Abstract
Abstract During rainfed upland rice ( Oryza sativa ) cultivation, unpredictable drought events can hinder the rice growth. Although drought tolerance is a reported effect of seed priming treatment, we hypothesized that plants from primed seeds would die because they would begin to emerge in dry soil. We also expected that nonemerged primed seeds would show decreased seed vigor because their metabolism was activated by priming before sowing. Therefore, we investigated the vigor of hydroprimed and nonprimed seeds during prolonged drought after sowing during upland rice cultivation. A field experiment was conducted on a rainfed upland field that had insufficient rainfall at the beginning of the season. Plant emergence, establishment, and vigor in resown nongerminated seeds were also investigated. A subsequent growth chamber experiment was conducted to investigate the relationship between sown seed deterioration, soil moisture, and temperature. Contrary to the hypothesis, plants from primed as well as control seeds could survive under prolonged drought after emergence. In the nongerminated primed seeds, oxidative damage was increased. However, the percentage of plant emergence in resown seeds did not differ between treatments. Overall, the performance of primed seeds was better than or similar to that of the control seeds. In conclusion, primed seeds have advantages even under extreme drought conditions in rainfed upland fields.
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Claims 4
Claim · model-written summary
Plants from primed as well as control rice seeds survived prolonged drought after emergence, contrary to the hypothesis.
- Taxon
- Oryza sativa
Oryza sativae0 - Treatment
- primede1
- Outcome
- survive under prolonged droughte1
- Comparator
- control seedse1
- Setting
- rainfed upland fielde2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During rainfed upland rice ( Oryza sativa ) cultivation”
e1“Contrary to the hypothesis, plants from primed as well as control seeds could survive under prolonged drought after emergence”
e2“A field experiment was conducted on a rainfed upland field”
Claim · model-written summary
Oxidative damage was increased in nongerminated primed rice seeds.
- Taxon
- Oryza sativaOryza sativae0
- Treatment
- primede1
- Outcome
- oxidative damagee1
- Direction
- increasede1
- Comparator
- nonprimed seedse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During rainfed upland rice ( Oryza sativa ) cultivation”
e1“In the nongerminated primed seeds, oxidative damage was increased”
e2“we investigated the vigor of hydroprimed and nonprimed seeds”
Claim · model-written summary
The percentage of plant emergence in resown rice seeds did not differ between primed and nonprimed seeds.
- Taxon
- Oryza sativaOryza sativae0
- Treatment
- hydroprimede2
- Outcome
- percentage of plant emergencee1
- Direction
- did not differe1
- Comparator
- nonprimed seedse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During rainfed upland rice ( Oryza sativa ) cultivation”
e1“the percentage of plant emergence in resown seeds did not differ between treatments”
e2“we investigated the vigor of hydroprimed and nonprimed seeds”
Claim · model-written summary
Overall, the performance of primed rice seeds was better than or similar to that of control seeds.
- Taxon
- Oryza sativaOryza sativae0
- Treatment
- primed seedse1
- Outcome
- performancee1
- Direction
- better than or similar toe1
- Comparator
- control seedse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During rainfed upland rice ( Oryza sativa ) cultivation”
e1“Overall, the performance of primed seeds was better than or similar to that of the control seeds”
The same questions in other papers
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27 papers more in this group
See all 31 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.