Abstract
ABSTRACT Changes of ABA levels in chilled rice ( Oryza sativa L.) seedlings of two varieties were determined. On exposure to chilling, ABA concentration rapidly increased in the chilling‐tolerant cultivar (cv. Tainung 67, TNG.67) but not in the chilling‐sensitive cultivar (cv. Taichung Native 1, TN.1). Both detached shoots and roots of TNG.67 seedlings showed a significant ABA increase after exposure to chilling. TN.1 seedlings could not accumulate ABA under low temperature but well‐watered status. Exogenous application of the ABA biosynthetic inhibitor, fluridone, reduced ABA accumulation, as well as survival ratio of chilled TNG.67 seedlings. Electrolyte leakage and leaf conductance were also increased by the inhibitor and the effects could be reversed by exogenously applied ABA. ABA concentrations in xylem sap of TNG.67 seedlings increased within 4 h after chilling, and this was temporally coincident with the reduction of leaf conductance. The roles of endogenous ABA in the tolerance of rice seedlings to chilling on a whole plant basis are discussed and suggested.
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Claims 7
Claim · model-written summary
Chilling rapidly increased ABA concentration in tolerant Tainung 67 but not sensitive Taichung Native 1.
- Taxon
- rice
Oryza sativae1 - Material
- cv. Tainung 67e0
- Treatment
- chillinge0
- Outcome
- ABA concentratione0
- Direction
- increasede0
- Comparator
- cv. Taichung Native 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On exposure to chilling, ABA concentration rapidly increased in the chilling‐tolerant cultivar (cv. Tainung 67, TNG.67) but not in the chilling‐sensitive cultivar (cv. Taichung Native 1, TN.1)”
e1“rice ( Oryza sativa L.)”
Claim · model-written summary
Detached shoots and roots of TNG.67 had significant ABA increases after chilling.
- Taxon
- riceOryza sativae1
- Material
- TNG.67e0
- Organ / stage
- shoots and rootse0
- Treatment
- chillinge0
- Outcome
- ABAe0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both detached shoots and roots of TNG.67 seedlings showed a significant ABA increase after exposure to chilling”
e1“rice ( Oryza sativa L.)”
Claim · model-written summary
TN.1 seedlings failed to accumulate ABA under low temperature and well-watered conditions.
- Taxon
- riceOryza sativae1
- Material
- TN.1e0
- Outcome
- could not accumulate ABAe0
- Qualifier
- low temperature but well‐watered statuse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TN.1 seedlings could not accumulate ABA under low temperature but well‐watered status”
e1“rice ( Oryza sativa L.)”
Claim · model-written summary
Fluridone reduced ABA accumulation in chilled TNG.67 seedlings.
- Taxon
- riceOryza sativae1
- Material
- TNG.67e0
- Treatment
- fluridonee0
- Outcome
- ABA accumulatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous application of the ABA biosynthetic inhibitor, fluridone, reduced ABA accumulation, as well as survival ratio of chilled TNG.67 seedlings”
e1“rice ( Oryza sativa L.)”
Claim · model-written summary
Fluridone reduced survival ratio of chilled TNG.67 seedlings.
- Taxon
- riceOryza sativae1
- Material
- TNG.67e0
- Treatment
- fluridonee0
- Outcome
- survival ratioe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fluridone, reduced ABA accumulation, as well as survival ratio of chilled TNG.67 seedlings”
e1“rice ( Oryza sativa L.)”
Claim · model-written summary
Fluridone increased electrolyte leakage and leaf conductance; applied ABA reversed these effects.
- Taxon
- riceOryza sativae1
- Treatment
- the inhibitore0
- Outcome
- Electrolyte leakage and leaf conductancee0
- Direction
- increasede0
- Qualifier
- reversed by exogenously applied ABAe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Electrolyte leakage and leaf conductance were also increased by the inhibitor and the effects could be reversed by exogenously applied ABA”
e1“rice ( Oryza sativa L.)”
Claim · model-written summary
Xylem sap ABA increased within four hours after chilling in TNG.67, coinciding with reduced leaf conductance.
- Taxon
- riceOryza sativae1
- Material
- TNG.67e0
- Organ / stage
- xylem sape0
- Outcome
- ABA concentrationse0
- Direction
- increasede0
- Qualifier
- reduction of leaf conductancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA concentrations in xylem sap of TNG.67 seedlings increased within 4 h after chilling, and this was temporally coincident with the reduction of leaf conductance”
e1“rice ( Oryza sativa L.)”
The same questions in other papers
Fluridone · physiology: hormones · Oryza sativa (rice)Results agree
3 papers in the same direction as this paper
- negative
- no effect
- negative
cold · physiology: hormones · Oryza sativa (rice)Results differ
5 in the opposite direction
- negative
- negative
- no effect
2 papers more in this group
See all 6 papers →cold · molecular: metabolites · Oryza sativa (rice)Positive and negative results
10 papers in the same direction as this paper · 10 in the opposite direction
- negative
- negative
- no effect
17 papers more in this group
See all 21 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.