Abstract
Responses of eight upland rice (Oryza sativa L.) varieties subjected to different drought levels were investigated in laboratory to evaluate eight local upland rice varieties against five drought levels (0, -2, -4, -6, and -8 bars) at germination and early seedling growth stage of plant development. Data were analyzed statistically for growth parameters; shoot length, root length, and dry matter yield, and biochemical parameters; proline and antioxidant enzymes activity (catalase, superoxide dismutase and peroxidase), were measured. Experiment units were arranged factorial completely randomized design with four replications. The drought-tolerant variety, Pulot Wangi tolerated PEG at the highest drought level (-8 bar) and showed no significantly difference relation to control. However, drought-sensitive variety, Kusam was markedly affected even at the lowest drought level used. Concomitantly, the activity of antioxidant enzymes catalase, peroxidase and superoxide dismutase in the drought-tolerant varieties increased markedly during drought stress, while decreased by drought stress in the drought sensitive variety. Consequently, this led to a marked difference in the accumulation of proline in the upland rice varieties. It may be concluded that the activities of antioxidant enzymes and proline accumulation were associated with the dry mass production and consequently with the drought tolerance of the upland rice varieties.
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Claims 6
Claim · model-written summary
Pulot Wangi tolerated PEG at -8 bar without a significant difference from control.
- Taxon
- UPLAND RICE
Oryza sativat0 - Material
- Pulot Wangie0
- Treatment
- PEG at the highest drought level (-8 bar)e0
- Outcome
- tolerated PEGe0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“UPLAND RICE”
e0“The drought-tolerant variety, Pulot Wangi tolerated PEG at the highest drought level (-8 bar) and showed no significantly difference relation to control.”
Claim · model-written summary
Kusam was markedly affected at the lowest drought level.
- Taxon
- UPLAND RICEOryza sativat0
- Material
- Kusame0
- Treatment
- lowest drought level usede0
- Outcome
- markedly affectede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“UPLAND RICE”
e0“However, drought-sensitive variety, Kusam was markedly affected even at the lowest drought level used.”
Claim · model-written summary
Antioxidant enzyme activities increased during drought stress in the drought-tolerant varieties.
- Taxon
- UPLAND RICEOryza sativat0
- Material
- drought-tolerant varietiese0
- Treatment
- drought stresse0
- Outcome
- activity of antioxidant enzymes catalase, peroxidase and superoxide dismutasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“UPLAND RICE”
e0“Concomitantly, the activity of antioxidant enzymes catalase, peroxidase and superoxide dismutase in the drought-tolerant varieties increased markedly during drought stress, while decreased by drought stress in the drought sensitive variety.”
Claim · model-written summary
Antioxidant enzyme activities decreased during drought stress in the drought sensitive variety.
- Taxon
- UPLAND RICEOryza sativat0
- Material
- drought sensitive varietye0
- Treatment
- drought stresse0
- Outcome
- activity of antioxidant enzymes catalase, peroxidase and superoxide dismutasee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“UPLAND RICE”
e0“Concomitantly, the activity of antioxidant enzymes catalase, peroxidase and superoxide dismutase in the drought-tolerant varieties increased markedly during drought stress, while decreased by drought stress in the drought sensitive variety.”
Claim · model-written summary
Proline accumulation differed markedly among upland rice varieties.
- Taxon
- UPLAND RICEOryza sativat0
- Outcome
- accumulation of prolinee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“UPLAND RICE”
e0“Consequently, this led to a marked difference in the accumulation of proline in the upland rice varieties.”
Claim · model-written summary
The authors associated antioxidant enzyme activities and proline accumulation with dry mass production and drought tolerance.
- Taxon
- UPLAND RICEOryza sativat0
- Compound
- prolinee0
- Outcome
- dry mass productione0
- Qualifier
- drought tolerancee0
Not reportedOrgan / stageDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“UPLAND RICE”
e0“It may be concluded that the activities of antioxidant enzymes and proline accumulation were associated with the dry mass production and consequently with the drought tolerance of the upland rice varieties.”
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
- positive
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- positive
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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.