Abstract
Water stress‐induced spikelet sterility limits rice production under upland conditions. The causes of spikelet sterility under drought stress are poorly understood. In this study the role of antioxidant defence management in drought‐induced spikelet sterility was investigated in two rice ( Oryza sativa ) genotypes differing in drought resistance. Drought‐resistant N22 genotype showed less water stress‐induced spikelet sterility when compared to the susceptible N118 genotype under upland conditions. The N22 panicles maintained higher RWC and turgor potential and lower H 2 O 2 levels across the developmental stages under water stress than that of N118 panicles. Drought‐induced enhancement in superoxide dismutase (SOD, EC 1.15.1.1) activity coupled with higher ascorbate (AsA), glutathione (GSH) content and enhanced ascorbate peroxidase (APX, EC 1.11.1.11) and glutathione reductase (GR, EC 1.6.4.2) activities resulted in lower H 2 O 2 levels in N22 panicles. In contrast, insufficient enhancement in SOD, APX and GR activities resulted in relatively higher H 2 O 2 levels under water stress in N118 panicles. The N22 panicles exhibited a higher number of SOD and APX isozymes in comparison with N118 panicles that might provide better reactive oxygen species scavenging. Hence it is concluded that well‐equipped antioxidant defence plays an important role in minimizing water stress‐induced spikelet sterility in upland rice.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
N22 had less water stress-induced spikelet sterility than N118.
- Taxon
- rice
Oryza sativat0 - Material
- N22e0
- Outcome
- water stress‐induced spikelet sterilitye0
- Direction
- lesse0
- Comparator
- N118e0
- Setting
- upland conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought‐resistant N22 genotype showed less water stress‐induced spikelet sterility when compared to the susceptible N118 genotype under upland conditions.”
t0“rice”
t1“rice”
Claim · model-written summary
N22 panicles maintained higher RWC and turgor potential than N118 under stress.
- Taxon
- riceOryza sativat0
- Material
- N22e0
- Organ / stage
- paniclese0
- Outcome
- RWC and turgor potentiale0
- Direction
- highere0
- Qualifier
- under water stresse0
- Comparator
- N118e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N22 panicles maintained higher RWC and turgor potential and lower H 2 O 2 levels across the developmental stages under water stress than that of N118 panicles.”
t0“rice”
t1“rice”
Claim · model-written summary
N22 panicles had lower H 2 O 2 levels than N118 under stress.
- Taxon
- riceOryza sativat0
- Material
- N22e0
- Organ / stage
- paniclese0
- Outcome
- H 2 O 2 levelse0
- Direction
- lowere0
- Qualifier
- under water stresse0
- Comparator
- N118e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N22 panicles maintained higher RWC and turgor potential and lower H 2 O 2 levels across the developmental stages under water stress than that of N118 panicles.”
t0“rice”
t1“rice”
Claim · model-written summary
Drought enhanced SOD activity in N22 panicles.
- Taxon
- riceOryza sativat0
- Material
- N22e1
- Treatment
- Droughte0
- Outcome
- superoxide dismutase (SOD, EC 1.15.1.1) activitye0
- Direction
- enhancemente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought‐induced enhancement in superoxide dismutase (SOD, EC 1.15.1.1) activity”
t0“rice”
t1“rice”
e1“Drought‐induced enhancement in superoxide dismutase (SOD, EC 1.15.1.1) activity coupled with higher ascorbate (AsA), glutathione (GSH) content and enhanced ascorbate peroxidase (APX, EC 1.11.1.11) and glutathione reductase (GR, EC 1.6.4.2) activities resulted in lower H 2 O 2 levels in N22 panicles.”
Claim · model-written summary
Higher AsA and GSH content and APX and GR activities contributed to lower H 2 O 2 in N22 panicles.
- Taxon
- riceOryza sativat0
- Material
- N22e0
- Organ / stage
- paniclese0
- Compound
- ascorbate (AsA)e0
- Outcome
- H 2 O 2 levelse0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher ascorbate (AsA), glutathione (GSH) content and enhanced ascorbate peroxidase (APX, EC 1.11.1.11) and glutathione reductase (GR, EC 1.6.4.2) activities resulted in lower H 2 O 2 levels in N22 panicles.”
t0“rice”
t1“rice”
Claim · model-written summary
Insufficient SOD, APX and GR enhancement led to higher H 2 O 2 in N118 panicles.
- Taxon
- riceOryza sativat0
- Material
- N118e0
- Organ / stage
- paniclese0
- Gene
- SOD, APX and GRe0
- Outcome
- H 2 O 2 levelse0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“insufficient enhancement in SOD, APX and GR activities resulted in relatively higher H 2 O 2 levels under water stress in N118 panicles.”
t0“rice”
t1“rice”
Claim · model-written summary
N22 had more SOD and APX isozymes than N118.
- Taxon
- riceOryza sativat0
- Material
- N22e0
- Organ / stage
- paniclese0
- Outcome
- number of SOD and APX isozymese0
- Direction
- highere0
- Comparator
- N118e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N22 panicles exhibited a higher number of SOD and APX isozymes in comparison with N118 panicles”
t0“rice”
t1“rice”
The same questions in other papers
drought · physiology: antioxidant enzymes · Oryza sativa (rice)Results differ
23 papers in the same direction as this paper · 10 in the opposite direction
- negative
- negative
- negative
30 papers more in this group
See all 34 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.