Abstract
Sorghum (Sorghum bicolor L. Moench) is a C4 species sensitive to the cold spring conditions that occur at northern latitudes, especially when coupled with excessive light, and that greatly affect the photosynthetic rate. The objective of this study was to discover genes/genomic regions that control the capacity to cope with excessive energy under low temperature conditions during the vegetative growth period. A genome-wide association study (GWAS) was conducted for seven photosynthetic gas exchange and chlorophyll fluorescence traits under three consecutive temperature treatments: control (28 °C/24 °C), cold (15 °C/15 °C), and recovery (28 °C/24 °C). Cold stress significantly reduced the rate of photosynthetic CO2 uptake of sorghum plants, and a total of 143 unique genomic regions were discovered associated with at least one trait in a particular treatment or with derived variables. Ten regions on chromosomes 3, 4, 6, 7, and 8 that harbor multiple significant markers in linkage disequilibrium (LD) were consistently identified in gas exchange and chlorophyll fluorescence traits. Several candidate genes within those intervals have predicted functions related to carotenoids, phytohormones, thioredoxin, components of PSI, and antioxidants. These regions represent the most promising results for future validation and with potential application for the improvement of crop productivity under cold stress.
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Claims 5
Claim · model-written summary
Cold stress significantly reduced sorghum photosynthetic CO2 uptake.
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cold stress significantly reduced the rate of photosynthetic CO2 uptake of sorghum plants”
Claim · model-written summary
GWAS identified 143 unique genomic regions associated with photosynthetic traits or derived variables.
- Taxon
- Sorghum bicolor
Sorghum bicolort0 - Outcome
- unique genomic regionse0
- Value
- 143e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a total of 143 unique genomic regions were discovered associated with at least one trait in a particular treatment or with derived variables”
t0“Sorghum bicolor”
Claim · model-written summary
Ten regions were consistently identified across gas exchange and chlorophyll fluorescence traits.
- Taxon
- Sorghum bicolorSorghum bicolort0
- Outcome
- regionse0
- Value
- Tene0
- Qualifier
- chromosomes 3, 4, 6, 7, and 8e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ten regions on chromosomes 3, 4, 6, 7, and 8 that harbor multiple significant markers in linkage disequilibrium (LD) were consistently identified in gas exchange and chlorophyll fluorescence traits”
t0“Sorghum bicolor”
Claim · model-written summary
Candidate genes in those intervals had predicted functions related to carotenoids, phytohormones, thioredoxin, PSI components and antioxidants.
- Taxon
- Sorghum bicolorSorghum bicolort0
- Gene
- candidate genese0
- Outcome
- predicted functions related to carotenoids, phytohormones, thioredoxin, components of PSI, and antioxidantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Several candidate genes within those intervals have predicted functions related to carotenoids, phytohormones, thioredoxin, components of PSI, and antioxidants”
t0“Sorghum bicolor”
Claim · model-written summary
The identified regions were proposed for future validation and potential crop productivity improvement under cold stress.
- Taxon
- Sorghum bicolorSorghum bicolort0
- Outcome
- future validation and with potential application for the improvement of crop productivity under cold stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These regions represent the most promising results for future validation and with potential application for the improvement of crop productivity under cold stress”
t0“Sorghum bicolor”
The same questions in other papers
cold · physiology: photosynthesis · SorghumPositive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
- negative
3 papers more in this group
See all 7 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.