Abstract
A rice mutant (Oryza sativa L. Nongken 58S) 'photoperiodsensitive male-sterile rice' (PGMR) is sterile under long day-length (LD), but fertile in short days-length (SD). Phytochrome (Phy) has proved to be the photoreceptor involved in photoperiod-induced male sterile process in PGMR.To speculate how phytochrome functions, PhyA levels in leaf extracts of PGMRand wild-type rice (Oryza sativa L. Nongken 58) under different photoperiods were measured by means of a sandwich enzyme-linked immunosorbent assay (ELISA). The top two leaves of treated rice plants were sampled at the end of the last dark phase for 10 cycles at photoperiod-sensitive stage for fertility alteration in the mutant. Compared with LD treatment, the SD treatment resulted in 39% increase of relative PhyA content (per unit fresh weight) in PGMR, but only in 18% increase in its wild-type. In addition, after 10 cycles of end of far-red irradiations of day,the heading and flowering dates of PGMR were delayed for 2 days, while its male fertility almost remained unchanged. It is well known that the end of day far-red responses are mediated by PhyB.These results suggested that in PGMR PhyA took part in regulation of male sterility, hut PhyB was involved in mediating flowering time.
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Claims 7
Claim · model-written summary
Short days increased relative PhyA content in the male-sterile rice mutant by 39% versus long days.
- Taxon
- rice
Oryza sativae0 - Material
- Oryza sativa L. Nongken 58Se0
- Treatment
- SD treatmente1
- Gene
- PhyAe1
- Outcome
- relative PhyA contente1
- Direction
- increasee1
- Value
- 39%e1
- Comparator
- LD treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A rice mutant (Oryza sativa L. Nongken 58S)”
e1“Compared with LD treatment, the SD treatment resulted in 39% increase of relative PhyA content (per unit fresh weight) in PGMR”
Claim · model-written summary
Short days increased relative PhyA content in wild-type rice by 18% versus long days.
- Taxon
- riceOryza sativae0
- Material
- Oryza sativa L. Nongken 58e0
- Treatment
- SD treatmente1
- Gene
- PhyAe1
- Outcome
- relative PhyA contente1
- Direction
- increasee1
- Value
- 18%e1
- Comparator
- LD treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wild-type rice (Oryza sativa L. Nongken 58)”
e1“Compared with LD treatment, the SD treatment resulted in 39% increase of relative PhyA content (per unit fresh weight) in PGMR, but only in 18% increase in its wild-type”
Claim · model-written summary
End-of-day far-red irradiation delayed heading in the male-sterile rice mutant by 2 days.
- Taxon
- RiceOryza sativat0
- Material
- PGMRe0
- Treatment
- 10 cycles of end of far-red irradiations of daye0
- Outcome
- headinge0
- Direction
- delayede0
- Value
- 2 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“after 10 cycles of end of far-red irradiations of day,the heading and flowering dates of PGMR were delayed for 2 days”
Claim · model-written summary
End-of-day far-red irradiation delayed flowering in the male-sterile rice mutant by 2 days.
- Taxon
- RiceOryza sativat0
- Material
- PGMRe0
- Treatment
- 10 cycles of end of far-red irradiations of daye0
- Outcome
- flowering datese0
- Direction
- delayede0
- Value
- 2 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“after 10 cycles of end of far-red irradiations of day,the heading and flowering dates of PGMR were delayed for 2 days”
Claim · model-written summary
Male fertility remained almost unchanged following far-red irradiation.
- Taxon
- RiceOryza sativat0
- Material
- PGMRe0
- Treatment
- 10 cycles of end of far-red irradiations of daye0
- Outcome
- male fertilitye0
- Direction
- almost remained unchangede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“after 10 cycles of end of far-red irradiations of day,the heading and flowering dates of PGMR were delayed for 2 days, while its male fertility almost remained unchanged”
Claim · model-written summary
The authors infer PhyA participates in male sterility regulation in the mutant.
- Taxon
- RiceOryza sativat0
- Material
- PGMRe0
- Gene
- PhyAe0
- Outcome
- regulation of male sterilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“in PGMR PhyA took part in regulation of male sterility”
Claim · model-written summary
The authors infer PhyB mediates flowering time.
- Taxon
- RiceOryza sativat0
- Gene
- PhyBe0
- Outcome
- flowering timee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“PhyB was involved in mediating flowering time”
The same questions in other papers
radiation · nutrient: content · Oryza sativa (rice)Positive and negative results
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See all 11 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.