Abstract
Wheat was sown in a phosphorus (P) deficient soil. Plants at low levels of applied P had lower growth rates and lower concentrations of phosphate in the shoots than plants grown with ‘high P’. Activities of both insoluble and soluble phosphatase increased with P deficiency in the mature leaves. Soluble phosphatase activities increased 2.5–3.0 fold as the concentration of phosphate in the leaves fell from 0.4% to 0.1% dry weight This increase was not a consequence of reduced growth, as severe nitrogen deficiency had no effect on phosphatase activity. Soluble phosphatase activities were higher in young than in mature leaves, and also increased 3–4 fold with severe water deficit. However these increases in activity were not accompanied by low concentrations of phosphate. Moreover, soluble phosphatase activities in mature leaves of plants grown under conditions of water deficit rapidly decreased after rewatering. In contrast, the high soluble phosphatase activities in mature leaves of P deficient wheat persisted for up to 12 d after the resupply of P to adequate levels.
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Claims 11
Claim · model-written summary
Low applied phosphorus lowered wheat growth rates relative to high phosphorus.
- Taxon
- Wheat
Triticum aestivume0 - Treatment
- low levels of applied Pe1
- Outcome
- growth ratese1
- Direction
- lowere1
- Comparator
- plants grown with ‘high P’e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat was sown in a phosphorus (P) deficient soil.”
e1“Plants at low levels of applied P had lower growth rates and lower concentrations of phosphate in the shoots than plants grown with ‘high P’.”
Claim · model-written summary
Low applied phosphorus lowered phosphate concentrations in wheat shoots relative to high phosphorus.
- Taxon
- WheatTriticum aestivume0
- Treatment
- low levels of applied Pe1
- Outcome
- concentrations of phosphate in the shootse1
- Direction
- lowere1
- Comparator
- plants grown with ‘high P’e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat was sown in a phosphorus (P) deficient soil.”
e1“Plants at low levels of applied P had lower growth rates and lower concentrations of phosphate in the shoots than plants grown with ‘high P’.”
Claim · model-written summary
Phosphorus deficiency increased insoluble phosphatase activity in mature wheat leaves.
- Taxon
- WheatTriticum aestivume0
- Organ / stage
- mature leavese1
- Treatment
- P deficiencye1
- Outcome
- insoluble and soluble phosphatasee1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat was sown in a phosphorus (P) deficient soil.”
e1“Activities of both insoluble and soluble phosphatase increased with P deficiency in the mature leaves.”
Claim · model-written summary
Phosphorus deficiency increased soluble phosphatase activity in mature wheat leaves.
- Taxon
- WheatTriticum aestivume0
- Organ / stage
- mature leavese1
- Treatment
- P deficiencye1
- Outcome
- soluble phosphatasee1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat was sown in a phosphorus (P) deficient soil.”
e1“Activities of both insoluble and soluble phosphatase increased with P deficiency in the mature leaves.”
Claim · model-written summary
Soluble phosphatase activity rose 2.5–3.0 fold as wheat leaf phosphate concentration fell from 0.4% to 0.1% dry weight.
- Taxon
- WheatTriticum aestivume0
- Compound
- phosphatee1
- Outcome
- Soluble phosphatase activitiese1
- Direction
- increasede1
- Value
- 2.5–3.0 folde1
- Qualifier
- 0.4% to 0.1% dry weighte1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat was sown in a phosphorus (P) deficient soil.”
e1“Soluble phosphatase activities increased 2.5–3.0 fold as the concentration of phosphate in the leaves fell from 0.4% to 0.1% dry weight”
Claim · model-written summary
Severe nitrogen deficiency did not change wheat phosphatase activity.
- Taxon
- WheatTriticum aestivume0
- Treatment
- severe nitrogen deficiencye1
- Outcome
- phosphatase activitye1
- Direction
- no effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat was sown in a phosphorus (P) deficient soil.”
e1“severe nitrogen deficiency had no effect on phosphatase activity”
Claim · model-written summary
Soluble phosphatase activity was higher in young than mature wheat leaves.
- Taxon
- WheatTriticum aestivume0
- Organ / stage
- younge1
- Outcome
- Soluble phosphatase activitiese1
- Direction
- highere1
- Comparator
- mature leavese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat was sown in a phosphorus (P) deficient soil.”
e1“Soluble phosphatase activities were higher in young than in mature leaves”
Claim · model-written summary
Severe water deficit increased soluble phosphatase activity 3–4 fold in wheat leaves.
- Taxon
- WheatTriticum aestivume0
- Treatment
- severe water deficite1
- Outcome
- Soluble phosphatase activitiese1
- Direction
- increasede1
- Value
- 3–4 folde1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat was sown in a phosphorus (P) deficient soil.”
e1“Soluble phosphatase activities were higher in young than in mature leaves, and also increased 3–4 fold with severe water deficit.”
Claim · model-written summary
Increased soluble phosphatase activity under water deficit was not accompanied by low phosphate concentration in wheat leaves.
- Taxon
- WheatTriticum aestivume0
- Outcome
- low concentrations of phosphatee1
- Direction
- not accompaniede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat was sown in a phosphorus (P) deficient soil.”
e1“However these increases in activity were not accompanied by low concentrations of phosphate.”
Claim · model-written summary
After rewatering, soluble phosphatase activity rapidly decreased in mature leaves of water-deficient wheat.
- Taxon
- WheatTriticum aestivume0
- Organ / stage
- mature leavese1
- Treatment
- rewateringe1
- Outcome
- soluble phosphatase activitiese1
- Direction
- rapidly decreasede1
- Qualifier
- conditions of water deficite1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat was sown in a phosphorus (P) deficient soil.”
e1“soluble phosphatase activities in mature leaves of plants grown under conditions of water deficit rapidly decreased after rewatering”
Claim · model-written summary
High soluble phosphatase activity persisted for up to 12 d after phosphorus resupply in mature leaves of phosphorus-deficient wheat.
- Taxon
- wheatTriticum aestivume1
- Organ / stage
- mature leavese1
- Outcome
- high soluble phosphatase activitiese1
- Direction
- persistede1
- Value
- up to 12 de1
- Qualifier
- after the resupply of P to adequate levelse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat was sown in a phosphorus (P) deficient soil.”
e1“high soluble phosphatase activities in mature leaves of P deficient wheat persisted for up to 12 d after the resupply of P to adequate levels”
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See all 193 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.