Abstract
Nonphotochemical quenching (NPQ) regulates energy conversion in photosystem II and protects plants from photoinhibition. Here we analyze NPQ capacity in a number of rice cultivars. NPQ was strongly induced under medium and high light intensities in rice leaves. Japonica cultivars generally showed higher NPQ capacities than Indica cultivars when we measured a rice core collection. We mapped NPQ regulator and identified a locus (qNPQ1-2) that seems to be responsible for the difference in NPQ capacity between Indica and Japonica. One of the two rice PsbS homologues (OsPsbS1) was found within the qNPQ1-2 region. PsbS protein was not accumulated in the leaf blade of the mutant harboring transferred DNA insertion in OsPsbS1. NPQ capacity increased as OsPsbS1 expression increased in a series of transgenic lines ectopically expressing OsPsbS1 in an Indica cultivar. Indica cultivars lack a 2.7-kb region at the point 0.4 kb upstream of the OsPsbS1 gene, suggesting evolutionary discrimination of this gene.
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Claims 7
Claim · model-written summary
NPQ was strongly induced in rice leaves under medium and high light intensities.
- Taxon
- rice
Oryza sativae0 - Organ / stage
- leavese0
- Treatment
- medium and high light intensitiese0
- Outcome
- NPQe0
- Direction
- strongly inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NPQ was strongly induced under medium and high light intensities in rice leaves”
Claim · model-written summary
In a rice core collection, Japonica cultivars generally showed higher NPQ capacities than Indica cultivars.
- Taxon
- riceOryza sativae0
- Material
- Japonica cultivarse0
- Outcome
- NPQ capacitiese0
- Direction
- highere0
- Comparator
- Indica cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Japonica cultivars generally showed higher NPQ capacities than Indica cultivars when we measured a rice core collection”
Claim · model-written summary
A locus, qNPQ1-2, seems to be responsible for the difference in NPQ capacity between Indica and Japonica rice.
- Taxon
- riceOryza sativae0
- Material
- Indica and Japonicae1
- Gene
- qNPQ1-2e1
- Outcome
- NPQ capacitye1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rice”
e1“identified a locus (qNPQ1-2) that seems to be responsible for the difference in NPQ capacity between Indica and Japonica”
Claim · model-written summary
The rice PsbS homologue OsPsbS1 was found within the qNPQ1-2 region.
- Taxon
- riceOryza sativae0
- Gene
- OsPsbS1e0
- Outcome
- was found within the qNPQ1-2 regione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One of the two rice PsbS homologues (OsPsbS1) was found within the qNPQ1-2 region”
Claim · model-written summary
PsbS protein did not accumulate in the leaf blade of the mutant with a T-DNA insertion in OsPsbS1.
- Taxon
- riceOryza sativae0
- Material
- mutant harboring transferred DNA insertion in OsPsbS1e1
- Organ / stage
- leaf bladee1
- Gene
- PsbS proteine1
- Outcome
- PsbS protein was not accumulatede1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rice”
e1“PsbS protein was not accumulated in the leaf blade of the mutant harboring transferred DNA insertion in OsPsbS1”
Claim · model-written summary
NPQ capacity increased as OsPsbS1 expression increased in transgenic lines ectopically expressing OsPsbS1 in an Indica cultivar.
- Taxon
- riceOryza sativae0
- Material
- transgenic lines ectopically expressing OsPsbS1 in an Indica cultivare1
- Gene
- OsPsbS1e1
- Outcome
- NPQ capacitye1
- Direction
- increasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rice”
e1“NPQ capacity increased as OsPsbS1 expression increased in a series of transgenic lines ectopically expressing OsPsbS1 in an Indica cultivar”
Claim · model-written summary
Indica cultivars lack a 2.7-kb region about 0.4 kb upstream of the OsPsbS1 gene.
- Taxon
- riceOryza sativae0
- Material
- Indica cultivarse1
- Gene
- OsPsbS1 genee1
- Outcome
- lack a 2.7-kb regione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rice”
e1“Indica cultivars lack a 2.7-kb region at the point 0.4 kb upstream of the OsPsbS1 gene”