Abstract
Plants display a series of tolerance mechanism following exposure to low-oxygen stress. Increased secretion of end production of carbohydrate catabolism and synthesis of stress-related proteins are important mechanisms enabling the plant to develop tolerance to anoxia stress. In this study, the secretion of lactate and the activity of plasma membrane H+-ATPase in a wild-type (WTS) and a cultivated soybean (CTS) were investigated in response to low-oxygen stress. Low oxygen (0.1% O2, anoxia) increased the secretion of lactate and reduced the activity of plasma membrane H+-ATPase and ATP content in a time-dependent manner. WTS showed greater root elongation and higher survivability than CTS. The higher lactate secretion coincided with the lower accumulation of lactate in WTS than in CTS. Anoxia decreased the cellular pH in soybean roots. Hypoxia (5% O2) increased the secretion of lactate and the activity of plasma membrane H+-ATPase. In comparison to anoxia, hypoxia stress induced increases of 57.4 and 29.7% of endogenous abscisic acid (ABA) in the root apices of WTS and CTS, respectively. Exogenous application of ABA showed a stimulatory effect on the activity of plasma membrane H+-ATPase and the secretion of citrate from soybean roots. However, cycloheximide, an inhibitor of protein synthesis, abolished ABA effects. These results suggest that the modulation of the secretion of lactate and activity of plasma membrane H+-ATPase in soybean roots is associated with the mechanisms of tolerance to low-oxygen stress. ABA might be involved in the hypoxia signal transmitted in soybean roots.
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Claims 13
Claim · model-written summary
Anoxia increased lactate secretion in soybean roots in a time-dependent manner.
- Taxon
- soybean
Glycine maxe1 - Treatment
- Low oxygen (0.1% O2, anoxia)e2
- Outcome
- secretion of lactatee2
- Direction
- increasede2
- Qualifier
- in a time-dependent mannere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“a wild-type (WTS) and a cultivated soybean (CTS)”
e2“Low oxygen (0.1% O2, anoxia) increased the secretion of lactate and reduced the activity of plasma membrane H+-ATPase and ATP content in a time-dependent manner”
Claim · model-written summary
Anoxia reduced the activity of plasma membrane H+-ATPase and ATP content in soybean roots in a time-dependent manner.
- Taxon
- soybeanGlycine maxe1
- Treatment
- Low oxygen (0.1% O2, anoxia)e2
- Outcome
- activity of plasma membrane H+-ATPase and ATP contente2
- Direction
- reducede2
- Qualifier
- in a time-dependent mannere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“a wild-type (WTS) and a cultivated soybean (CTS)”
e2“Low oxygen (0.1% O2, anoxia) increased the secretion of lactate and reduced the activity of plasma membrane H+-ATPase and ATP content in a time-dependent manner”
Claim · model-written summary
Anoxia decreased the cellular pH in soybean roots.
- Taxon
- soybeanGlycine maxe5
- Organ / stage
- rootse5
- Treatment
- Anoxiae5
- Outcome
- cellular pHe5
- Direction
- decreasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Anoxia decreased the cellular pH in soybean roots”
Claim · model-written summary
The wild-type soybean WTS had greater root elongation than the cultivated CTS.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“a wild-type (WTS) and a cultivated soybean (CTS)”
e3“WTS showed greater root elongation and higher survivability than CTS”
Claim · model-written summary
The wild-type soybean WTS had higher survivability than the cultivated CTS.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“a wild-type (WTS) and a cultivated soybean (CTS)”
e3“WTS showed greater root elongation and higher survivability than CTS”
Claim · model-written summary
The higher lactate secretion coincided with lower lactate accumulation in WTS than in CTS.
- Taxon
- soybeanGlycine maxe1
- Material
- WTSe4
- Outcome
- accumulation of lactatee4
- Direction
- lowere4
- Qualifier
- higher lactate secretion coincidede4
- Comparator
- CTSe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“a wild-type (WTS) and a cultivated soybean (CTS)”
e4“The higher lactate secretion coincided with the lower accumulation of lactate in WTS than in CTS”
Claim · model-written summary
Hypoxia increased the secretion of lactate and the activity of plasma membrane H+-ATPase in soybean roots.
