Abstract
Abstract Nitrogen (N) and potassium (K) are essential macronutrients for plants growth; however, the mechanism by which K mediates negative effects on ammonium-sensitive plants is still poorly understood. We hypothesized that K supplies may enhance antagonistic ammonium stress while improving nitrate nutrition function, which wheat seedlings were grown in sand culture in the presence of two N forms (ammonium; nitrate) supplied at two rates (2, 10 mmol L −1 ) and three K levels (0.5, 5, 15 mmol L −1 ). We found that a high N rate increased plant biomass under nitrate nutrition, while it had a negative effect under ammonium nutrition. Compared with nitrate, biomass was depressed by 54% or 85% for low or high N rate under ammonium. This resulted in a reduction in gas exchange parameters and a subsequent decrease in growth variables and nutrient uptake, whereas these parameters increased significantly with increasing K levels. Moreover, in principal components analysis, these variations were highly clustered under nitrate nutrition and highly separated under ammonium nutrition. Our study shows a clear positive interaction between K and N, suggesting that high K supply relieves ammonium stress while improving growth vigor under nitrate nutrition by enhancing nutrient uptake and assimilate production in wheat plants.
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Claims 7
Claim · model-written summary
High nitrogen increased wheat biomass with nitrate nutrition.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- a high N ratee0
- Outcome
- plant biomasse0
- Direction
- increasede0
- Qualifier
- under nitrate nutritione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a high N rate increased plant biomass under nitrate nutrition”
t0“wheat”
Claim · model-written summary
High nitrogen had a negative effect on wheat biomass with ammonium nutrition.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- a high N ratee0
- Outcome
- negative effecte0
- Direction
- negativee0
- Qualifier
- under ammonium nutritione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a high N rate increased plant biomass under nitrate nutrition, while it had a negative effect under ammonium nutrition”
t0“wheat”
Claim · model-written summary
At low nitrogen, ammonium depressed wheat biomass by 54% versus nitrate.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- ammoniume0
- Outcome
- biomasse0
- Direction
- depressede0
- Value
- 54%e0
- Qualifier
- low or high N ratee0
- Comparator
- nitratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with nitrate, biomass was depressed by 54% or 85% for low or high N rate under ammonium”
t0“wheat”
Claim · model-written summary
At high nitrogen, ammonium depressed wheat biomass by 85% versus nitrate.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- ammoniume0
- Outcome
- biomasse0
- Direction
- depressede0
- Value
- 85%e0
- Comparator
- nitratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with nitrate, biomass was depressed by 54% or 85% for low or high N rate under ammonium”
t0“wheat”
Claim · model-written summary
Ammonium nutrition reduced wheat gas exchange parameters, growth variables, and nutrient uptake.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- gas exchange parameters and a subsequent decrease in growth variables and nutrient uptakee0
- Direction
- reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a reduction in gas exchange parameters and a subsequent decrease in growth variables and nutrient uptake”
t0“wheat”
Claim · model-written summary
Increasing potassium significantly increased these wheat parameters.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- increasing K levelse0
- Outcome
- these parameterse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these parameters increased significantly with increasing K levels”
t0“wheat”
Claim · model-written summary
Principal components variations clustered under nitrate nutrition and separated under ammonium nutrition.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- these variationse0
- Qualifier
- under nitrate nutrition and highly separated under ammonium nutritione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these variations were highly clustered under nitrate nutrition and highly separated under ammonium nutrition”
t0“wheat”
The same questions in other papers
nitrogen · growth · Triticum aestivum (wheat)Positive and negative results
425 papers in the same direction as this paper · 116 in the opposite direction · 9 reporting no difference from an alternative
- negative
- positive
- positive
547 papers more in this group
See all 551 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.