Abstract
Abstract The effects of nitrogen fertilization and N2 fixation on the accumulation of ureides, allantoin and allantoic acid, were investigated using soybeans (Glycine max L.) cultured by hydroponics during the vegetative growth. Application of nitrogen in the form of urea or ammonium and in some cases nitrate at 20 mM N increased the ureide concentration in plant tissues but not in xylem sap. The ureide concentration in the xylem sap was greater when the N2-fixing activity of the nodules was higher, whereas the ureide concentration in the tissues was rather related to the nitrogen content of the tissues, although these relationships were not so strict. The leaf tissues supplied with glutamine, ammonium nitrate, urea, or glycine through their petioles were able to synthesize ureides. These results indicate that host plant tissues and nodules have the ability to produce ureides upon supply of N as combined. N or fixed-N and that the main source of ureides transported in xylem streams is that produced in the nodules. The ureide concentration in the xylem sap may be a better indicator of N2-fixing activity than the ureide concentration in plant tissues. Key Words: nitrogen fertilizationN2 fixationsoybeanureide accumulation
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 7
Claim · model-written summary
Applying nitrogen as urea or ammonium (and in some cases nitrate) at 20 mM N increased the ureide concentration in soybean plant tissues.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- nitrogen in the form of urea or ammonium and in some cases nitrate at 20 mM Ne0
- Outcome
- ureide concentration in plant tissuese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Plants”
e0“Application of nitrogen in the form of urea or ammonium and in some cases nitrate at 20 mM N increased the ureide concentration in plant tissues but not in xylem sap”
Claim · model-written summary
The same nitrogen applications did not increase the ureide concentration in soybean xylem sap.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- xylem sape0
- Treatment
- nitrogen in the form of urea or ammonium and in some cases nitrate at 20 mM Ne0
- Outcome
- ureide concentratione0
- Direction
- not in xylem sape0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Plants”
e0“Application of nitrogen in the form of urea or ammonium and in some cases nitrate at 20 mM N increased the ureide concentration in plant tissues but not in xylem sap”
Claim · model-written summary
Ureide concentration in soybean xylem sap was greater when the N2-fixing activity of the nodules was higher.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- nodulese0
- Outcome
- ureide concentration in the xylem sape0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Plants”
e0“The ureide concentration in the xylem sap was greater when the N2-fixing activity of the nodules was higher”
Claim · model-written summary
Ureide concentration in soybean tissues was rather related to the nitrogen content of the tissues, although the relationships were not strict.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- tissuese0
- Outcome
- ureide concentration in the tissuese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Plants”
e0“the ureide concentration in the tissues was rather related to the nitrogen content of the tissues”
Claim · model-written summary
Soybean leaf tissues supplied with glutamine, ammonium nitrate, urea, or glycine through their petioles were able to synthesize ureides.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- leaf tissuese0
- Treatment
- supplied with glutamine, ammonium nitrate, urea, or glycinee0
- Outcome
- synthesize ureidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Plants”
e0“The leaf tissues supplied with glutamine, ammonium nitrate, urea, or glycine through their petioles were able to synthesize ureides”
Claim · model-written summary
The authors conclude that the main source of ureides transported in soybean xylem is that produced in the nodules.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- nodulese0
- Outcome
- ureides transported in xylem streamse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Plants”
e0“the main source of ureides transported in xylem streams is that produced in the nodules”
Claim · model-written summary
The authors suggest that ureide concentration in xylem sap may be a better indicator of N2-fixing activity than ureide concentration in plant tissues.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- a better indicator of N2-fixing activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Plants”
e0“The ureide concentration in the xylem sap may be a better indicator of N2-fixing activity than the ureide concentration in plant tissues”
The same questions in other papers
nitrogen · molecular: metabolites · Glycine max (soybean)Results differ
36 papers in the same direction as this paper · 42 in the opposite direction · 2 reporting no difference from an alternative
- no effect
- no effect
- negative
77 papers more in this group
See all 81 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.