Abstract
Abstract Sunflower (Helianthus annuus L.) was grown on liquid medium containing either nitrate, ammonium or ammonium + nitrate, with or without potassium. The growth of plants supplied with nitrate or ammonium + nitrate in the presence of potassium (5 mmol/l) was comparable. Plants grown on ammonium‐N only showed significantly lower growth. Dry matter and organic nitrogen content in plants supplied with ammonium + nitrate (total nitrogen 10 mmol/1) in the presence of potassium (5 mmol/l) was higher than in nitrate grown plants. Leaf protein pattern on sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS‐PAGE) was not affected by the nitrogen source provided in the medium. Potassium deficiency led to reduced growth, necrotic spots on the leaves and specific alterations in leaf protein pattern, expressed by an increase or decrease in several polypeptides. This was common to all the nitrogen forms tested. A most pronounced change was the increased expression of polypeptides of molecular weight 60 and 62 kilodaltons.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Plants grown on ammonium-N only grew significantly less than plants supplied nitrate or ammonium + nitrate with potassium
- Taxon
- Helianthus annuus
Helianthus annuuse0 - Treatment
- ammoniume2
- Outcome
- growthe2
- Direction
- lowere2
- Comparator
- nitrate or ammonium + nitrate in the presence of potassiume1
- Setting
- liquid mediume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sunflower (Helianthus annuus L.) was grown on liquid medium containing either nitrate, ammonium or ammonium + nitrate, with or without potassium”
e1“The growth of plants supplied with nitrate or ammonium + nitrate in the presence of potassium (5 mmol/l) was comparable”
e2“Plants grown on ammonium‐N only showed significantly lower growth”
Claim · model-written summary
Dry matter and organic nitrogen content were higher in plants supplied ammonium + nitrate with potassium than in nitrate-grown plants
- Taxon
- Helianthus annuusHelianthus annuuse0
- Treatment
- ammonium + nitratee3
- Outcome
- Dry matter and organic nitrogen contente3
- Direction
- highere3
- Comparator
- nitrate grown plantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sunflower (Helianthus annuus L.) was grown on liquid medium containing either nitrate, ammonium or ammonium + nitrate, with or without potassium”
e3“Dry matter and organic nitrogen content in plants supplied with ammonium + nitrate (total nitrogen 10 mmol/1) in the presence of potassium (5 mmol/l) was higher than in nitrate grown plants”
Claim · model-written summary
The leaf protein pattern on SDS-PAGE was not affected by the nitrogen source
- Taxon
- Helianthus annuusHelianthus annuuse0
- Organ / stage
- Leafe4
- Treatment
- nitrogen sourcee4
- Outcome
- protein patterne4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sunflower (Helianthus annuus L.) was grown on liquid medium containing either nitrate, ammonium or ammonium + nitrate, with or without potassium”
e4“Leaf protein pattern on sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS‐PAGE) was not affected by the nitrogen source provided in the medium”
Claim · model-written summary
Potassium deficiency reduced sunflower growth in the presence of potassium comparison
- Taxon
- Helianthus annuusHelianthus annuuse0
- Treatment
- Potassium deficiencye5
- Outcome
- growthe5
- Direction
- reducede5
- Comparator
- in the presence of potassiume1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sunflower (Helianthus annuus L.) was grown on liquid medium containing either nitrate, ammonium or ammonium + nitrate, with or without potassium”
e1“The growth of plants supplied with nitrate or ammonium + nitrate in the presence of potassium (5 mmol/l) was comparable”
e5“Potassium deficiency led to reduced growth, necrotic spots on the leaves and specific alterations in leaf protein pattern, expressed by an increase or decrease in several polypeptides”
Claim · model-written summary
Potassium deficiency caused necrotic spots on sunflower leaves
- Taxon
- Helianthus annuusHelianthus annuuse0
- Organ / stage
- leavese5
- Treatment
- Potassium deficiencye5
- Outcome
- necrotic spots on the leavese5
- Comparator
- in the presence of potassiume1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sunflower (Helianthus annuus L.) was grown on liquid medium containing either nitrate, ammonium or ammonium + nitrate, with or without potassium”
e1“The growth of plants supplied with nitrate or ammonium + nitrate in the presence of potassium (5 mmol/l) was comparable”
e5“Potassium deficiency led to reduced growth, necrotic spots on the leaves and specific alterations in leaf protein pattern, expressed by an increase or decrease in several polypeptides”
Claim · model-written summary
Potassium deficiency altered the leaf protein pattern, with increases or decreases in several polypeptides, a change common to all nitrogen forms tested
- Taxon
- Helianthus annuusHelianthus annuuse0
- Treatment
- Potassium deficiencye5
- Outcome
- leaf protein patterne5
- Direction
- increase or decreasee5
- Qualifier
- common to all the nitrogen forms testede6
- Comparator
- in the presence of potassiume1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sunflower (Helianthus annuus L.) was grown on liquid medium containing either nitrate, ammonium or ammonium + nitrate, with or without potassium”
e1“The growth of plants supplied with nitrate or ammonium + nitrate in the presence of potassium (5 mmol/l) was comparable”
e5“Potassium deficiency led to reduced growth, necrotic spots on the leaves and specific alterations in leaf protein pattern, expressed by an increase or decrease in several polypeptides”
e6“This was common to all the nitrogen forms tested”
Claim · model-written summary
Potassium deficiency most strongly increased the expression of polypeptides of 60 and 62 kilodaltons
- Taxon
- Helianthus annuusHelianthus annuuse0
- Treatment
- Potassium deficiencye5
- Outcome
- expression of polypeptides of molecular weight 60 and 62 kilodaltonse7
- Direction
- increasede7
- Qualifier
- most pronounced changee7
- Comparator
- in the presence of potassiume1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sunflower (Helianthus annuus L.) was grown on liquid medium containing either nitrate, ammonium or ammonium + nitrate, with or without potassium”
e1“The growth of plants supplied with nitrate or ammonium + nitrate in the presence of potassium (5 mmol/l) was comparable”
e5“Potassium deficiency led to reduced growth, necrotic spots on the leaves and specific alterations in leaf protein pattern, expressed by an increase or decrease in several polypeptides”
e7“A most pronounced change was the increased expression of polypeptides of molecular weight 60 and 62 kilodaltons”
Claim · model-written summary
Growth with ammonium + nitrate was comparable to growth with nitrate in the presence of potassium
- Taxon
- Helianthus annuusHelianthus annuuse0
- Treatment
- ammonium + nitratee1
- Outcome
- growthe1
- Direction
- no_changeinferrede1
- Comparator
- nitratee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sunflower (Helianthus annuus L.) was grown on liquid medium containing either nitrate, ammonium or ammonium + nitrate, with or without potassium”
e1“The growth of plants supplied with nitrate or ammonium + nitrate in the presence of potassium (5 mmol/l) was comparable”
The same questions in other papers
nitrogen · growth · Helianthus annuus (common sunflower)Results differ
62 papers in the same direction as this paper · 12 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- negative
- negative
72 papers more in this group
See all 76 papers →potassium · growth · Helianthus annuus (common sunflower)Positive and negative results
17 papers in the same direction as this paper · 3 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- negative
- no effect
- negative
17 papers more in this group
See all 21 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.