Abstract
Chilling whole rice seedlings at 5 degrees C significantly increased the time needed to recover linear growth and reduced the subsequent linear rate of radicle growth. Subjecting nonchilled seedlings to a 45 degrees C heat shock for up to 20 min did not alter subsequent growth, whereas a 3 min heat shock was optimal in reducing growth inhibition caused by 2 days of chilling. The activity of five antioxidant enzymes [superoxide dismutase (EC 1.15.1.1), catalase (CAT; EC 1.11.1.6), ascorbate peroxidase (APX; EC 1.11.1.11), glutathione reductase (GR; EC 1.6.4.2), and guaiacol peroxidase (GPX; EC 1.11.1.7)] and DPPH (1,1-diphenyl-2-picrylhydrazyl)-radical scavenging activity were measured in heat-shocked and/or chilled radicles. Heat shock slightly increased the activity of CAT, APX, and GR and suppressed the increase of GR and GPX activity during recovery from chilling. Increased CAT, APX, GR, and DPPH-radical scavenging activity and protection of CAT activity during chilling appear to be correlated with heat shock-induced chilling tolerance.
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Claims 8
Claim · model-written summary
Chilling increased time to resume linear radicle growth.
- Taxon
- rice seedlings
Oryza sativae0 - Treatment
- Chilling whole rice seedlings at 5 degrees Ce0
- Outcome
- time needed to recover linear growthe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chilling whole rice seedlings at 5 degrees C significantly increased the time needed to recover linear growth”
Claim · model-written summary
Chilling reduced subsequent linear radicle growth rate.
- Taxon
- rice seedlingsOryza sativae0
- Treatment
- Chilling whole rice seedlings at 5 degrees Ce0
- Outcome
- subsequent linear rate of radicle growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chilling whole rice seedlings at 5 degrees C significantly increased the time needed to recover linear growth and reduced the subsequent linear rate of radicle growth”
Claim · model-written summary
Heat shock of nonchilled seedlings did not alter subsequent growth.
- Taxon
- RiceOryza sativat0
- Treatment
- 45 degrees C heat shock for up to 20 mine0
- Outcome
- subsequent growthe0
- Direction
- did not altere0
- Comparator
- nonchilled seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Subjecting nonchilled seedlings to a 45 degrees C heat shock for up to 20 min did not alter subsequent growth”
t0“Rice (Oryza sativa L.) Seedlings Radicles”
Claim · model-written summary
A three-minute heat shock optimally reduced growth inhibition after two days of chilling.
- Taxon
- RiceOryza sativat0
- Treatment
- 3 min heat shocke0
- Outcome
- growth inhibitione0
- Direction
- reducinge0
- Qualifier
- 2 days of chillinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 3 min heat shock was optimal in reducing growth inhibition caused by 2 days of chilling”
t0“Rice (Oryza sativa L.) Seedlings Radicles”
Claim · model-written summary
Heat shock slightly increased catalase, ascorbate peroxidase and glutathione reductase activity.
- Taxon
- RiceOryza sativat0
- Treatment
- Heat shocke0
- Outcome
- activity of CAT, APX, and GRe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heat shock slightly increased the activity of CAT, APX, and GR”
t0“Rice (Oryza sativa L.) Seedlings Radicles”
Claim · model-written summary
Heat shock suppressed the rise in glutathione reductase and guaiacol peroxidase activity during recovery from chilling.
- Taxon
- RiceOryza sativat0
- Treatment
- Heat shocke1
- Outcome
- increase of GR and GPX activitye0
- Direction
- suppressede0
- Qualifier
- during recovery from chillinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“suppressed the increase of GR and GPX activity during recovery from chilling”
e1“Heat shock slightly increased”
t0“Rice (Oryza sativa L.) Seedlings Radicles”
Claim · model-written summary
Higher CAT, APX, GR and DPPH scavenging activity correlated with heat shock induced chilling tolerance.
- Taxon
- RiceOryza sativat0
- Treatment
- heat shocke0
- Outcome
- heat shock-induced chilling tolerancee0
- Qualifier
- appear to be correlatede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased CAT, APX, GR, and DPPH-radical scavenging activity and protection of CAT activity during chilling appear to be correlated with heat shock-induced chilling tolerance”
t0“Rice (Oryza sativa L.) Seedlings Radicles”
Claim · model-written summary
Protection of CAT activity during chilling correlated with heat shock induced chilling tolerance.
- Taxon
- RiceOryza sativat0
- Treatment
- heat shocke0
- Outcome
- heat shock-induced chilling tolerancee0
- Qualifier
- protection of CAT activity during chillinge0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“protection of CAT activity during chilling appear to be correlated with heat shock-induced chilling tolerance”
t0“Rice (Oryza sativa L.) Seedlings Radicles”
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See all 107 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.