Abstract
The increase in the concentration of CO2 in the atmosphere has attracted widespread attention. To explore the effect of elevated CO2 on lettuce growth and better understand the mechanism of elevated CO2 in lettuce cultivation, 3 kinds of lettuce with 4 real leaves were selected and planted in a solar greenhouse. One week later, CO2 was applied from 8:00 a.m. to 10:00 a.m. on sunny days for 30 days. The results showed that the growth potential of lettuce was enhanced under CO2 enrichment. The content of vitamin C and chlorophyll in the three lettuce varieties increased, and the content of nitrate nitrogen decreased. The light saturation point and net photosynthetic rate of leaves increased, and the light compensation point decreased. Transcriptome analysis showed that there were 217 differentially expressed genes (DEGs) shared by the three varieties, among which 166 were upregulated, 44 were downregulated, and 7 DEGs were inconsistent in the three materials. Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis showed that these DEGs involved mainly the ethylene signaling pathway, jasmonic acid signaling pathway, porphyrin and chlorophyll metabolism pathway, starch and sucrose metabolism pathway, etc. Forty-one DEGs in response to CO2 enrichment were screened out by Gene Ontology (GO) analysis, and the biological processes involved were consistent with KEGG analysis. which suggested that the growth and nutritional quality of lettuce could be improved by increasing the enzyme activity and gene expression levels of photosynthesis, hormone signaling and carbohydrate metabolism. The results laid a theoretical foundation for lettuce cultivation in solar greenhouses and the application of CO2 fertilization technology.
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Claims 13
Claim · model-written summary
CO2 enrichment enhanced lettuce growth potential.
- Taxon
- lettuce
Lactuca sativae0 - Treatment
- CO2 enrichmente0
- Outcome
- growth potentiale0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the growth potential of lettuce was enhanced under CO2 enrichment”
Claim · model-written summary
Vitamin C and chlorophyll content rose in three lettuce varieties.
- Taxon
- lettuceLactuca sativae0
- Treatment
- CO2 enrichmente1
- Outcome
- content of vitamin C and chlorophylle0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The content of vitamin C and chlorophyll in the three lettuce varieties increased”
e1“under CO2 enrichment”
Claim · model-written summary
Nitrate nitrogen content fell.
- Taxon
- Lactuca sativaLactuca sativat0
- Treatment
- CO2 enrichmente1
- Outcome
- content of nitrate nitrogene0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the content of nitrate nitrogen decreased”
e1“under CO2 enrichment”
t0“Lactuca sativa”
Claim · model-written summary
Leaf light saturation point and net photosynthetic rate increased.
- Taxon
- Lactuca sativaLactuca sativat0
- Treatment
- CO2 enrichmente1
- Outcome
- light saturation point and net photosynthetic ratee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The light saturation point and net photosynthetic rate of leaves increased”
e1“under CO2 enrichment”
t0“Lactuca sativa”
Claim · model-written summary
Light compensation point decreased.
- Taxon
- Lactuca sativaLactuca sativat0
- Treatment
- CO2 enrichmente1
- Outcome
- light compensation pointe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the light compensation point decreased”
e1“under CO2 enrichment”
t0“Lactuca sativa”
Claim · model-written summary
The three varieties shared 217 differentially expressed genes.
- Taxon
- Lactuca sativaLactuca sativat0
- Outcome
- differentially expressed genes (DEGs) shared by the three varietiese0
- Value
- 217e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“217 differentially expressed genes (DEGs) shared by the three varieties”
t0“Lactuca sativa”
Claim · model-written summary
Among shared genes, 166 were upregulated.
- Taxon
- Lactuca sativaLactuca sativat0
- Outcome
- upregulatede0
- Value
- 166e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“166 were upregulated”
t0“Lactuca sativa”
Claim · model-written summary
Among shared genes, 44 were downregulated.
- Taxon
- Lactuca sativaLactuca sativat0
- Outcome
- downregulatede0
- Value
- 44e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“44 were downregulated”
t0“Lactuca sativa”
Claim · model-written summary
Seven DEGs differed inconsistently among the materials.
- Taxon
- Lactuca sativaLactuca sativat0
- Outcome
- DEGs were inconsistent in the three materialse0
- Value
- 7e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“7 DEGs were inconsistent in the three materials”
t0“Lactuca sativa”
Claim · model-written summary
DEGs primarily involved ethylene and jasmonic acid signaling and porphyrin, chlorophyll, starch and sucrose metabolism.
- Taxon
- Lactuca sativaLactuca sativat0
- Outcome
- ethylene signaling pathway, jasmonic acid signaling pathway, porphyrin and chlorophyll metabolism pathway, starch and sucrose metabolism pathwaye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these DEGs involved mainly the ethylene signaling pathway, jasmonic acid signaling pathway, porphyrin and chlorophyll metabolism pathway, starch and sucrose metabolism pathway”
t0“Lactuca sativa”
Claim · model-written summary
GO analysis screened 41 DEGs responding to CO2 enrichment.
- Taxon
- Lactuca sativaLactuca sativat0
- Outcome
- DEGs in response to CO2 enrichmente0
- Value
- Forty-onee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Forty-one DEGs in response to CO2 enrichment were screened out by Gene Ontology (GO) analysis”
t0“Lactuca sativa”
Claim · model-written summary
GO biological processes agreed with KEGG analysis.
- Taxon
- Lactuca sativaLactuca sativat0
- Outcome
- biological processes involvede0
- Comparator
- KEGG analysise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the biological processes involved were consistent with KEGG analysis”
t0“Lactuca sativa”
Claim · model-written summary
Authors suggest enhanced photosynthesis, hormone signaling and carbohydrate metabolism underlie better growth and nutritional quality.
- Taxon
- lettuceLactuca sativae0
- Outcome
- growth and nutritional qualitye0
- Qualifier
- increasing the enzyme activity and gene expression levels of photosynthesis, hormone signaling and carbohydrate metabolisme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth and nutritional quality of lettuce could be improved by increasing the enzyme activity and gene expression levels of photosynthesis, hormone signaling and carbohydrate metabolism”
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See all 42 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.