Abstract
Abstract Cabbage plants were grown under graded levels of nitrogen supply in nutrient solution (5, 50, 500 ppm N) or graded levels of light intensity (100, 61, 34% of natural light), and the effects of each treatment on the growth and 14CO2 and 15NO3-N assimilation of the plants were studied. As the nitrogen supply increased, the plant dry weight increased from 5 to 50 ppm N and decreased at 500 ppm N. Plants grown at 50 ppm N had the highest sugar content and the highest rate of 14 CO2 assimilation. This was why efficient cabbage-head development occurred at 50 ppm N. As the light intensity decreased, so the plant dry weight and the cabbage-head yield decreased, resulting from a decrease in the sugar content and in the rate of 14CO2 assimilation. The 15NO3-N uptake by the plants was smaller at a low light intensity than at a high light intensity, and in the plants at the low light intensity the incorporation of 15N into the 80% ethanol-insoluble fraction in the cabbage-head was impaired. The later the growth stage, at which 14CO2 was assimilated by the plants, the greater was the 14C-retention percentage at harvest time and the distribution of 14C into the cabbage-head. The 14C-retention percentage decreased with increase in the nitrogen supply or decrease in the light intensity.
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Claims 12
Claim · model-written summary
Increasing nitrogen supply from 5 to 50 ppm N increased cabbage plant dry weight.
- Taxon
- cabbage
Brassica oleracea var. capitatat0 - Treatment
- nitrogen supplye0
- Outcome
- plant dry weighte0
- Direction
- increasede0
- Qualifier
- from 5 to 50 ppm Ne0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cabbage-head formation”
e0“As the nitrogen supply increased, the plant dry weight increased from 5 to 50 ppm N and decreased at 500 ppm N”
Claim · model-written summary
Nitrogen supply at 500 ppm N decreased cabbage plant dry weight.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- nitrogen supplye0
- Outcome
- plant dry weighte0
- Direction
- decreasede0
- Qualifier
- at 500 ppm Ne0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cabbage-head formation”
e0“As the nitrogen supply increased, the plant dry weight increased from 5 to 50 ppm N and decreased at 500 ppm N”
Claim · model-written summary
Cabbage grown at 50 ppm N had the highest sugar content.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- 50 ppm Ne1
- Outcome
- sugar contente1
- Direction
- higheste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cabbage-head formation”
e1“Plants grown at 50 ppm N had the highest sugar content and the highest rate of 14 CO2 assimilation”
Claim · model-written summary
Cabbage grown at 50 ppm N had the highest rate of 14CO2 assimilation.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- 50 ppm Ne1
- Outcome
- rate of 14 CO2 assimilatione1
- Direction
- higheste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cabbage-head formation”
e1“Plants grown at 50 ppm N had the highest sugar content and the highest rate of 14 CO2 assimilation”
Claim · model-written summary
Growth at 50 ppm N explains efficient cabbage-head development through the highest sugar content.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- 50 ppm Ne2
- Outcome
- cabbage-head developmente2
- Qualifier
- highest sugar contente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cabbage-head formation”
e1“Plants grown at 50 ppm N had the highest sugar content and the highest rate of 14 CO2 assimilation”
e2“This was why efficient cabbage-head development occurred at 50 ppm N”
Claim · model-written summary
Decreasing light intensity decreased cabbage plant dry weight and cabbage-head yield.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- light intensitye3
- Outcome
- plant dry weight and the cabbage-head yielde3
- Direction
- decreasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cabbage-head formation”
e3“As the light intensity decreased, so the plant dry weight and the cabbage-head yield decreased, resulting from a decrease in the sugar content and in the rate of 14CO2 assimilation”
Claim · model-written summary
The decrease in cabbage dry weight and head yield under low light is attributed to lower sugar content and lower 14CO2 assimilation.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Outcome
- plant dry weight and the cabbage-head yielde3
- Qualifier
- decrease in the sugar content and in the rate of 14CO2 assimilatione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cabbage-head formation”
e3“As the light intensity decreased, so the plant dry weight and the cabbage-head yield decreased, resulting from a decrease in the sugar content and in the rate of 14CO2 assimilation”
Claim · model-written summary
Low light intensity made the 15NO3-N uptake by cabbage smaller than high light intensity.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- a low light intensitye4
- Outcome
- 15NO3-N uptakee4
- Direction
- smallere4
- Comparator
- high light intensitye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cabbage-head formation”
e4“The 15NO3-N uptake by the plants was smaller at a low light intensity than at a high light intensity”
Claim · model-written summary
Low light impaired incorporation of 15N into the 80% ethanol-insoluble fraction of the cabbage head.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- low light intensitye5
- Outcome
- incorporation of 15N into the 80% ethanol-insoluble fraction in the cabbage-heade5
- Direction
- impairede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cabbage-head formation”
e5“in the plants at the low light intensity the incorporation of 15N into the 80% ethanol-insoluble fraction in the cabbage-head was impaired”
Claim · model-written summary
The later the growth stage at which 14CO2 was assimilated, the greater the 14C-retention percentage at harvest.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- growth stagee6
- Outcome
- 14C-retention percentage at harvest timee6
- Direction
- greatere6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cabbage-head formation”
e6“The later the growth stage, at which 14CO2 was assimilated by the plants, the greater was the 14C-retention percentage at harvest time and the distribution of 14C into the cabbage-head”
Claim · model-written summary
The later the growth stage at which 14CO2 was assimilated, the greater the distribution of 14C into the cabbage head.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- growth stagee6
- Outcome
- distribution of 14C into the cabbage-heade6
- Direction
- greatere6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cabbage-head formation”
e6“The later the growth stage, at which 14CO2 was assimilated by the plants, the greater was the 14C-retention percentage at harvest time and the distribution of 14C into the cabbage-head”
Claim · model-written summary
The 14C-retention percentage decreased with increased nitrogen supply or decreased light intensity in cabbage.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- increase in the nitrogen supply or decrease in the light intensitye7
- Outcome
- 14C-retention percentagee7
- Direction
- decreasede7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cabbage-head formation”
e7“The 14C-retention percentage decreased with increase in the nitrogen supply or decrease in the light intensity”
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