Abstract
ABSTRACT This study was to test the hypothesis that the interaction between abscisic acid (ABA) and ethylene may be involved in mediating the effects of water stress on grain filling. Two high lodging‐resistant rice ( Oryza sativa L.) cultivars were pot‐grown. Three treatments, well‐watered, moderate water‐stressed (MD), and severe water‐stressed (SD), were imposed from 9 d post‐anthesis until maturity. Grain filling rate and grain weight were significantly increased under MD but decreased under SD. The two cultivars behaved the same. ABA concentration in the grains was very low during the grain filling stage, reaching a maximum when the grain filling rate was highest. Both the grain filling rate and ABA concentration were substantially enhanced by water stress. In contrast to ABA, concentrations of ethylene and 1‐aminocylopropane ‐1‐carboxylic acid (ACC) in the grains were very high at early grain filling stage and sharply decreased during the linear period of grain growth. MD reduced, whereas SD remarkably increased, their accumulation. The ratio of ABA to ACC was increased in MD grains but decreased in SD grains, indicating that there was a greater enhancement of ABA concentration than ethylene production in the MD treatment only. Application of cobalt ion (inhibitor of ethylene synthesis) or ABA at the early grain filling stage significantly increased grain filling rate. Spraying with ethephon (ethylene‐releasing agent) or fluridone (inhibitor of ABA synthesis) had the opposite effect. The results suggest that antagonistic interactions between ABA and ethylene mediate the grain filling rate, and a high ratio of ABA to ethylene enhances grain filling rate.
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 13
Claim · model-written summary
Moderate water stress significantly increased grain filling rate and grain weight.
- Taxon
- rice
Oryza sativat0 - Treatment
- MDe0
- Outcome
- Grain filling rate and grain weighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice grains”
e0“Grain filling rate and grain weight were significantly increased under MD but decreased under SD”
Claim · model-written summary
Severe water stress significantly decreased grain filling rate and grain weight.
- Taxon
- riceOryza sativat0
- Treatment
- SDe0
- Outcome
- Grain filling rate and grain weighte0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice grains”
e0“Grain filling rate and grain weight were significantly increased under MD but decreased under SD”
Claim · model-written summary
Both cultivars responded the same way.
- Taxon
- riceOryza sativat0
- Outcome
- behaved the samee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice grains”
e0“The two cultivars behaved the same”
Claim · model-written summary
Grain ABA reached a maximum when grain filling rate was highest.
- Taxon
- riceOryza sativat0
- Organ / stage
- grainse0
- Compound
- ABAe0
- Outcome
- grain filling ratee0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice grains”
e0“ABA concentration in the grains was very low during the grain filling stage, reaching a maximum when the grain filling rate was highest”
Claim · model-written summary
Water stress enhanced grain filling rate and ABA concentration.
- Taxon
- riceOryza sativat0
- Treatment
- water stresse0
- Outcome
- grain filling rate and ABA concentratione0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice grains”
e0“Both the grain filling rate and ABA concentration were substantially enhanced by water stress”
Claim · model-written summary
Grain ethylene and ACC were high early and declined during linear growth.
- Taxon
- riceOryza sativat0
- Organ / stage
- grainse0
- Outcome
- concentrations of ethylene and 1‐aminocylopropane ‐1‐carboxylic acid (ACC)e0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice grains”
e0“concentrations of ethylene and 1‐aminocylopropane ‐1‐carboxylic acid (ACC) in the grains were very high at early grain filling stage and sharply decreased during the linear period of grain growth”
Claim · model-written summary
Moderate water stress reduced ethylene and ACC accumulation.
- Taxon
- riceOryza sativat0
- Treatment
- MDe0
- Outcome
- ethylene and 1‐aminocylopropane ‐1‐carboxylic acid (ACC)e1
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice grains”
e0“MD reduced, whereas SD remarkably increased, their accumulation”
e1“concentrations of ethylene and 1‐aminocylopropane ‐1‐carboxylic acid (ACC)”
Claim · model-written summary
Severe water stress increased ethylene and ACC accumulation.
- Taxon
- riceOryza sativat0
- Treatment
- SDe0
- Outcome
- ethylene and 1‐aminocylopropane ‐1‐carboxylic acid (ACC)e1
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice grains”
e0“MD reduced, whereas SD remarkably increased, their accumulation”
e1“concentrations of ethylene and 1‐aminocylopropane ‐1‐carboxylic acid (ACC)”
Claim · model-written summary
Moderate stress increased the ABA to ACC ratio.
- Taxon
- riceOryza sativat0
- Treatment
- MDe0
- Outcome
- ratio of ABA to ACCe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice grains”
e0“The ratio of ABA to ACC was increased in MD grains but decreased in SD grains”
Claim · model-written summary
Severe stress decreased the ABA to ACC ratio.
- Taxon
- riceOryza sativat0
- Treatment
- SDe0
- Outcome
- ratio of ABA to ACCe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice grains”
e0“The ratio of ABA to ACC was increased in MD grains but decreased in SD grains”
Claim · model-written summary
Cobalt ion or ABA application significantly increased grain filling rate.
- Taxon
- riceOryza sativat0
- Treatment
- cobalt ion (inhibitor of ethylene synthesis) or ABAe0
- Outcome
- grain filling ratee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice grains”
e0“Application of cobalt ion (inhibitor of ethylene synthesis) or ABA at the early grain filling stage significantly increased grain filling rate”
Claim · model-written summary
Ethephon or fluridone spraying had the opposite effect on grain filling rate.
- Taxon
- riceOryza sativat0
- Treatment
- ethephon (ethylene‐releasing agent) or fluridone (inhibitor of ABA synthesis)e0
- Outcome
- grain filling ratee1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice grains”
e0“Spraying with ethephon (ethylene‐releasing agent) or fluridone (inhibitor of ABA synthesis) had the opposite effect”
e1“significantly increased grain filling rate”
Claim · model-written summary
The authors infer antagonism between ABA and ethylene mediates grain filling.
- Taxon
- riceOryza sativat0
- Compound
- ABA and ethylenee0
- Outcome
- grain filling ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice grains”
e0“antagonistic interactions between ABA and ethylene mediate the grain filling rate”
The same questions in other papers
(+)-abscisic acid · yield · Oryza sativa (rice)Results differ
21 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- no effect
- negative
22 papers more in this group
See all 26 papers →ethene · yield · Oryza sativa (rice)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
1 paper more in this group
See all 5 papers →(2-chloroethyl)phosphonic acid · yield · Oryza sativa (rice)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- negative
- positive
- positive
1 paper more in this group
See all 5 papers →cobalt atom · yield · Oryza sativa (rice)Positive and negative results
9 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
7 papers more in this group
See all 11 papers →Fluridone · yield · Oryza sativa (rice)Results agree
3 papers in the same direction as this paper
- negative
- negative
- no effect
drought · physiology: hormones · Oryza sativa (rice)Positive and negative results
3 papers in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- negative
5 papers more in this group
See all 9 papers →drought · molecular: metabolites · Oryza sativa (rice)Positive and negative results
20 papers in the same direction as this paper · 15 in the opposite direction
- negative
- negative
- negative
32 papers more in this group
See all 36 papers →drought · yield · Oryza sativa (rice)Positive and negative results
75 papers in the same direction as this paper · 246 in the opposite direction · 3 reporting no difference from an alternative
- negative
- negative
- negative
321 papers more in this group
See all 325 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.