Abstract
Abstract Chickpea plants (Cicer arietinum L cv. ILC 195) were grown for 24 days in water culture with NO3 or NH4‐N, with or without P. The lack of P in the nutrient medium depressed total plant fresh and dry weight yields but did not induce visual symptoms of P deficiency in the shoots despite the low P concentrations found in the plant tissues. For both N‐forms, P stress decreased shoot dry weights. The effect of the stress on the root systems varied with the N‐source. For NO3‐fed plants, roots of stressed plants were longer and slightly greater in weight than those of unstressed plants but for plants supplied with NH4‐N, root weight was depressed by the lack of P. With both forms of N, P stress decreased the shoot:root ratio. For the unstressed plants the forms of N‐nutrition induced typical changes in the nutrient solution but when NO3‐fed plants were deprived of P, the nutrient medium became more acid. The response of the NO3‐fed P‐stressed plants to acidify the nutrient medium was slow. Phosphorus stress decreased the total uptake of all ions. For NO3‐fed plants the uptake of Mg was less affected by the stress and, in contrast to K and Ca, was increased in relation to the depression in growth. P stress depressed the uptake of anions more than cations and NO3‐ uptake was most affected. For NH4‐fed plants, P stress decreased the uptake of anions more than cations. Of the major cations, K and Ca were particularly depressed but Mg was less affected. The uptake of NH4 was slightly enhanced in relation to the reduction in growth, indicating that N was not the limiting factor for plant growth. With both forms of N there was evidence of a greater accumulation of organic anions in the roots and sap of P deficient plants.
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Claims 19
Claim · model-written summary
P omission depressed total fresh and dry weight yields.
- Taxon
- Chickpea
Cicer arietinumt0 - Treatment
- lack of Pe0
- Outcome
- total plant fresh and dry weight yieldse0
- Direction
- depressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lack of P in the nutrient medium depressed total plant fresh and dry weight yields”
t0“Chickpea”
Claim · model-written summary
P omission did not cause visible shoot deficiency symptoms.
- Taxon
- ChickpeaCicer arietinumt0
- Outcome
- visual symptoms of P deficiency in the shootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“did not induce visual symptoms of P deficiency in the shoots”
t0“Chickpea”
Claim · model-written summary
P stress decreased shoot dry weights under both nitrogen forms.
- Taxon
- ChickpeaCicer arietinumt0
- Treatment
- P stresse0
- Outcome
- shoot dry weightse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For both N‐forms, P stress decreased shoot dry weights”
t0“Chickpea”
Claim · model-written summary
With NO3, P-stressed roots were longer and slightly heavier than unstressed roots.
- Taxon
- ChickpeaCicer arietinumt0
- Treatment
- stressed plantse0
- Outcome
- roots of stressed plants were longer and slightly greater in weighte0
- Direction
- longere0
- Comparator
- unstressed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For NO3‐fed plants, roots of stressed plants were longer and slightly greater in weight than those of unstressed plants”
t0“Chickpea”
Claim · model-written summary
With NH4, P omission depressed root weight.
- Taxon
- ChickpeaCicer arietinumt0
- Treatment
- lack of Pe0
- Outcome
- root weighte0
- Direction
- depressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for plants supplied with NH4‐N, root weight was depressed by the lack of P”
t0“Chickpea”
Claim · model-written summary
P stress decreased the shoot:root ratio with either N form.
- Taxon
- ChickpeaCicer arietinumt0
- Treatment
- P stresse0
- Outcome
- shoot:root ratioe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With both forms of N, P stress decreased the shoot:root ratio”
t0“Chickpea”
Claim · model-written summary
P deprivation made the medium more acidic with NO3.
- Taxon
- ChickpeaCicer arietinumt0
- Treatment
- deprived of Pe0
- Outcome
- nutrient medium became more acide0
- Direction
- more acide0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when NO3‐fed plants were deprived of P, the nutrient medium became more acid”
t0“Chickpea”
Claim · model-written summary
NO3-fed P-stressed plants acidified the medium slowly.
- Taxon
- ChickpeaCicer arietinumt0
- Outcome
- acidify the nutrient medium was slowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response of the NO3‐fed P‐stressed plants to acidify the nutrient medium was slow”
t0“Chickpea”
Claim · model-written summary
P stress decreased total uptake of all ions.
- Taxon
- ChickpeaCicer arietinumt0
- Treatment
- Phosphorus stresse0
- Outcome
- total uptake of all ionse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus stress decreased the total uptake of all ions”
t0“Chickpea”
Claim · model-written summary
With NO3, Mg uptake was less affected by stress.
- Taxon
- ChickpeaCicer arietinumt0
- Treatment
- stresse0
- Outcome
- uptake of Mge0
- Direction
- less affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For NO3‐fed plants the uptake of Mg was less affected by the stress”
t0“Chickpea”
Claim · model-written summary
Mg uptake increased relative to growth depression, unlike K and Ca.
- Taxon
- ChickpeaCicer arietinumt0
- Outcome
- increased in relation to the depression in growthe0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in contrast to K and Ca, was increased in relation to the depression in growth”
t0“Chickpea”
Claim · model-written summary
P stress depressed anion uptake more than cation uptake.
- Taxon
- ChickpeaCicer arietinumt0
- Treatment
- P stresse0
- Outcome
- uptake of anions more than cationse0
- Direction
- depressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P stress depressed the uptake of anions more than cations”
t0“Chickpea”
Claim · model-written summary
NO3 uptake was most affected.
- Taxon
- ChickpeaCicer arietinumt0
- Outcome
- NO3‐ uptakee0
- Direction
- most affectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NO3‐ uptake was most affected”
t0“Chickpea”
Claim · model-written summary
With NH4, P stress decreased anion uptake more than cation uptake.
- Taxon
- ChickpeaCicer arietinumt0
- Treatment
- P stresse0
- Outcome
- uptake of anions more than cationse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For NH4‐fed plants, P stress decreased the uptake of anions more than cations”
t0“Chickpea”
Claim · model-written summary
K and Ca uptake were particularly depressed.
- Taxon
- ChickpeaCicer arietinumt0
- Outcome
- K and Ca were particularly depressede0
- Direction
- depressede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Of the major cations, K and Ca were particularly depressed”
t0“Chickpea”
Claim · model-written summary
Mg uptake was less affected.
- Taxon
- ChickpeaCicer arietinumt0
- Outcome
- Mg was less affectede0
- Direction
- less affectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but Mg was less affected”
t0“Chickpea”
Claim · model-written summary
NH4 uptake was slightly enhanced relative to growth reduction.
- Taxon
- ChickpeaCicer arietinumt0
- Outcome
- uptake of NH4e0
- Direction
- enhancede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The uptake of NH4 was slightly enhanced in relation to the reduction in growth”
t0“Chickpea”
Claim · model-written summary
The authors inferred nitrogen did not limit growth.
- Taxon
- ChickpeaCicer arietinumt0
- Outcome
- N was not the limiting factor for plant growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N was not the limiting factor for plant growth”
t0“Chickpea”
Claim · model-written summary
P-deficient roots and sap accumulated more organic anions with either N form.
- Taxon
- ChickpeaCicer arietinumt0
- Outcome
- accumulation of organic anions in the roots and sape0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With both forms of N there was evidence of a greater accumulation of organic anions in the roots and sap of P deficient plants”
t0“Chickpea”
The same questions in other papers
phosphorus · nutrient: content · Cicer arietinum (chickpea)Positive and negative results
37 in the opposite direction
- positive
- positive
- positive
34 papers more in this group
See all 38 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.