Abstract
The interactive effects of salinity and phosphorus availability on growth, water relations, nutritional status and photosynthetic activity were investigated in barley (Hordeum vulgare L. cv. Manel). Seedlings were grown hydroponically under low or sufficient phosphorus (P) supply (5 or 180 μmol KH(2) PO(4) plant(-1) week(-1) , respectively), with or without 100 mm NaCl. Phosphorus deficiency or salinity significantly decreased whole plant growth, leaf water content, leaf osmotic potential and gas exchange parameters, with a more marked impact of P stress. The effect of both stresses was not additive since the response of plants to combined salinity and P deficiency was similar to that of plants grown under P deficiency alone. In addition, salt-treated plants exposed to P deficiency showed higher salt tolerance compared to plants grown with sufficient P supply. This was related to plant ability to significantly increase root:shoot DW ratio, root length, K(+)/Na(+) ratio, leaf proline and soluble sugar concentrations and total non-enzymatic antioxidant capacity, together with restricting Na(+) accumulation in the upper leaves. As a whole, our results indicate that under concomitant exposure to both salt and P deficiency, the impact of the latter constraint is pre-dominant.
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Claims 8
Claim · model-written summary
Phosphorus deficiency significantly reduced barley growth and physiological measures.
- Taxon
- barley (Hordeum vulgare L. cv. Manel)
.jpg?width=60)
Hordeum vulgaree1 - Treatment
- Phosphorus deficiencye0
- Outcome
- whole plant growth, leaf water content, leaf osmotic potential and gas exchange parameterse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Phosphorus deficiency or salinity significantly decreased whole plant growth, leaf water content, leaf osmotic potential and gas exchange parameters”
e1“barley (Hordeum vulgare L. cv. Manel)”
Claim · model-written summary
Salinity significantly reduced barley growth and physiological measures.
- Taxon
- barley (Hordeum vulgare L. cv. Manel)Hordeum vulgaree1
- Treatment
- salinitye0
- Outcome
- whole plant growth, leaf water content, leaf osmotic potential and gas exchange parameterse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus deficiency or salinity significantly decreased whole plant growth, leaf water content, leaf osmotic potential and gas exchange parameters”
e1“barley (Hordeum vulgare L. cv. Manel)”
Claim · model-written summary
Phosphorus stress had the more marked impact.
- Taxon
- barley (Hordeum vulgare L. cv. Manel)Hordeum vulgaree1
- Outcome
- impact of P stresse0
- Direction
- more markede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with a more marked impact of P stress”
e1“barley (Hordeum vulgare L. cv. Manel)”
Claim · model-written summary
The combined stress response was similar to phosphorus deficiency alone.
- Taxon
- barley (Hordeum vulgare L. cv. Manel)Hordeum vulgaree1
- Treatment
- combined salinity and P deficiencye0
- Outcome
- response of plantse0
- Direction
- similare0
- Comparator
- P deficiency alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“response of plants to combined salinity and P deficiency was similar to that of plants grown under P deficiency alone”
e1“barley (Hordeum vulgare L. cv. Manel)”
Claim · model-written summary
Salt-treated phosphorus-deficient plants showed higher salt tolerance than those with sufficient phosphorus.
- Taxon
- barley (Hordeum vulgare L. cv. Manel)Hordeum vulgaree1
- Treatment
- P deficiencye0
- Outcome
- salt tolerancee0
- Direction
- highere0
- Comparator
- sufficient P supplye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt-treated plants exposed to P deficiency showed higher salt tolerance compared to plants grown with sufficient P supply”
e1“barley (Hordeum vulgare L. cv. Manel)”
Claim · model-written summary
Under phosphorus deficiency, barley increased root:shoot dry weight ratio, root length, and K(+)/Na(+) ratio.
- Taxon
- barley (Hordeum vulgare L. cv. Manel)Hordeum vulgaree1
- Outcome
- root:shoot DW ratio, root length, K(+)/Na(+) ratioe0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significantly increase root:shoot DW ratio, root length, K(+)/Na(+) ratio”
e1“barley (Hordeum vulgare L. cv. Manel)”
Claim · model-written summary
Under phosphorus deficiency, barley increased leaf proline and soluble sugar concentrations and antioxidant capacity.
- Taxon
- barley (Hordeum vulgare L. cv. Manel)Hordeum vulgaree2
- Outcome
- leaf proline and soluble sugar concentrations and total non-enzymatic antioxidant capacitye0
- Direction
- increasee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf proline and soluble sugar concentrations and total non-enzymatic antioxidant capacity”
e1“significantly increase root:shoot DW ratio, root length, K(+)/Na(+) ratio, leaf proline and soluble sugar concentrations and total non-enzymatic antioxidant capacity”
e2“barley (Hordeum vulgare L. cv. Manel)”
Claim · model-written summary
Under phosphorus deficiency, barley restricted sodium accumulation in upper leaves.
- Taxon
- barley (Hordeum vulgare L. cv. Manel)Hordeum vulgaree1
- Outcome
- Na(+) accumulation in the upper leavese0
- Direction
- restrictinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“restricting Na(+) accumulation in the upper leaves”
e1“barley (Hordeum vulgare L. cv. Manel)”
The same questions in other papers
phosphorus · physiology: gas exchange · Hordeum vulgare (barley)Positive and negative results
2 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- no effect
- no effect
salinity · physiology: gas exchange · Hordeum vulgare (barley)Results agree
5 papers in the same direction as this paper
- negative
- negative
- negative
2 papers more in this group
See all 6 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.