Abstract
Seeds are usually stored in physiological conditions in which they gradually lose their viability and vigor depending on storage conditions, storage time, and genotype. Very little is known about the underlying genetics of seed storability and seed deterioration. We analyzed a mutant in Arabidopsis disturbed in seed storability. This mutant was isolated as a grs (green-seeded) mutant in an abi3-1 (abscisic acid 3) mutant background. Genetic and physiological characterization showed that the monogenic grs mutant was not visibly green seeded and mapped on chromosome 4. This enhancer mutation did not affect the ABA sensitivity of seed germination or seed dormancy but was found to affect seed storability and seedling vigor. Seed storability was assessed in a controlled deterioration test, in which the germination capacity of the mutant decreased with the duration of the treatment. The decrease in viability and vigor was confirmed by storing the seeds in two relative humidities (RHs) for a prolonged period. At 60% RH, the mutant lost germinability, but storage at 32% RH showed no decrease of germination although seed vigor decreased. The decrease in viability and vigor could be related to an increase in conductivity, suggesting membrane deterioration. This was not affected by light conditions during imbibition, expected to influence the generation of active oxygen species. During seed maturation, ABI3 regulates several processes: acquiring dormancy and long-term storability and loss of chlorophyll. Our results indicate that GRS is a common regulator in the latter two but not of dormancy/germination.
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Claims 11
Claim · model-written summary
The monogenic grs mutant was not visibly green seeded.
- Taxon
- Arabidopsis
Arabidopsist0 - Material
- grs mutante0
- Outcome
- not visibly green seedede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the monogenic grs mutant was not visibly green seeded and mapped on chromosome 4”
t0“Arabidopsis”
Claim · model-written summary
The grs mutant mapped to chromosome 4.
- Taxon
- ArabidopsisArabidopsist0
- Material
- grs mutante0
- Gene
- grse0
- Outcome
- mapped on chromosome 4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the monogenic grs mutant was not visibly green seeded and mapped on chromosome 4”
t0“Arabidopsis”
Claim · model-written summary
The enhancer mutation did not affect ABA sensitivity of germination or dormancy.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- enhancer mutatione0
- Outcome
- ABA sensitivity of seed germination or seed dormancye0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This enhancer mutation did not affect the ABA sensitivity of seed germination or seed dormancy but was found to affect seed storability and seedling vigor”
t0“Arabidopsis”
Claim · model-written summary
The enhancer mutation affected seed storability and seedling vigor.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- enhancer mutatione0
- Outcome
- seed storability and seedling vigore0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This enhancer mutation did not affect the ABA sensitivity of seed germination or seed dormancy but was found to affect seed storability and seedling vigor”
t0“Arabidopsis”
Claim · model-written summary
Mutant germination capacity decreased as controlled deterioration treatment continued.
- Taxon
- ArabidopsisArabidopsist0
- Material
- mutante0
- Treatment
- duration of the treatmente0
- Outcome
- germination capacitye0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the germination capacity of the mutant decreased with the duration of the treatment”
t0“Arabidopsis”
Claim · model-written summary
The mutant lost germinability at 60% RH.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 60% RH, the mutant lost germinability”
t0“Arabidopsis”
Claim · model-written summary
At 32% RH, mutant germination did not decrease.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- storage at 32% RHe0
- Outcome
- germinatione0
- Direction
- no decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“storage at 32% RH showed no decrease of germination although seed vigor decreased”
t0“Arabidopsis”
Claim · model-written summary
At 32% RH, mutant seed vigor decreased.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- storage at 32% RHe0
- Outcome
- seed vigore0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“storage at 32% RH showed no decrease of germination although seed vigor decreased”
t0“Arabidopsis”
Claim · model-written summary
The decrease in viability and vigor may relate to increased conductivity.
- Taxon
- ArabidopsisArabidopsist0
- Outcome
- decrease in viability and vigore0
- Direction
- decreasee0
- Qualifier
- increase in conductivitye0
Not reportedOrgan / stage
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The decrease in viability and vigor could be related to an increase in conductivity”
t0“Arabidopsis”
Claim · model-written summary
Light conditions during imbibition did not affect the observed decline.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- light conditions during imbibitione0
- Outcome
- Thise0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This was not affected by light conditions during imbibition”
t0“Arabidopsis”
Claim · model-written summary
The authors infer that GRS regulates storability and chlorophyll loss, but not dormancy or germination.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- GRSe0
- Outcome
- common regulator in the latter two but not of dormancy/germinatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our results indicate that GRS is a common regulator in the latter two but not of dormancy/germination”
t0“Arabidopsis”
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