Abstract
Abstract The accumulation of the β-subunit of β-conglycinin, a major soybean storage protein, in seeds is controlled by the nitrogen (N) status of the plant. When non-nodulating soybean mutants (T201) were hydroponically cultivated under N-sufficient conditions (supply of 5 mM NaN03 to the medium), β-subunit accumulation was first detected at 30 d after flowering (DAF). In N-deficient plants (supply of 1 mM NaNO3), the accumulation of the β-subunit was stronglyinhibited. When 5 mM 15N-labeled NO3 - was supplied for 1 week to N-deficient T201 plants before 28 DAF, the β-subunit protein did not accumulate, but the application of 5 mM NO3 - after 28 DAF, led to a substantial accumulation of the β-subunit. The total 15N percentage in mature seeds was similar, irrespective of the time of feeding, regardless of the accumulation of the β-subunit. The 7 S (mostly composed of β-conglycinin) and 11 S globulins (mostly glycinin, which was another major component of storage protein) contained N from 5 mM 15NO3 - at a similar level, about 60% of total N. These results indicate that a) the temporary supply of a high level of NO3 - effectively promoted β-subunit accumulation in N-deficient plants when feeding was carried out after 28 DAF, and b) incorporation of fed NO3 - was similar between 7 Sand 11 S globulins.
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Claims 6
Claim · model-written summary
Under nitrogen sufficiency, beta subunit accumulation began 30 days after flowering.
- Taxon
- soybean
Glycine maxt0 - Outcome
- β-subunit accumulatione0
- Value
- 30 d after flowering (DAF)e0
Not reportedOrgan / stage
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“β-subunit accumulation was first detected at 30 d after flowering (DAF)”
t0“soybean plants”
Claim · model-written summary
Nitrogen deficiency strongly inhibited beta subunit accumulation.
- Taxon
- soybeanGlycine maxt0
- Treatment
- supply of 1 mM NaNO3e0
- Outcome
- accumulation of the β-subunite0
- Direction
- stronglyinhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In N-deficient plants (supply of 1 mM NaNO3), the accumulation of the β-subunit was stronglyinhibited.”
t0“soybean plants”
Claim · model-written summary
Nitrate supplied before 28 DAF did not induce beta subunit accumulation.
- Taxon
- soybeanGlycine maxt0
- Material
- T201e0
- Treatment
- 5 mM 15N-labeled NO3 -e0
- Outcome
- β-subunit protein did not accumulatee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When 5 mM 15N-labeled NO3 - was supplied for 1 week to N-deficient T201 plants before 28 DAF, the β-subunit protein did not accumulate”
t0“soybean plants”
Claim · model-written summary
Nitrate applied after 28 DAF substantially increased beta subunit accumulation.
- Taxon
- soybeanGlycine maxt0
- Treatment
- 5 mM NO3 - after 28 DAFe0
- Outcome
- accumulation of the β-subunite0
- Direction
- substantiale0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of 5 mM NO3 - after 28 DAF, led to a substantial accumulation of the β-subunit”
t0“soybean plants”
Claim · model-written summary
The total nitrogen-15 percentage in mature seeds was similar across feeding times.
- Taxon
- soybeanGlycine maxt0
- Outcome
- total 15N percentage in mature seedse0
- Direction
- similare0
- Comparator
- time of feedinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total 15N percentage in mature seeds was similar, irrespective of the time of feeding”
t0“soybean plants”
Claim · model-written summary
Seven S and 11 S globulins contained similar fed nitrogen levels, about 60 percent of total nitrogen.
- Taxon
- soybeanGlycine maxt0
- Outcome
- contained N from 5 mM 15NO3 -e0
- Direction
- similar levele0
- Value
- 60% of total Ne0
- Comparator
- 7 S (mostly composed of β-conglycinin) and 11 S globulinse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 7 S (mostly composed of β-conglycinin) and 11 S globulins (mostly glycinin, which was another major component of storage protein) contained N from 5 mM 15NO3 - at a similar level, about 60% of total N.”
t0“soybean plants”
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