Abstract
Nitrogen fixation by Vigna sinesis nodulated effectively either by Rhizobium strain QA323 or by strain CB441 is little restricted by applications at sowing of ammonium nitrate up to 24 mg nitrogen per plant. The growth patterns of these two associations are differentially affected by nitrogen level, and are both considerably different from that of unnodulated plants given combined nitrogen. Nitrogen fixation by V. sinensis-strain SU318 may be stimulated by small doses of combined nitrogen at sowing, but for Vicia atvopurpurea all the combined nitrogen levels used in these experiments depressed fixation. Primary root nodulation of V. atropurpurea by the effective Rhizobium strain V27E and the ineffective strain NA6, and of V. sinensis by the effective Rhizobium strain SU318, is influenced by the form and amount of the nitrogen compound applied (ammonium nitrate, potassium nitrate, ammonium sulphate, or urea), and that of V. atropurpurea is also influenced by the Rhizobium strain. These forms of combined nitrogen restrict primary root nodulation on both hosts similarly except that urea has little effect on V. atuopurpurea. In both species many more nodules formed on the secondary roots than on the primary, but numbers of secondary root nodules are little affected by the combined nitrogen. Immersion of the first leaves of V. sinensis seedlings in solutions of combined nitrogen depressed nodulation, but urea slightly increased the dry weight of tops.
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Claims 13
Claim · model-written summary
Nitrogen fixation in Vigna sinesis with QA323 or CB441 was little restricted by ammonium nitrate up to 24 mg nitrogen per plant at sowing.
- Taxon
- Vigna sinesise0
- Treatment
- applications at sowing of ammonium nitrate up to 24 mg nitrogen per plante0
- Outcome
- Nitrogen fixatione0
- Direction
- little restrictede0
- Value
- 24 mg nitrogen per plante0
RhizobiumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen fixation by Vigna sinesis nodulated effectively either by Rhizobium strain QA323 or by strain CB441 is little restricted by applications at sowing of ammonium nitrate up to 24 mg nitrogen per plant.”
Claim · model-written summary
Growth patterns of the two Vigna–Rhizobium associations responded differently to nitrogen level.
- Taxon
- Vigna sinensis
Vigna unguiculata subsp. unguiculatat0 - Treatment
- nitrogen levele0
- Outcome
- growth patternse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vigna sinensis”
e0“The growth patterns of these two associations are differentially affected by nitrogen level”
Claim · model-written summary
The growth patterns of the two associations differed considerably from unnodulated plants supplied combined nitrogen.
- Taxon
- Vigna sinensisVigna unguiculata subsp. unguiculatat0
- Outcome
- growth patternse0
- Direction
- considerably differente0
- Comparator
- unnodulated plants given combined nitrogene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vigna sinensis and Vicia atropurpurea”
e0“The growth patterns of these two associations are differentially affected by nitrogen level, and are both considerably different from that of unnodulated plants given combined nitrogen.”
Claim · model-written summary
Small combined nitrogen doses at sowing may stimulate fixation in V. sinensis with SU318.
- Taxon
- V. sinensisVigna unguiculata subsp. unguiculatae0
- Treatment
- small doses of combined nitrogen at sowinge0
- Interactor
- strain SU318e0symbiont
- Outcome
- Nitrogen fixatione0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen fixation by V. sinensis-strain SU318 may be stimulated by small doses of combined nitrogen at sowing”
Claim · model-written summary
All tested combined nitrogen levels depressed fixation in Vicia.
- Taxon
- Vicia atvopurpureae0
- Treatment
- all the combined nitrogen levels used in these experimentse0
- Outcome
- fixatione0
- Direction
- depressede0
Not reportedComparator
Verbatim
e0“but for Vicia atvopurpurea all the combined nitrogen levels used in these experiments depressed fixation.”
Claim · model-written summary
Form and amount of nitrogen compound affected primary root nodulation of both hosts.
- Taxon
- V. atropurpurea
Vicia benghalensise0 - Organ / stage
- Primary roote0
- Treatment
- form and amount of the nitrogen compound appliede0
- Outcome
- Primary root nodulatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Primary root nodulation of V. atropurpurea by the effective Rhizobium strain V27E and the ineffective strain NA6, and of V. sinensis by the effective Rhizobium strain SU318, is influenced by the form and amount of the nitrogen compound applied (ammonium nitrate, potassium nitrate, ammonium sulphate, or urea)”
Claim · model-written summary
Rhizobium strain affected V. atropurpurea primary root nodulation.
- Taxon
- V. atropurpureaVicia benghalensise0
- Outcome
- thate0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“and that of V. atropurpurea is also influenced by the Rhizobium strain.”
Claim · model-written summary
Combined nitrogen forms restricted primary root nodulation similarly in both hosts.
- Taxon
- Vigna sinensisVigna unguiculata subsp. unguiculatat0
- Treatment
- forms of combined nitrogene0
- Outcome
- primary root nodulatione0
- Direction
- restricte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vigna sinensis and Vicia atropurpurea”
e0“These forms of combined nitrogen restrict primary root nodulation on both hosts similarly”
Claim · model-written summary
Urea had little effect on V. atuopurpurea primary root nodulation.
Not reportedComparator
Verbatim
e0“except that urea has little effect on V. atuopurpurea.”
Claim · model-written summary
Both species formed many more nodules on secondary roots than primary roots.
- Taxon
- Vigna sinensisVigna unguiculata subsp. unguiculatat0
- Organ / stage
- secondary rootse0
- Outcome
- nodulese0
- Direction
- many moree0
- Comparator
- primarye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vigna sinensis and Vicia atropurpurea”
e0“In both species many more nodules formed on the secondary roots than on the primary”
Claim · model-written summary
Combined nitrogen little affected secondary-root nodule numbers in both species.
- Taxon
- Vigna sinensisVigna unguiculata subsp. unguiculatat0
- Treatment
- combined nitrogene0
- Outcome
- numbers of secondary root nodulese0
- Direction
- little affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vigna sinensis and Vicia atropurpurea”
e0“but numbers of secondary root nodules are little affected by the combined nitrogen.”
Claim · model-written summary
Immersing first V. sinensis seedling leaves in combined nitrogen depressed nodulation.
- Taxon
- V. sinensisVigna unguiculata subsp. unguiculatae0
- Organ / stage
- first leavese0
- Treatment
- Immersion of the first leaves of V. sinensis seedlings in solutions of combined nitrogene0
- Outcome
- nodulatione0
- Direction
- depressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Immersion of the first leaves of V. sinensis seedlings in solutions of combined nitrogen depressed nodulation”
Claim · model-written summary
Urea slightly increased top dry weight of V. sinensis seedlings.
- Taxon
- Vigna sinensisVigna unguiculata subsp. unguiculatat0
- Treatment
- ureae0
- Outcome
- dry weight of topse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vigna sinensis”
e0“but urea slightly increased the dry weight of tops.”
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