Abstract
The antagonism between abscisic acid (ABA) and gibberellin (GA) plays a key role in controlling seed germination, but the mechanism of antagonism during this process is not known. In the associated study, we investigated the relationship among ABA, reactive oxygen species (ROS), ascorbic acid (ASC) and GA during rice seed germination. ROS production is reduced by ABA, which hence results in decreasing ASC accumulation during imbibition. GA accumulation was also suppressed by a reduced ROS and ASC level, whereas application of exogenous ASC can partially rescue seed germination from ABA treatment. Further results show that production of ASC, which acts as a substrate in GA biosynthesis, was significantly inhibited by lycorine which thus suppressed the accumulation of GA. Consequently, expression of GA biosynthesis genes was suppressed by the low levels of ROS and ASC in ABA-treated seeds. These studies reveal a new role for ASC in mediating the antagonism between ABA and GA during seed germination in rice.
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Claims 8
Claim · model-written summary
ABA reduces ROS production during imbibition of rice seeds
- Taxon
- rice
Oryza sativae0 - Treatment
- ABAe1
- Outcome
- ROS productione1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“during rice seed germination”
e1“ROS production is reduced by ABA, which hence results in decreasing ASC accumulation during imbibition”
Claim · model-written summary
ABA leads to decreased ascorbic acid accumulation during imbibition of rice seeds
- Taxon
- riceOryza sativae0
- Treatment
- ABAe1
- Outcome
- ASC accumulatione1
- Direction
- decreasinge1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“during rice seed germination”
e1“ROS production is reduced by ABA, which hence results in decreasing ASC accumulation during imbibition”
Claim · model-written summary
GA accumulation is suppressed by reduced ROS and ascorbic acid levels in rice seeds
- Taxon
- riceOryza sativae0
- Treatment
- reduced ROS and ASC levele2
- Outcome
- GA accumulatione2
- Direction
- suppressede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“during rice seed germination”
e2“GA accumulation was also suppressed by a reduced ROS and ASC level”
Claim · model-written summary
Exogenous ascorbic acid partially rescues rice seed germination from ABA treatment
- Taxon
- riceOryza sativae0
- Treatment
- exogenous ASCe3
- Outcome
- seed germinatione3
- Direction
- partially rescuee3
- Comparator
- ABA treatmente3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“during rice seed germination”
e3“application of exogenous ASC can partially rescue seed germination from ABA treatment”
Claim · model-written summary
Lycorine significantly inhibits ASC production in rice seeds
- Taxon
- riceOryza sativae0
- Treatment
- lycorinee4
- Compound
- ASCe4
- Outcome
- production of ASCe4
- Direction
- significantly inhibitede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“during rice seed germination”
e4“production of ASC, which acts as a substrate in GA biosynthesis, was significantly inhibited by lycorine which thus suppressed the accumulation of GA”
Claim · model-written summary
Lycorine suppresses GA accumulation in rice seeds
- Taxon
- riceOryza sativae0
- Treatment
- lycorinee4
- Outcome
- accumulation of GAe4
- Direction
- suppressede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“during rice seed germination”
e4“production of ASC, which acts as a substrate in GA biosynthesis, was significantly inhibited by lycorine which thus suppressed the accumulation of GA”
Claim · model-written summary
Low levels of ROS and ASC suppress expression of GA biosynthesis genes in ABA-treated rice seeds
- Taxon
- riceOryza sativae0
- Treatment
- low levels of ROS and ASCe5
- Gene
- GA biosynthesis genese5
- Outcome
- expression of GA biosynthesis genese5
- Direction
- suppressede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“during rice seed germination”
e5“expression of GA biosynthesis genes was suppressed by the low levels of ROS and ASC in ABA-treated seeds”
Claim · model-written summary
ASC mediates the antagonism between ABA and GA during rice seed germination
- Taxon
- riceOryza sativae6
- Compound
- ASCe6
- Outcome
- antagonism between ABA and GAe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“These studies reveal a new role for ASC in mediating the antagonism between ABA and GA during seed germination in rice”
The same questions in other papers
ascorbic acid · growth · Oryza sativa (rice)Results differ
4 papers in the same direction as this paper · 2 in the opposite direction
- positive
- negative
- no effect
3 papers more in this group
See all 7 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.