Abstract
Leaf gas exchange, plant growth and leaf ion content were measured in wheat (Triticum durum L. cv. HD 4502) exposed to steady- state salinities (1.6, 12.0 and 16.0 dS nr-1) for 8 weeks. Salinity reduced leaf area and number of tillers, and increased Na+ and Cl- concentrations in leaves. Leaf- to- leaf gradients of these ions were observed. The oldest leaf contained 6 to 8 times more Na+ and Cl- than the flag leaf. Net photosynthetic rate (PN), transpiration rate (E) and stomatal conductance (gS) were the highest in flag leaf, declined in the middle and fully expanded leaves, and were minimum in the oldest leaves. These processes were reduced by salinity with similar leaf- to- leaf gradients. Intercellular CO2 concentrations in the older leaves were higher than in the flag leaf in non-saline plants, and increased similarly with salinity. Leaf age was the major factor in reducing PN, and senescence processes were promoted by salinity.
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Claims 10
Claim · model-written summary
Salinity reduced leaf area and number of tillers in wheat.
- Taxon
- wheat
Triticum aestivume0 - Material
- HD 4502e0
- Treatment
- Salinitye1
- Outcome
- leaf area and number of tillerse1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“measured in wheat (Triticum durum L. cv. HD 4502)”
e1“Salinity reduced leaf area and number of tillers, and increased Na+ and Cl- concentrations in leaves”
Claim · model-written summary
Salinity increased Na+ and Cl- concentrations in wheat leaves.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- leavese1
- Treatment
- Salinitye1
- Outcome
- Na+ and Cl- concentrationse1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“measured in wheat (Triticum durum L. cv. HD 4502)”
e1“Salinity reduced leaf area and number of tillers, and increased Na+ and Cl- concentrations in leaves”
Claim · model-written summary
The oldest wheat leaf contained 6 to 8 times more Na+ and Cl- than the flag leaf.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- oldest leafe1
- Outcome
- Na+ and Cl-e1
- Direction
- moree1
- Value
- 6 to 8 timese1
- Comparator
- flag leafe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“measured in wheat (Triticum durum L. cv. HD 4502)”
e1“The oldest leaf contained 6 to 8 times more Na+ and Cl- than the flag leaf”
Claim · model-written summary
Leaf-to-leaf gradients of Na+ and Cl- were observed in wheat.
- Taxon
- wheatTriticum aestivume0
- Outcome
- Leaf- to- leaf gradientse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“measured in wheat (Triticum durum L. cv. HD 4502)”
e1“Leaf- to- leaf gradients of these ions were observed”
Claim · model-written summary
In wheat, net photosynthetic rate, transpiration rate and stomatal conductance were highest in the flag leaf and minimum in the oldest leaves.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- flag leafe1
- Outcome
- Net photosynthetic rate (PN), transpiration rate (E) and stomatal conductance (gS)e1
- Direction
- higheste1
- Qualifier
- minimum in the oldest leavese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“measured in wheat (Triticum durum L. cv. HD 4502)”
e1“Net photosynthetic rate (PN), transpiration rate (E) and stomatal conductance (gS) were the highest in flag leaf, declined in the middle and fully expanded leaves, and were minimum in the oldest leaves”
Claim · model-written summary
Salinity reduced net photosynthetic rate, transpiration rate and stomatal conductance in wheat, with similar leaf-to-leaf gradients.
- Taxon
- wheatTriticum aestivume0
- Treatment
- salinitye2
- Outcome
- Net photosynthetic rate (PN), transpiration rate (E) and stomatal conductance (gS)e1
- Direction
- reducede2
- Qualifier
- similar leaf- to- leaf gradientse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“measured in wheat (Triticum durum L. cv. HD 4502)”
e1“Net photosynthetic rate (PN), transpiration rate (E) and stomatal conductance (gS) were the highest in flag leaf, declined in the middle and fully expanded leaves, and were minimum in the oldest leaves”
e2“These processes were reduced by salinity with similar leaf- to- leaf gradients”
Claim · model-written summary
Intercellular CO2 concentrations in older wheat leaves were higher than in the flag leaf of non-saline plants.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- older leavese1
- Outcome
- Intercellular CO2 concentrationse1
- Direction
- highere1
- Qualifier
- non-saline plantse1
- Comparator
- flag leafe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“measured in wheat (Triticum durum L. cv. HD 4502)”
e1“Intercellular CO2 concentrations in the older leaves were higher than in the flag leaf in non-saline plants, and increased similarly with salinity”
Claim · model-written summary
Salinity increased intercellular CO2 concentrations in the older wheat leaves similarly.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- older leavese1
- Treatment
- salinitye1
- Outcome
- Intercellular CO2 concentrationse1
- Direction
- increasede1
- Comparator
- non-saline plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“measured in wheat (Triticum durum L. cv. HD 4502)”
e1“Intercellular CO2 concentrations in the older leaves were higher than in the flag leaf in non-saline plants, and increased similarly with salinity”
Claim · model-written summary
Leaf age was the major factor in reducing net photosynthetic rate in wheat.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- Leaf agee1
- Outcome
- PNe1
- Direction
- reducinge1
- Qualifier
- major factore1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“measured in wheat (Triticum durum L. cv. HD 4502)”
e1“Leaf age was the major factor in reducing PN”
Claim · model-written summary
Salinity promoted senescence processes in wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- salinitye1
- Outcome
- senescence processese1
- Direction
- promotede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“measured in wheat (Triticum durum L. cv. HD 4502)”
e1“senescence processes were promoted by salinity”
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See all 227 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.