Abstract
Relative sensitivity of selected vegetable and weed seedlings to ultraviolet-B (UV-B) radiation (280–320 nm) was investigated. Seedlings were grown for 4 weeks in a greenhouse, in chambers equipped with UV-B-emitting fluorescent tubes and Mylar (control) and cellulose acetate (UV-B) filters. UV-B radiation reduced seedling height, leaf area, and leaf fresh weight in tomato ( Lycopersicon esculentum `Cour Di Bue'), broccoli ( Brassica oleracea var. Italica `Purple Sprouting'), cabbage ( Brassica oleracea var. Capitata `Red Drumhead'), and cucumber ( Cucumis sativus `Straight Eight'), leaf area and leaf fresh weight in beet ( Beta vulgaris `Cylindra' and `Early Wonder'), seedling height and leaf area in spinach ( Spinacia oleracea `Long Standing Bloomsdale'), lettuce ( Lactuca sativa ` `Red Salad Bowl Everest') and `Savoy' cabbage, and seedling height in `Chinese Tip Top' cabbage and lettuce (`Saladin'). `Winterton' cabbage was not affected. UV-B radiation decreased leaf area and leaf fresh weight in common chickweed ( Stellaria media ) and corn spurry ( Spergula arvensis ) and seedling height in green foxtail ( Setaria viridis ) and redroot pigweed ( Amaranthus retroflexus ). Tillering was stimulated in response to UV-B in green foxtail. There was no effect of UV-B on lady's-thumb ( Polygonum persicaria ) growth. Leaf number was not affected by exposure to UV-B in any species. The differential morphological sensitivity of vegetable and weed seedlings may result in altered competitive relationships under enhanced UV-B levels expected with the depletion of the earth's ozone layer.
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Claims 10
Claim · model-written summary
UV-B reduced seedling height, leaf area and leaf fresh weight in tomato, broccoli, cabbage and cucumber.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- UV-B radiatione0
- Outcome
- seedling height, leaf area, and leaf fresh weighte0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UV-B radiation reduced seedling height, leaf area, and leaf fresh weight in tomato ( Lycopersicon esculentum `Cour Di Bue'), broccoli ( Brassica oleracea var. Italica `Purple Sprouting'), cabbage ( Brassica oleracea var. Capitata `Red Drumhead'), and cucumber ( Cucumis sativus `Straight Eight')”
Claim · model-written summary
UV-B reduced leaf area and leaf fresh weight in beet.
- Taxon
- beet
Beta vulgarise0 - Treatment
- UV-B radiatione1
- Outcome
- leaf area and leaf fresh weighte0
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf area and leaf fresh weight in beet ( Beta vulgaris `Cylindra' and `Early Wonder')”
e1“UV-B radiation reduced seedling height, leaf area, and leaf fresh weight in tomato”
Claim · model-written summary
UV-B reduced seedling height and leaf area in spinach, lettuce and Savoy cabbage.
- Taxon
- spinach
Spinacia oleraceae0 - Treatment
- UV-B radiatione1
- Outcome
- seedling height and leaf areae0
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedling height and leaf area in spinach ( Spinacia oleracea `Long Standing Bloomsdale'), lettuce ( Lactuca sativa ` `Red Salad Bowl Everest') and `Savoy' cabbage”
e1“UV-B radiation reduced seedling height, leaf area, and leaf fresh weight in tomato”
Claim · model-written summary
UV-B reduced seedling height in Chinese Tip Top cabbage and Saladin lettuce.
- Taxon
- cabbage
Brassica oleracea var. capitatae0 - Treatment
- UV-B radiatione1
- Outcome
- seedling heighte0
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedling height in `Chinese Tip Top' cabbage and lettuce (`Saladin')”
e1“UV-B radiation reduced seedling height, leaf area, and leaf fresh weight in tomato”
Claim · model-written summary
Winterton cabbage was unaffected by UV-B.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- UV-B radiatione1
- Outcome
- cabbagee0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“`Winterton' cabbage was not affected.”
e1“UV-B radiation reduced seedling height, leaf area, and leaf fresh weight in tomato”
Claim · model-written summary
UV-B decreased leaf area and fresh weight in common chickweed and corn spurry.
- Taxon
- common chickweede0
- Treatment
- UV-B radiatione0
- Outcome
- leaf area and leaf fresh weighte0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“UV-B radiation decreased leaf area and leaf fresh weight in common chickweed ( Stellaria media ) and corn spurry ( Spergula arvensis )”
Claim · model-written summary
UV-B decreased seedling height in green foxtail and redroot pigweed.
Not reportedComparator
Verbatim
e0“seedling height in green foxtail ( Setaria viridis ) and redroot pigweed ( Amaranthus retroflexus )”
e1“UV-B radiation decreased leaf area and leaf fresh weight in common chickweed”
Claim · model-written summary
UV-B stimulated tillering in green foxtail.
Not reportedComparator
Verbatim
e0“Tillering was stimulated in response to UV-B in green foxtail.”
Claim · model-written summary
UV-B did not affect lady's-thumb growth.
- Taxon
- lady's-thumb
Persicaria maculosae0 - Treatment
- UV-Be0
- Outcome
- growthe0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no effect of UV-B on lady's-thumb ( Polygonum persicaria ) growth.”
Claim · model-written summary
UV-B did not affect leaf number in any species.
- Taxon
- Selected Vegetable and Weed Seedlingst0
- Treatment
- UV-Be0
- Outcome
- Leaf numbere0
- Direction
- not affectede0
Not reportedComparator
Verbatim
e0“Leaf number was not affected by exposure to UV-B in any species.”
t0“Selected Vegetable and Weed Seedlings”
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See all 11 papers →8 of 10 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.