- Taxon
- soybeanGlycine maxe1
- Treatment
- Hypoxia (5% O2)e6
- Outcome
- secretion of lactate and the activity of plasma membrane H+-ATPasee6
- Direction
- increasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“a wild-type (WTS) and a cultivated soybean (CTS)”
e6“Hypoxia (5% O2) increased the secretion of lactate and the activity of plasma membrane H+-ATPase”
Claim · model-written summary
Hypoxia stress induced an increase of 57.4 in endogenous ABA in root apices of WTS compared with anoxia.
- Taxon
- soybeanGlycine maxe1
- Material
- WTSe7
- Organ / stage
- root apicese7
- Treatment
- hypoxia stresse7
- Outcome
- endogenous abscisic acid (ABA)e7
- Direction
- increasese7
- Value
- 57.4e7
- Comparator
- anoxiae7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“a wild-type (WTS) and a cultivated soybean (CTS)”
e7“In comparison to anoxia, hypoxia stress induced increases of 57.4 and 29.7% of endogenous abscisic acid (ABA) in the root apices of WTS and CTS, respectively”
Claim · model-written summary
Hypoxia stress induced an increase of 29.7% in endogenous ABA in root apices of CTS compared with anoxia.
- Taxon
- soybeanGlycine maxe1
- Material
- CTSe7
- Organ / stage
- root apicese7
- Treatment
- hypoxia stresse7
- Outcome
- endogenous abscisic acid (ABA)e7
- Direction
- increasese7
- Value
- 29.7%e7
- Comparator
- anoxiae7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“a wild-type (WTS) and a cultivated soybean (CTS)”
e7“In comparison to anoxia, hypoxia stress induced increases of 57.4 and 29.7% of endogenous abscisic acid (ABA) in the root apices of WTS and CTS, respectively”
Claim · model-written summary
Exogenous ABA stimulated the activity of plasma membrane H+-ATPase and citrate secretion from soybean roots.
- Taxon
- soybeanGlycine maxe0
- Organ / stage
- rootse0
- Treatment
- Exogenous application of ABAe0
- Outcome
- activity of plasma membrane H+-ATPase and the secretion of citratee0
- Direction
- stimulatorye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous application of ABA showed a stimulatory effect on the activity of plasma membrane H+-ATPase and the secretion of citrate from soybean roots”
Claim · model-written summary
Cycloheximide, an inhibitor of protein synthesis, abolished the effects of ABA in soybean.
- Taxon
- soybeanGlycine maxe0
- Treatment
- cycloheximide, an inhibitor of protein synthesise1
- Outcome
- ABA effectse1
- Direction
- abolishede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a wild-type (WTS) and a cultivated soybean (CTS)”
e1“cycloheximide, an inhibitor of protein synthesis, abolished ABA effects”
Claim · model-written summary
The modulation of lactate secretion and H+-ATPase activity in soybean roots is associated with tolerance to low-oxygen stress.
- Taxon
- soybeanGlycine maxe0
- Organ / stage
- rootse0
- Treatment
- low-oxygen stresse0
- Outcome
- modulation of the secretion of lactate and activity of plasma membrane H+-ATPasee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results suggest that the modulation of the secretion of lactate and activity of plasma membrane H+-ATPase in soybean roots is associated with the mechanisms of tolerance to low-oxygen stress”
Claim · model-written summary
ABA might be involved in the hypoxia signal transmitted in soybean roots.
- Taxon
- soybeanGlycine maxe0
- Organ / stage
- rootse0
- Compound
- ABAe0
- Outcome
- hypoxia signale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA might be involved in the hypoxia signal transmitted in soybean roots”
The same questions in other papers
flooding · molecular: metabolites · Glycine max (soybean)Positive and negative results
3 papers in the same direction as this paper · 12 in the opposite direction
- negative
- negative
- negative
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See all 16 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.