Abstract
Recovery of N2-fixing ability (measured by C2H2-C2H4 assay) of greenhouse grown soybean following defoliation by soybean looper, Pseudoplusia includens (Walker) (Lepidoptera: Noctuidae), was examined in two experiments. Experiment 1 examined nodulation, N2 fixation, and dry weight of plant parts of ‘Forrest’ soybean at 0, 2, and 4 wk post defoliation (WPD) (70% defoliation). Experiment 2 examined these same variables in ‘Davis’ soybean at 0, 1, 2, 3, 4, and 5 WPD (73%defoliation). In both experiments, leaf area, stem dry weight, and root dry weight of defoliated plants were greatly reduced at 0 WPD; they never recovered to the level of control plants. Although N2-fixing ability of defoliated plants was reduced 4.9-fold in Experiment 1 and 8.7-fold in Experiment 2 at 0 WPD, there was no significant difference in N2-fixing ability of defoliated and control plants in either experiment at 4 WPD. Recovery of N2-fixing ability was due to partial recovery of total nodule dry weight, combined with complete recovery of nodule specific activity.
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Claims 5
Claim · model-written summary
Defoliated soybean leaf area and stem and root dry weight remained below controls.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- defoliatione1
- Interactor
- Pseudoplusia includens
Chrysodeixis includense1herbivore - Outcome
- leaf area, stem dry weight, and root dry weighte0
- Direction
- greatly reducede0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both experiments, leaf area, stem dry weight, and root dry weight of defoliated plants were greatly reduced at 0 WPD; they never recovered to the level of control plants.”
e1“defoliation by soybean looper, Pseudoplusia includens”
t0“Soybean”
Claim · model-written summary
Defoliation reduced soybean nitrogen fixing ability 4.9 fold in experiment 1.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- defoliatione1
- Interactor
- Pseudoplusia includensChrysodeixis includense1herbivore
- Outcome
- N2-fixing abilitye0
- Direction
- reducede0
- Value
- 4.9-folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N2-fixing ability of defoliated plants was reduced 4.9-fold in Experiment 1 and 8.7-fold in Experiment 2 at 0 WPD”
e1“defoliation by soybean looper, Pseudoplusia includens”
t0“Soybean”
Claim · model-written summary
Defoliation reduced soybean nitrogen fixing ability 8.7 fold in experiment 2.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- defoliatione1
- Interactor
- Pseudoplusia includensChrysodeixis includense1herbivore
- Outcome
- N2-fixing abilitye0
- Direction
- reducede0
- Value
- 8.7-folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N2-fixing ability of defoliated plants was reduced 4.9-fold in Experiment 1 and 8.7-fold in Experiment 2 at 0 WPD”
e1“defoliation by soybean looper, Pseudoplusia includens”
t0“Soybean”
Claim · model-written summary
At four weeks nitrogen fixing ability did not differ significantly between defoliated and control soybean.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- defoliatione1
- Interactor
- Pseudoplusia includensChrysodeixis includense1herbivore
- Outcome
- N2-fixing abilitye0
- Direction
- no significant differencee0
- Qualifier
- 4 WPDe0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no significant difference in N2-fixing ability of defoliated and control plants in either experiment at 4 WPD”
e1“defoliation by soybean looper, Pseudoplusia includens”
t0“Soybean”
Claim · model-written summary
Recovery of soybean nitrogen fixation was attributed to partial nodule dry weight recovery and complete nodule specific activity recovery.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- nodulee0
- Outcome
- Recovery of N2-fixing abilitye0
- Qualifier
- partial recovery of total nodule dry weight, combined with complete recovery of nodule specific activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recovery of N2-fixing ability was due to partial recovery of total nodule dry weight, combined with complete recovery of nodule specific activity.”
t0“Soybean”
The same questions in other papers
pruning · Chrysodeixis includens · Glycine max (soybean)Positive and negative results
4 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
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3 papers more in this group
See all 7 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.