Abstract
Nitrate assimilation was examined in two cultivars (Banner Winter and Herz Freya) of Vicia faba L. supplied with a range of nitrate concentrations. The distribution between root and shoot was assessed. The cultivars showed responses to increased applied nitrate concentration. Total plant dry weight and carbon content remained constant while shoot: root dry weight ratio, total plant nitrogen, total plant leaf area and specific leaf area (SLA) all increased. The proportion of total plant nitrate and nitrate reductase (NR) activity found in the shoot of both cultivars increased with applied nitrate concentrations as did NO3−: Kjeldahl-N ratios of xylem sap. The cultivars differed in that a greater proportion of total plant NR activity occurred in the shoot of cv. Herz Freya at all applied nitrate concentrations, and its xylem sap NO3−: Kjeldahl-N ratio and SLA were consistently greater. It is concluded that the distribution of nitrate assimilation between root and shoot of V. faba varies both with cultivar and with external nitrate concentration.
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Claims 10
Claim · model-written summary
Total plant dry weight and carbon content remained constant across increased nitrate concentrations.
- Taxon
- Vicia faba L.
Vicia fabat0 - Treatment
- nitratet0
- Outcome
- Total plant dry weight and carbon contente0
- Direction
- remained constante0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total plant dry weight and carbon content remained constant while shoot: root dry weight ratio, total plant nitrogen, total plant leaf area and specific leaf area (SLA) all increased.”
t0“Nitrate Assimilation Between Root and Shoot in Vicia faba L.”
Claim · model-written summary
Shoot to root dry weight ratio increased with nitrate.
- Taxon
- Vicia faba L.Vicia fabat0
- Treatment
- nitratet0
- Outcome
- shoot: root dry weight ratioe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shoot: root dry weight ratio, total plant nitrogen, total plant leaf area and specific leaf area (SLA) all increased.”
t0“Nitrate Assimilation Between Root and Shoot in Vicia faba L.”
Claim · model-written summary
Total plant nitrogen increased with nitrate.
- Taxon
- Vicia faba L.Vicia fabat0
- Treatment
- nitratet0
- Outcome
- total plant nitrogene0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shoot: root dry weight ratio, total plant nitrogen, total plant leaf area and specific leaf area (SLA) all increased.”
t0“Nitrate Assimilation Between Root and Shoot in Vicia faba L.”
Claim · model-written summary
Total leaf area and specific leaf area increased with nitrate.
- Taxon
- Vicia faba L.Vicia fabat0
- Treatment
- nitratet0
- Outcome
- total plant leaf area and specific leaf area (SLA)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shoot: root dry weight ratio, total plant nitrogen, total plant leaf area and specific leaf area (SLA) all increased.”
t0“Nitrate Assimilation Between Root and Shoot in Vicia faba L.”
Claim · model-written summary
The shoot fraction of plant nitrate increased with applied nitrate in both cultivars.
- Taxon
- Vicia faba L.Vicia fabat0
- Treatment
- applied nitrate concentrationse0
- Outcome
- proportion of total plant nitratee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The proportion of total plant nitrate and nitrate reductase (NR) activity found in the shoot of both cultivars increased with applied nitrate concentrations as did NO3−: Kjeldahl-N ratios of xylem sap.”
t0“Nitrate Assimilation Between Root and Shoot in Vicia faba L.”
Claim · model-written summary
The shoot fraction of nitrate reductase activity increased with applied nitrate in both cultivars.
- Taxon
- Vicia faba L.Vicia fabat0
- Treatment
- applied nitrate concentrationse0
- Gene
- nitrate reductase (NR)e0
- Outcome
- nitrate reductase (NR) activity found in the shoote0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The proportion of total plant nitrate and nitrate reductase (NR) activity found in the shoot of both cultivars increased with applied nitrate concentrations as did NO3−: Kjeldahl-N ratios of xylem sap.”
t0“Nitrate Assimilation Between Root and Shoot in Vicia faba L.”
Claim · model-written summary
The xylem sap nitrate to Kjeldahl-N ratio increased with applied nitrate.
- Taxon
- Vicia faba L.Vicia fabat0
- Treatment
- applied nitrate concentrationse0
- Outcome
- NO3−: Kjeldahl-N ratios of xylem sape0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The proportion of total plant nitrate and nitrate reductase (NR) activity found in the shoot of both cultivars increased with applied nitrate concentrations as did NO3−: Kjeldahl-N ratios of xylem sap.”
t0“Nitrate Assimilation Between Root and Shoot in Vicia faba L.”
Claim · model-written summary
Herz Freya had a greater shoot fraction of nitrate reductase activity than Banner Winter at all nitrate concentrations.
- Taxon
- Vicia faba L.Vicia fabat0
- Material
- Herz Freyae0
- Gene
- NRe0
- Outcome
- proportion of total plant NR activity occurred in the shoote0
- Direction
- greatere0
- Comparator
- Banner Wintere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a greater proportion of total plant NR activity occurred in the shoot of cv. Herz Freya at all applied nitrate concentrations”
t0“Nitrate Assimilation Between Root and Shoot in Vicia faba L.”
e1“two cultivars (Banner Winter and Herz Freya) of Vicia faba L.”
Claim · model-written summary
Herz Freya consistently had a greater xylem sap nitrate to Kjeldahl-N ratio than Banner Winter.
- Taxon
- Vicia faba L.Vicia fabat0
- Material
- Herz Freyae1
- Outcome
- xylem sap NO3−: Kjeldahl-N ratioe0
- Direction
- greatere0
- Comparator
- Banner Wintere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its xylem sap NO3−: Kjeldahl-N ratio and SLA were consistently greater.”
t0“Nitrate Assimilation Between Root and Shoot in Vicia faba L.”
e1“two cultivars (Banner Winter and Herz Freya) of Vicia faba L.”
Claim · model-written summary
Herz Freya consistently had greater specific leaf area than Banner Winter.
- Taxon
- Vicia faba L.Vicia fabat0
- Material
- Herz Freyae1
- Outcome
- SLAe0
- Direction
- greatere0
- Comparator
- Banner Wintere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its xylem sap NO3−: Kjeldahl-N ratio and SLA were consistently greater.”
t0“Nitrate Assimilation Between Root and Shoot in Vicia faba L.”
e1“two cultivars (Banner Winter and Herz Freya) of Vicia faba L.”
The same questions in other papers
nitrogen · growth · Vicia faba (faba bean)Positive and negative results
4 papers in the same direction as this paper · 21 in the opposite direction
- positive
- positive
- positive
22 papers more in this group
See all 26 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.