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 11
Claim · model-written summary
Up to 24 mg nitrogen per plant at sowing little restricted fixation in effectively nodulated Vigna.
- Taxon
- Vigna sinesise0
- Treatment
- ammonium nitrate up to 24 mg nitrogen per plante0
- Outcome
- Nitrogen fixatione0
- Direction
- little restrictede0
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
The two Vigna associations had different growth responses 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
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.”
t0“Vigna sinensis”
Claim · model-written summary
Small combined-nitrogen doses may stimulate fixation by the V. sinensis-SU318 association.
- Taxon
- V. sinensisVigna unguiculata subsp. unguiculatae0
- Treatment
- small doses of combined nitrogene0
- 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 Vicia fixation.
Not reportedComparator
Verbatim
e0“for Vicia atvopurpurea all the combined nitrogen levels used in these experiments depressed fixation.”
Claim · model-written summary
Nitrogen compound form and amount influenced primary-root nodulation.
- Taxon
- V. atropurpurea
Vicia benghalensise0 - Treatment
- nitrogen compounde0
- 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 also influenced Vicia nodulation.
- Taxon
- V. atropurpureaVicia benghalensise0
- Outcome
- V. atropurpureae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“that of V. atropurpurea is also influenced by the Rhizobium strain.”
Claim · model-written summary
Combined nitrogen restricted primary-root nodulation on both hosts, while urea had little effect on Vicia.
Not reportedComparator
Verbatim
e0“These forms of combined nitrogen restrict primary root nodulation on both hosts similarly except that urea has little effect on V. atuopurpurea.”
Claim · model-written summary
Both species formed more secondary-root than primary-root nodules.
- Taxon
- Vigna sinensis and Vicia atropurpureaVigna unguiculata subsp. unguiculataVicia benghalensist0
- Organ / stage
- secondary rootse0
- Outcome
- nodulese0
- Direction
- moree0
- Comparator
- primarye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both species many more nodules formed on the secondary roots than on the primary”
t0“Vigna sinensis and Vicia atropurpurea”
Claim · model-written summary
Combined nitrogen had little effect on secondary-root nodule numbers.
- Taxon
- Vigna sinensis and Vicia atropurpureaVigna unguiculata subsp. unguiculataVicia benghalensist0
- 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
e0“numbers of secondary root nodules are little affected by the combined nitrogen.”
t0“Vigna sinensis and Vicia atropurpurea”
Claim · model-written summary
Leaf immersion in combined nitrogen depressed Vigna nodulation.
- Taxon
- V. sinensisVigna unguiculata subsp. unguiculatae0
- 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
Leaf-applied urea slightly increased Vigna top dry weight.
- 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
e0“but urea slightly increased the dry weight of tops.”
t0“Vigna sinensis”
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