Abstract
Leaf acid phosphatase (APase) activities of 274 soybean genotypes were surveyed under fieldconditions with two levels of P supplies, and a nutrient solution culture experiment with eight selectedgenotypes was subsequently conducted under greenhouse conditions to further characterize APase ac-tivity and its isoform expression induced by P starvation. Results from the field experiment showed thatthere was a great genotypic variation for leaf APase activity among the tested soybean genotypes fromdifferent origins, and APase activity in many of the tested genotypes (about 60%) was generally increasedin the treatment without P fertilizer addition. Results from the nutrient solution culture experimentshowed that APase activity in all the eight tested genotypes was generally enhanced by P starvation. Sixisoforms of APases were detected in isoelectric focusing gels with samples from both young and oldleaves. The activity of all the six isoforms was increased by P starvation, but no new APase isoform wasinduced. Our results suggest that leaf APase activity could serve as an enzymatic indicator of P starvationfor soybean; the increase in leaf APase activity under low P stress was mainly caused by the increase inthe activity of existing isoforms but not by the induction of new isoforms.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Leaf APase activity varied greatly among soybean genotypes.
- Taxon
- soybean
Glycine maxt0 - Material
- soybean genotypese0
- Outcome
- leaf APase activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was a great genotypic variation for leaf APase activity among the tested soybean genotypes fromdifferent origins”
t0“soybean”
Claim · model-written summary
Without P fertilizer, APase activity generally increased in about 60% of genotypes.
- Taxon
- soybeanGlycine maxt0
- Treatment
- treatment without P fertilizer additione0
- Outcome
- APase activitye0
- Direction
- increasede0
- Value
- about 60%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“APase activity in many of the tested genotypes (about 60%) was generally increasedin the treatment without P fertilizer addition.”
t0“soybean”
Claim · model-written summary
P starvation enhanced APase activity in all eight selected genotypes.
- Taxon
- soybeanGlycine maxt0
- Treatment
- P starvatione0
- Outcome
- APase activitye0
- Direction
- enhancede0
- Value
- eight tested genotypese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“APase activity in all the eight tested genotypes was generally enhanced by P starvation.”
t0“soybean”
Claim · model-written summary
Six APase isoforms were detected in young and old leaves.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- young and oldleavese0
- Outcome
- isoforms of APasese0
- Value
- Sixisoformse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sixisoforms of APases were detected in isoelectric focusing gels with samples from both young and oldleaves.”
t0“soybean”
Claim · model-written summary
P starvation increased activity of all six APase isoforms.
- Taxon
- soybeanGlycine maxt0
- Treatment
- P starvatione0
- Outcome
- activity of all the six isoformse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of all the six isoforms was increased by P starvation, but no new APase isoform wasinduced.”
t0“soybean”
Claim · model-written summary
P starvation induced no new APase isoform.
- Taxon
- soybeanGlycine maxt0
- Outcome
- no new APase isoform wasinducede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of all the six isoforms was increased by P starvation, but no new APase isoform wasinduced.”
t0“soybean”
Claim · model-written summary
Leaf APase activity may indicate P starvation in soybean.
- Taxon
- soybeanGlycine maxt0
- Outcome
- enzymatic indicator of P starvatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf APase activity could serve as an enzymatic indicator of P starvationfor soybean”
t0“soybean”
Claim · model-written summary
Increased activity of existing isoforms mainly explained higher leaf APase activity under low P.
- Taxon
- soybeanGlycine maxt0
- Outcome
- leaf APase activitye0
- Direction
- increasee0
- Qualifier
- increase inthe activity of existing isoformse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increase in leaf APase activity under low P stress was mainly caused by the increase inthe activity of existing isoforms but not by the induction of new isoforms.”
t0“soybean”
The same questions in other papers
phosphorus · physiology: enzyme activity · Glycine max (soybean)Positive and negative results
2 papers in the same direction as this paper · 7 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- negative
- positive
6 papers more in this group
See all 10 papers →fertilization · physiology: enzyme activity · Glycine max (soybean)Positive and negative results
11 papers in the same direction as this paper · 4 in the opposite direction
- negative
- no effect
- negative
12 papers more in this group
See all 16 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.