Abstract
The effect of phosphate supply during the first 4 weeks of the life cycle of wheat ( Triticum aestivum L. cv. Martonvásári‐8) was investigated by following growth of seedlings, P levels in roots and shoots, changes of soluble phosphatases in roots and alteration of Ca 2+ ‐ and Mg 2+ ‐ATPase activity in the microsomal fraction. Plants were grown in complete nutrient solution supplemented with different levels of phosphate. Maximal growth rate was attained at 0.2 m M phosphate. The total P level in plants increased with increasing phosphate concentration in the growth solution, however, it decreased with age. Microsomal ATPase activity in 14‐day‐old plants increased with phosphorus deficiency. Using phosphocellulose column chromatography, a phosphatase (EC 3.1.3.2) induced by phosphorus deficiency was purified and partially characterized from the 30 000 g supernatant from roots of 14‐ to 30‐day‐old wheat plants. Na‐pyrophosphate, p ‐nitrophenylphosphate, ATP, ADP, AMP, O‐phosphoryl‐ l ‐serine and glucose‐6‐phosphate were all substrates for the enzyme. Its native molecular weight was 42 kDa as determined by Sephadex G‐200 column chromatography. Readdition of phosphate to the growth solution resulted in a gradual decrease of the phosphatase activity, probably due to repression of its synthesis. We hypothesize that the extra phosphatase may participate in the adaptation mechanism under phosphorus‐deficient conditions.
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Claims 9
Claim · model-written summary
Wheat growth rate was maximal at 0.2 m M phosphate.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- 0.2 m M phosphatee0
- Outcome
- growth ratee0
- Direction
- Maximale0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximal growth rate was attained at 0.2 m M phosphate.”
t0“winter wheat”
Claim · model-written summary
Wheat total phosphorus increased with phosphate concentration in solution.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- phosphate concentration in the growth solutione0
- Outcome
- total P level in plantse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total P level in plants increased with increasing phosphate concentration in the growth solution”
t0“winter wheat”
Claim · model-written summary
Wheat total phosphorus decreased with plant age.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- agee0
- Outcome
- total P levele0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total P level in plants increased with increasing phosphate concentration in the growth solution, however, it decreased with age.”
t0“Phosphatase induction in roots of winter wheat during adaptation to phosphorus deficiency”
Claim · model-written summary
Phosphorus deficiency increased microsomal ATPase activity in 14-day-old wheat.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- 14‐day‐old plantse0
- Treatment
- phosphorus deficiencye0
- Outcome
- Microsomal ATPase activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Microsomal ATPase activity in 14‐day‐old plants increased with phosphorus deficiency.”
t0“winter wheat”
Claim · model-written summary
Phosphorus deficiency induced a root phosphatase in 14- to 30-day-old wheat.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- roots of 14‐ to 30‐day‐old wheat plantse0
- Treatment
- phosphorus deficiencye0
- Gene
- phosphatase (EC 3.1.3.2)e0
- Outcome
- inducede0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a phosphatase (EC 3.1.3.2) induced by phosphorus deficiency was purified and partially characterized from the 30 000 g supernatant from roots of 14‐ to 30‐day‐old wheat plants.”
Claim · model-written summary
The isolated wheat phosphatase used Na-pyrophosphate, p-nitrophenylphosphate, ATP, ADP, AMP, O-phosphoryl-l-serine and glucose-6-phosphate as substrates.
- Taxon
- wheatTriticum aestivumt0
- Gene
- enzymee0
- Outcome
- Na‐pyrophosphate, p ‐nitrophenylphosphate, ATP, ADP, AMP, O‐phosphoryl‐ l ‐serine and glucose‐6‐phosphate were all substratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Na‐pyrophosphate, p ‐nitrophenylphosphate, ATP, ADP, AMP, O‐phosphoryl‐ l ‐serine and glucose‐6‐phosphate were all substrates for the enzyme.”
t0“winter wheat”
Claim · model-written summary
The purified wheat phosphatase had native molecular weight 42 kDa.
- Taxon
- wheatTriticum aestivumt0
- Gene
- phosphataset0
- Outcome
- native molecular weighte0
- Value
- 42 kDae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Its native molecular weight was 42 kDa as determined by Sephadex G‐200 column chromatography.”
t0“Phosphatase induction in roots of winter wheat”
Claim · model-written summary
Phosphate readdition gradually decreased wheat phosphatase activity.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Readdition of phosphate to the growth solutione0
- Outcome
- phosphatase activitye0
- Direction
- gradual decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Readdition of phosphate to the growth solution resulted in a gradual decrease of the phosphatase activity”
t0“winter wheat”
Claim · model-written summary
The authors hypothesize that extra phosphatase participates in adaptation to phosphorus deficiency.
- Taxon
- wheatTriticum aestivumt0
- Gene
- extra phosphatasee0
- Outcome
- adaptation mechanism under phosphorus‐deficient conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We hypothesize that the extra phosphatase may participate in the adaptation mechanism under phosphorus‐deficient conditions.”
t0“winter wheat”
The same questions in other papers
phosphorus · growth · Triticum aestivum (wheat)Positive and negative results
157 papers in the same direction as this paper · 34 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- no effect
189 papers more in this group
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.