Abstract
Abstract An Fe efficient (Arachis hypogaea L. cv. 71–234) and an Fe inefficient (cv. Tainan 9) peanut cultivar were subjected to four inoculation treatments (NH4NO3 without inoculation, NC 92, TAL 1000 and a mixture of these two Bradyrhizobium sp. (Arachis) strains with THA 205) and grown under Fe stress conditions in complete nutrient solution including 0.2 mM NH4NO3 and 0.012 mM FeEDDHA at pH 8.6 maintained by addition of 5 mM NaHCO3 and solid CaCO3. During the first four weeks, cv. 71–234 grew better than cv. Tainan 9 in all inoculation treatments but by eight weeks these differences had largely disappeared. By contrast, inoculation treatments had no effects on shoot and root dry matter at four weeks but large effects at eight weeks when plants inoculated with NC 92 alone or in a mixture had similar or more dry matter than those given NH4NO3 and double that of those with TAL 1000 alone. At four weeks, both cultivars had 250, 150, and 3 nodules per plant and acetylene reduction rates of 27, 17, <1 nmol/min/plant with NC 92, mixed inoculum, and TAL 1000 respectively: they also had 40, 150, and 1000 nodule initials per plant. At eight weeks both cultivars with TAL 1000 alone had N concentrations in their shoots well below those of all other treatments. Catechol type siderophore activity was present in solutions inoculated with NC 92 alone or in mixed inoculum but absent from those with TAL 1000 alone. It is suggested that strains of Bradyrhizobium sp. differ profoundly in their ability to obtain iron from their environment for development of their symbiotic systems in peanut.
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Claims 12
Claim · model-written summary
At four weeks, cv. 71–234 grew better than cv. Tainan 9 across inoculation treatments.
Verbatim
e0“During the first four weeks, cv. 71–234 grew better than cv. Tainan 9 in all inoculation treatments”
Claim · model-written summary
By eight weeks the cultivar growth differences had largely disappeared.
- Taxon
- peanut
Arachis hypogaeat0 - Outcome
- differences had largely disappearede0
- Direction
- largely disappearede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by eight weeks these differences had largely disappeared”
t0“peanut”
Claim · model-written summary
Inoculation treatments had no effect on shoot and root dry matter at four weeks.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- inoculation treatmentse0
- Outcome
- shoot and root dry mattere0
- Direction
- no effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation treatments had no effects on shoot and root dry matter at four weeks”
t0“peanut”
Claim · model-written summary
At eight weeks, NC 92 alone or mixed inoculum yielded at least as much dry matter as NH4NO3 and twice that of TAL 1000 alone.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- NC 92 alone or in a mixturee0
- Interactor
- NC 92e0symbiont
- Outcome
- dry mattere0
- Direction
- doublee0
- Value
- doublee0
- Comparator
- TAL 1000 alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants inoculated with NC 92 alone or in a mixture had similar or more dry matter than those given NH4NO3 and double that of those with TAL 1000 alone”
t0“peanut”
Claim · model-written summary
At four weeks NC 92 gave 250 nodules per plant.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- nodules per plante0
- Value
- 250e0
- Qualifier
- both cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both cultivars had 250, 150, and 3 nodules per plant”
t0“peanut”
Claim · model-written summary
At four weeks mixed inoculum gave 150 nodules per plant.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- nodules per plante0
- Value
- 150e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both cultivars had 250, 150, and 3 nodules per plant”
t0“peanut”
Claim · model-written summary
At four weeks TAL 1000 gave 3 nodules per plant.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- nodules per plante0
- Value
- 3 nodules per plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both cultivars had 250, 150, and 3 nodules per plant”
t0“peanut”
Claim · model-written summary
At four weeks acetylene reduction rates were 27, 17 and less than 1 nmol/min/plant for NC 92, mixed inoculum and TAL 1000 respectively.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- acetylene reduction ratese0
- Value
- 27, 17, <1 nmol/min/plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“acetylene reduction rates of 27, 17, <1 nmol/min/plant with NC 92, mixed inoculum, and TAL 1000 respectively”
t0“peanut”
Claim · model-written summary
At four weeks the corresponding nodule initials numbered 40, 150 and 1000 per plant.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- nodule initials per plante0
- Value
- 40, 150, and 1000 nodule initials per plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“40, 150, and 1000 nodule initials per plant”
t0“peanut”
Claim · model-written summary
At eight weeks TAL 1000 plants had lower shoot nitrogen concentration than other treatments.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- TAL 1000 alonee0
- Interactor
- TAL 1000e0symbiont
- Outcome
- N concentrations in their shootse0
- Direction
- well belowe0
- Comparator
- all other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both cultivars with TAL 1000 alone had N concentrations in their shoots well below those of all other treatments”
t0“peanut”
Claim · model-written summary
Catechol type siderophore activity occurred with NC 92 alone or mixed inoculum and was absent with TAL 1000 alone.
- Taxon
- peanutArachis hypogaeat0
- Interactor
- NC 92e0symbiont
- Outcome
- Catechol type siderophore activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Catechol type siderophore activity was present in solutions inoculated with NC 92 alone or in mixed inoculum but absent from those with TAL 1000 alone”
t0“peanut”
Claim · model-written summary
The authors suggest that Bradyrhizobium strains differ in acquiring iron for symbiotic development in peanut.
- Taxon
- peanutArachis hypogaeae0
- Interactor
- Bradyrhizobium sp.
Bradyrhizobiume0symbiont - Outcome
- development of their symbiotic systems in peanute0
- Qualifier
- ability to obtain iron from their environmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strains of Bradyrhizobium sp. differ profoundly in their ability to obtain iron from their environment for development of their symbiotic systems in peanut”
The same questions in other papers
inoculation · growth · Arachis hypogaea (peanut)Positive and negative results
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See all 119 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.