Abstract
Reactive oxygen species have been suggested to play a signaling role in seed dormancy alleviation. When sunflower seeds become able to fully germinate during dry after-ripening, they accumulate high amount of hydrogen peroxide and exhibit a low detoxifying ability through catalase, resulting from the decrease in CATA1 transcript. ROS accumulation entails oxidative modification of soluble and storage proteins through carbonylation, which suggests that this process might play an important role in plant developmental processes. However other oxidative signaling pathways cannot be excluded. For example, a cDNA-AFLP study shows that seed after-ripening is also associated with changes in gene expression and that changes in ROS content during seed imbibition are also related to changes in expression pattern.
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Claims 5
Claim · model-written summary
After-ripened sunflower seeds capable of germination accumulated hydrogen peroxide.
- Taxon
- sunflower seeds
Helianthus annuuse0 - Organ / stage
- seedse0
- Outcome
- hydrogen peroxidee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When sunflower seeds become able to fully germinate during dry after-ripening, they accumulate high amount of hydrogen peroxide”
Claim · model-written summary
After-ripened sunflower seeds had low catalase detoxifying ability alongside decreased CATA1 transcript.
Not reportedTaxon
Verbatim
e0“exhibit a low detoxifying ability through catalase, resulting from the decrease in CATA1 transcript”
Claim · model-written summary
ROS accumulation was linked to protein carbonylation.
Not reportedTaxon
Verbatim
e0“ROS accumulation entails oxidative modification of soluble and storage proteins through carbonylation”
Claim · model-written summary
Seed after-ripening was associated with changes in gene expression.
Not reportedTaxonDirection
Verbatim
e0“seed after-ripening is also associated with changes in gene expression”
Claim · model-written summary
ROS content changes during seed imbibition were related to expression pattern changes.
Not reportedTaxonDirection
Verbatim
e0“changes in ROS content during seed imbibition are also related to changes in expression pattern”