygen evolution by leavese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Boron deficiency appreciably decreased photosynthetic oxygen evolution by leaves, the apparent quantum yield and quantum efficiency of photosystem two electron transport.”
t0“sunflower”
Claim · model-written summary
apparent quantum yield changed under boron treatment.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- Boron deficiencye0
- Outcome
- apparent quantum yielde0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Boron deficiency appreciably decreased photosynthetic oxygen evolution by leaves, the apparent quantum yield and quantum efficiency of photosystem two electron transport.”
t0“sunflower”
Claim · model-written summary
quantum efficiency of photosystem two electron transport changed under boron treatment.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- Boron deficiencye0
- Outcome
- quantum efficiency of photosystem two electron transporte0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Boron deficiency appreciably decreased photosynthetic oxygen evolution by leaves, the apparent quantum yield and quantum efficiency of photosystem two electron transport.”
t0“sunflower”
Claim · model-written summary
The diminished photosynthesis rate could be correlated with diminished electron transport efficiency.
- Taxon
- sunflowerHelianthus annuuse0
- Organ / stage
- leavese0
- Outcome
- rate of photosynthesise0
- Direction
- diminishede0
- Qualifier
- diminished efficiency of electron transporte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The diminished rate of photosynthesis in boron deficient sunflower leaves could be correlated to the diminished efficiency of electron transport and to the increased content of sugars in the leaves.”
Claim · model-written summary
The diminished photosynthesis rate could be correlated with increased leaf sugar content.
- Taxon
- sunflowerHelianthus annuuse0
- Organ / stage
- leavese0
- Compound
- sugarse0
- Outcome
- rate of photosynthesise0
- Direction
- diminishede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The diminished rate of photosynthesis in boron deficient sunflower leaves could be correlated to the diminished efficiency of electron transport and to the increased content of sugars in the leaves.”
The same questions in other papers
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This paper is about lacking the nutrient, so it counts the other way round here.
- negative
- positive
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boron atom · growth · Helianthus annuus (common sunflower)Results differ
32 papers in the same direction as this paper · 5 in the opposite direction · 1 reporting no difference from an alternative
This paper is about lacking the nutrient, so it counts the other way round here.
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- positive
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4 papers in the same direction as this paper · 2 in the opposite direction · 1 reporting no difference from an alternative
- no effect
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This paper is about lacking the nutrient, so it counts the other way round here.
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fertilization · molecular: metabolites · Helianthus annuus (common sunflower)Positive and negative results
19 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
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See all 22 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.