Abstract
The objective of this study was to examine the role of antioxidant enzymes in waterlogging tolerance of pigeonpea (Cajanus cajan L. Halls) genotypes ICP 301 (tolerant) and Pusa 207 (susceptible). Waterlogging resulted in visible yellowing and senescence of leaves, decrease in leaf area, dry matter, relative water content and chlorophyll content in leaves, and membrane stability index in roots and leaves. The decline in all parameters was greater in Pusa 207 than ICP 301. Oxidative stress in the form of superoxide radical, hydrogen peroxide and thiobarbituric acid reactive substances (TBARS) contents initially decreased, however at 4 and 6 d of waterlogging it increased over control plants, probably due to activation of DPI-sensitive NADPH-oxidase. Antioxidant enzymes such as superoxide dismutase, ascorbate peroxidase, glutathione reductase and catalase also increased under waterlogging. The comparatively greater antioxidant enzyme activities resulting in less oxidative stress in ICP 301 could be one of the factor determining its higher tolerance to flooding as compared to Pusa 207. This study is the first to conclusively prove that waterlogging induced increase in ROS is via NADPH oxidase.
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Claims 10
Claim · model-written summary
Waterlogging caused leaf yellowing and senescence.
- Taxon
- pigeonpea
Cajanus cajane1 - Treatment
- Waterlogginge0
- Outcome
- visible yellowing and senescence of leavese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Waterlogging resulted in visible yellowing and senescence of leaves”
e1“pigeonpea (Cajanus cajan L. Halls)”
Claim · model-written summary
Waterlogging decreased leaf area, dry matter and leaf relative water and chlorophyll contents.
- Taxon
- pigeonpeaCajanus cajane2
- Treatment
- Waterlogginge1
- Outcome
- leaf area, dry matter, relative water content and chlorophyll content in leavese0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decrease in leaf area, dry matter, relative water content and chlorophyll content in leaves”
e1“Waterlogging resulted”
e2“pigeonpea (Cajanus cajan L. Halls)”
Claim · model-written summary
Waterlogging decreased membrane stability in roots and leaves.
- Taxon
- pigeonpeaCajanus cajane2
- Treatment
- Waterlogginge1
- Outcome
- membrane stability index in roots and leavese0
- Direction
- decreasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“membrane stability index in roots and leaves”
e1“Waterlogging resulted in visible yellowing and senescence of leaves, decrease in leaf area, dry matter, relative water content and chlorophyll content in leaves, and membrane stability index in roots and leaves”
e2“pigeonpea (Cajanus cajan L. Halls)”
Claim · model-written summary
These waterlogging-associated declines were greater in Pusa 207 than in ICP 301.
- Taxon
- pigeonpeaCajanus cajane1
- Material
- Pusa 207e0
- Outcome
- decline in all parameterse0
- Direction
- greatere0
- Comparator
- ICP 301e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The decline in all parameters was greater in Pusa 207 than ICP 301”
e1“pigeonpea (Cajanus cajan L. Halls)”
Claim · model-written summary
Superoxide radical, hydrogen peroxide and TBARS contents initially decreased during waterlogging.
- Taxon
- pigeonpeaCajanus cajane1
- Treatment
- Waterlogginge2
- Outcome
- superoxide radical, hydrogen peroxide and thiobarbituric acid reactive substances (TBARS) contentse0
- Direction
- decreasede0
- Qualifier
- initiallye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oxidative stress in the form of superoxide radical, hydrogen peroxide and thiobarbituric acid reactive substances (TBARS) contents initially decreased”
e1“pigeonpea (Cajanus cajan L. Halls)”
e2“Waterlogging”
Claim · model-written summary
At days 4 and 6, those oxidative stress contents increased over controls.
- Taxon
- pigeonpeaCajanus cajane2
- Treatment
- waterlogginge0
- Outcome
- superoxide radical, hydrogen peroxide and thiobarbituric acid reactive substances (TBARS) contentse1
- Direction
- increasede0
- Qualifier
- 4 and 6 de0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“however at 4 and 6 d of waterlogging it increased over control plants”
e1“Oxidative stress in the form of superoxide radical, hydrogen peroxide and thiobarbituric acid reactive substances (TBARS) contents”
e2“pigeonpea (Cajanus cajan L. Halls)”
Claim · model-written summary
Superoxide dismutase, ascorbate peroxidase, glutathione reductase and catalase increased under waterlogging.
- Taxon
- pigeonpeaCajanus cajane1
- Treatment
- waterlogginge0
- Outcome
- superoxide dismutase, ascorbate peroxidase, glutathione reductase and catalasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Antioxidant enzymes such as superoxide dismutase, ascorbate peroxidase, glutathione reductase and catalase also increased under waterlogging”
e1“pigeonpea (Cajanus cajan L. Halls)”
Claim · model-written summary
ICP 301 had greater antioxidant enzyme activity and less oxidative stress than Pusa 207.
- Taxon
- pigeonpeaCajanus cajane1
- Material
- ICP 301e0
- Outcome
- antioxidant enzyme activitiese0
- Direction
- greatere0
- Comparator
- Pusa 207e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The comparatively greater antioxidant enzyme activities resulting in less oxidative stress in ICP 301 could be one of the factor determining its higher tolerance to flooding as compared to Pusa 207”
e1“pigeonpea (Cajanus cajan L. Halls)”
Claim · model-written summary
Greater antioxidant activity and reduced oxidative stress may explain the greater flooding tolerance of ICP 301 relative to Pusa 207.
- Taxon
- pigeonpeaCajanus cajane1
- Material
- ICP 301e0
- Outcome
- higher tolerance to floodinge0
- Qualifier
- greater antioxidant enzyme activities resulting in less oxidative stresse0
- Comparator
- Pusa 207e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The comparatively greater antioxidant enzyme activities resulting in less oxidative stress in ICP 301 could be one of the factor determining its higher tolerance to flooding as compared to Pusa 207”
e1“pigeonpea (Cajanus cajan L. Halls)”
Claim · model-written summary
The authors attribute waterlogging-induced ROS increase to NADPH oxidase.
- Taxon
- pigeonpeaCajanus cajane1
- Treatment
- waterlogginge0
- Gene
- NADPH oxidasee0
- Outcome
- increase in ROSe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study is the first to conclusively prove that waterlogging induced increase in ROS is via NADPH oxidase”
e1“pigeonpea (Cajanus cajan L. Halls)”
The same questions in other papers
flooding · physiology: water · Cajanus cajan (pigeon pea)Results agree
1 paper in the same direction as this paper
- negative
flooding · physiology: antioxidant enzymes · Cajanus cajan (pigeon pea)Results agree
1 paper in the same direction as this paper
- positive
flooding · disease · Cajanus cajan (pigeon pea)Results agree
2 papers in the same direction as this paper
- negative
- negative
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.