Abstract
Short-term waterlogging often occurs in upland fields converted from paddies in Japan, since paddy fields have poor surface drainage and a high water table. The objective of this study was to clarify the effects of different durations of waterlogging (W) and waterlogging with soil reduction (WR) on soybean nitrogen fixation at different soil temperatures. Acetylene reduction activity (ARA) was reduced by W treatment for 3, 5 and 7 days (d), ARA was restored to the same level as in the control (C) at 3 days after the end of the treatment (DAT). However, ARA reduced by the WR treatment for 3, 5 and 7 d in a greenhouse was not restored. In the experiments under three soil temperature conditions (lower than 30ºC, around 34ºC and higher than 36ºC) and with two waterlogging durations (3 and 5d) in the growth chamber, ARA reduced by the W treatment was restored after the treatment irrespective of soil temperature and waterlogging duration whereas ARA reduced by WR was restored only after the short-term waterlogging at a low soil temperature. The nodule dry weight and respiration rate of the root system significantly decreased when ARA was greatly reduced. In addition, ARA at 3 DAT was positively correlated with stomatal conductance (SC) at 4 DAT. We concluded that the recovery of nodule nitrogen fixation from the reduction by waterlogging is strongly affected by the oxidation-reduction potential and temperature of the soil, and the nodule damage could be evaluated by SC.
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Claims 8
Claim · model-written summary
W treatment for 3, 5 and 7 days reduced acetylene reduction activity in soybean relative to the control.
- Taxon
- soybean
Glycine maxe0 - Treatment
- W treatment for 3, 5 and 7 dayse1
- Outcome
- Acetylene reduction activity (ARA)e1
- Direction
- reducede1
- Comparator
- control (C)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The objective of this study was to clarify the effects of different durations of waterlogging (W) and waterlogging with soil reduction (WR) on soybean nitrogen fixation at different soil temperatures”
e1“Acetylene reduction activity (ARA) was reduced by W treatment for 3, 5 and 7 days (d)”
e2“ARA was restored to the same level as in the control (C) at 3 days after the end of the treatment (DAT)”
Claim · model-written summary
Acetylene reduction activity reduced by W treatment was restored to the control level 3 days after the treatment ended.
- Taxon
- soybeanGlycine maxe0
- Treatment
- W treatmente1
- Outcome
- ARAe2
- Direction
- restored to the same levele2
- Comparator
- control (C)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The objective of this study was to clarify the effects of different durations of waterlogging (W) and waterlogging with soil reduction (WR) on soybean nitrogen fixation at different soil temperatures”
e1“Acetylene reduction activity (ARA) was reduced by W treatment for 3, 5 and 7 days (d)”
e2“ARA was restored to the same level as in the control (C) at 3 days after the end of the treatment (DAT)”
Claim · model-written summary
ARA reduced by WR treatment for 3, 5 and 7 days was not restored in a greenhouse.
- Taxon
- soybeanGlycine maxe0
- Treatment
- WR treatment for 3, 5 and 7 de1
- Outcome
- ARAe1
- Direction
- not restorede1
- Setting
- a greenhousee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The objective of this study was to clarify the effects of different durations of waterlogging (W) and waterlogging with soil reduction (WR) on soybean nitrogen fixation at different soil temperatures”
e1“ARA reduced by the WR treatment for 3, 5 and 7 d in a greenhouse was not restored”
Claim · model-written summary
ARA reduced by WR was restored only after short-term waterlogging at a low soil temperature.
- Taxon
- soybeanGlycine maxe0
- Treatment
- short-term waterlogging at a low soil temperaturee1
- Outcome
- ARAe1
- Direction
- restorede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The objective of this study was to clarify the effects of different durations of waterlogging (W) and waterlogging with soil reduction (WR) on soybean nitrogen fixation at different soil temperatures”
e1“ARA reduced by WR was restored only after the short-term waterlogging at a low soil temperature”
Claim · model-written summary
Nodule dry weight and root system respiration rate significantly decreased in soybean when ARA was greatly reduced.
- Taxon
- soybeanGlycine maxe0
- Organ / stage
- root systeme1
- Outcome
- nodule dry weight and respiration rate of the root systeme1
- Direction
- decreasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The objective of this study was to clarify the effects of different durations of waterlogging (W) and waterlogging with soil reduction (WR) on soybean nitrogen fixation at different soil temperatures”
e1“The nodule dry weight and respiration rate of the root system significantly decreased when ARA was greatly reduced”
Claim · model-written summary
ARA at 3 DAT was positively correlated with stomatal conductance at 4 DAT in soybean.
- Taxon
- soybeanGlycine maxe0
- Treatment
- ARA at 3 DATe1
- Outcome
- stomatal conductance (SC)e1
- Direction
- positivelye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The objective of this study was to clarify the effects of different durations of waterlogging (W) and waterlogging with soil reduction (WR) on soybean nitrogen fixation at different soil temperatures”
e1“ARA at 3 DAT was positively correlated with stomatal conductance (SC) at 4 DAT”
Claim · model-written summary
Recovery of nodule nitrogen fixation is strongly affected by soil oxidation-reduction potential and temperature.
- Taxon
- soybeanGlycine maxe0
- Treatment
- oxidation-reduction potential and temperature of the soile1
- Outcome
- recovery of nodule nitrogen fixatione1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The objective of this study was to clarify the effects of different durations of waterlogging (W) and waterlogging with soil reduction (WR) on soybean nitrogen fixation at different soil temperatures”
e1“the recovery of nodule nitrogen fixation from the reduction by waterlogging is strongly affected by the oxidation-reduction potential and temperature of the soil”
Claim · model-written summary
Nodule damage in soybean could be evaluated by stomatal conductance.
- Taxon
- soybeanGlycine maxe0
- Outcome
- the nodule damage could be evaluated by SCe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The objective of this study was to clarify the effects of different durations of waterlogging (W) and waterlogging with soil reduction (WR) on soybean nitrogen fixation at different soil temperatures”
e1“the nodule damage could be evaluated by SC”
The same questions in other papers
flooding · symbiosis · Glycine max (soybean)Positive and negative results
4 papers in the same direction as this paper · 14 in the opposite direction
- negative
- negative
- negative
15 papers more in this group
See all 19 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.