Abstract
Wheat (Triticum aestivum L.) often experiences photoinhibition due to strong light during the grain filling stage. As such, increasing the tolerance of wheat to photoinhibition is very desirable in breeding efforts focused on increasing grain yields. Previous reports have suggested that PROTON GRADIENT REGULATION 5 (PGR5) plays a central role in the generation of a proton gradient across the thylakoid membrane (ΔpH) and in acclimation to high light intensity conditions. Three PGR5 homoeologues were isolated from wheat, and mapped onto chromosomes 7A, 7B and 7D, respectively. The TaPGR5s shared highly similar genomic sequences and gene structures. The transcripts of TaPGR5s were found to be abundantly expressed in the flag leaves, and were transiently up-regulated by treatment with high light. High light treatment inhibited the net photosynthetic rate (Pn) and the maximal quantum yield of photosystem II (Fv/Fm). Further, these inhibitions were more evident in the leaves with reduced expression of TaPGR5s achieved using virus-induced gene silencing methods. Moreover, reducing TaPGR5 expression impaired the induction of non-photochemical quenching (NPQ), which caused more severe cell membrane damage and lipid peroxidation in high light. Additionally, we observed that TaPGR5s transcripts were more abundantly expressed in the wheat genotypes with higher ms-delayed light emission (ms-DLE), a value reflecting transthylakoid ΔpH. These results suggested that TaPGR5s play important roles in the tolerance of wheat to photoinhibition.
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Claims 12
Claim · model-written summary
Three wheat PGR5 homoeologues were isolated and mapped to chromosomes 7A, 7B and 7D.
- Taxon
- wheat
Triticum aestivume0 - Gene
- PGR5 homoeologuese0
- Outcome
- mapped onto chromosomes 7A, 7B and 7De0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three PGR5 homoeologues were isolated from wheat, and mapped onto chromosomes 7A, 7B and 7D, respectively.”
Claim · model-written summary
TaPGR5s had highly similar genomic sequences and gene structures.
- Taxon
- WheatTriticum aestivumt0
- Gene
- TaPGR5se0
- Outcome
- highly similar genomic sequences and gene structurese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The TaPGR5s shared highly similar genomic sequences and gene structures.”
t0“Wheat”
Claim · model-written summary
TaPGR5s transcripts were abundant in flag leaves.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- flag leavese0
- Gene
- TaPGR5se0
- Outcome
- abundantly expressede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The transcripts of TaPGR5s were found to be abundantly expressed in the flag leaves”
t0“Wheat”
Claim · model-written summary
High light transiently upregulated TaPGR5s transcripts.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- high lighte0
- Gene
- TaPGR5se0
- Outcome
- transcripts of TaPGR5se0
- Direction
- up-regulatede0
- Qualifier
- transientlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The transcripts of TaPGR5s were found to be abundantly expressed in the flag leaves, and were transiently up-regulated by treatment with high light.”
t0“Wheat”
Claim · model-written summary
High light inhibited net photosynthetic rate.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- High light treatmente0
- Outcome
- net photosynthetic rate (Pn)e0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High light treatment inhibited the net photosynthetic rate (Pn) and the maximal quantum yield of photosystem II (Fv/Fm).”
t0“Wheat”
Claim · model-written summary
High light inhibited maximal quantum yield of photosystem II.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- High light treatmente0
- Outcome
- maximal quantum yield of photosystem II (Fv/Fm)e0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High light treatment inhibited the net photosynthetic rate (Pn) and the maximal quantum yield of photosystem II (Fv/Fm).”
t0“Wheat”
Claim · model-written summary
Silencing TaPGR5s made high-light photosynthetic inhibition more evident.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- reduced expression of TaPGR5se0
- Gene
- TaPGR5se0
- Outcome
- these inhibitionse0
- Direction
- more evidente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these inhibitions were more evident in the leaves with reduced expression of TaPGR5s achieved using virus-induced gene silencing methods.”
e1“High light treatment inhibited the net photosynthetic rate (Pn) and the maximal quantum yield of photosystem II (Fv/Fm).”
t0“Wheat”
Claim · model-written summary
Reducing TaPGR5 expression impaired non-photochemical quenching induction.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- reducing TaPGR5 expressione0
- Gene
- TaPGR5e0
- Outcome
- induction of non-photochemical quenching (NPQ)e0
- Direction
- impairede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reducing TaPGR5 expression impaired the induction of non-photochemical quenching (NPQ)”
t0“Wheat”
Claim · model-written summary
Reduced TaPGR5 expression caused more severe cell membrane damage under high light.
- Taxon
- WheatTriticum aestivumt0
- Gene
- TaPGR5e0
- Outcome
- cell membrane damagee0
- Direction
- more severee0
- Qualifier
- in high lighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reducing TaPGR5 expression impaired the induction of non-photochemical quenching (NPQ), which caused more severe cell membrane damage and lipid peroxidation in high light.”
t0“Wheat”
Claim · model-written summary
Reduced TaPGR5 expression caused more severe lipid peroxidation under high light.
- Taxon
- WheatTriticum aestivumt0
- Gene
- TaPGR5e0
- Outcome
- lipid peroxidatione0
- Direction
- more severee0
- Qualifier
- in high lighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reducing TaPGR5 expression impaired the induction of non-photochemical quenching (NPQ), which caused more severe cell membrane damage and lipid peroxidation in high light.”
t0“Wheat”
Claim · model-written summary
TaPGR5s transcript abundance was higher in genotypes with higher ms-DLE.
- Taxon
- WheatTriticum aestivumt0
- Material
- wheat genotypese0
- Gene
- TaPGR5se0
- Outcome
- TaPGR5s transcriptse0
- Direction
- more abundantlye0
- Qualifier
- higher ms-delayed light emission (ms-DLE)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TaPGR5s transcripts were more abundantly expressed in the wheat genotypes with higher ms-delayed light emission (ms-DLE)”
t0“Wheat”
Claim · model-written summary
The authors infer TaPGR5s contribute to photoinhibition tolerance in wheat.
- Taxon
- wheatTriticum aestivume0
- Gene
- TaPGR5se0
- Outcome
- tolerance of wheat to photoinhibitione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results suggested that TaPGR5s play important roles in the tolerance of wheat to photoinhibition.”
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See all 39 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.