Abstract
ABSTRACT Because of reductions in stratospheric ozone levels due to chlorofluoromethanes and other trace gases, there has been growing concern about the impact of possible increases in ultraviolet‐B (UV‐B) radiation. Until recently, most studies have focused on the effects of enhanced UV‐B levels, however, these have inherent technical difficulties. Ultraviolet‐B exclusion studies afford the investigator a rapid means of assessing the effects of present levels of solar UV‐B radiation. Unlike UV‐B enhancement, UV‐B exclusion studies use the sun as the source of UV‐B radiation and selective filters to transmit or absorb this portion of sunlight. This article describes a simple, inexpensive system that was used over a 3‐yr period to determine seedling response of cucumber ( Cucumis sativus L.), soybean [ Glycine max (L.) Merr.], and New Zealand spinach [( Tetragonia tetragonoides (Pallas) Kuntze] to UV‐B exclusion. Plants of all three species grown outdoors under UV‐B absorbing polyester showed an increase in leaf enlargement and biomass accumulation in comparison to those grown under UV‐B transmitting cellulose acetate filters. The basic materials used consist of plastic window boxes, plastic filters that transmit or absorb in the UV‐B region, wire supports, and binder clips. This setup can be used to demonstrate basic principles of photobiology and stress physiology. It is ideal for students interested in conducting short‐term science projects on the effects of solar UV radiation.
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Claims 3
Claim · model-written summary
Cucumber seedlings grown outdoors under UV-B absorbing polyester showed increased leaf enlargement and biomass accumulation compared with UV-B transmitting cellulose acetate filters.
- Taxon
- cucumber
Cucumis sativuse1 - Treatment
- UV‐B absorbing polyestere2
- Outcome
- leaf enlargement and biomass accumulatione2
- Direction
- increasee2
- Comparator
- UV‐B transmitting cellulose acetate filterse2
- Setting
- outdoorse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“seedling response of cucumber ( Cucumis sativus L.), soybean [ Glycine max (L.) Merr.], and New Zealand spinach [( Tetragonia tetragonoides (Pallas) Kuntze] to UV‐B exclusion”
e2“Plants of all three species grown outdoors under UV‐B absorbing polyester showed an increase in leaf enlargement and biomass accumulation in comparison to those grown under UV‐B transmitting cellulose acetate filters”
Claim · model-written summary
Soybean seedlings grown outdoors under UV-B absorbing polyester showed increased leaf enlargement and biomass accumulation compared with UV-B transmitting cellulose acetate filters.
- Taxon
- soybean
Glycine maxe1 - Treatment
- UV‐B absorbing polyestere2
- Outcome
- leaf enlargement and biomass accumulatione2
- Direction
- increasee2
- Comparator
- UV‐B transmitting cellulose acetate filterse2
- Setting
- outdoorse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“seedling response of cucumber ( Cucumis sativus L.), soybean [ Glycine max (L.) Merr.], and New Zealand spinach [( Tetragonia tetragonoides (Pallas) Kuntze] to UV‐B exclusion”
e2“Plants of all three species grown outdoors under UV‐B absorbing polyester showed an increase in leaf enlargement and biomass accumulation in comparison to those grown under UV‐B transmitting cellulose acetate filters”
Claim · model-written summary
New Zealand spinach seedlings grown outdoors under UV-B absorbing polyester showed increased leaf enlargement and biomass accumulation compared with UV-B transmitting cellulose acetate filters.
Verbatim
e1“seedling response of cucumber ( Cucumis sativus L.), soybean [ Glycine max (L.) Merr.], and New Zealand spinach [( Tetragonia tetragonoides (Pallas) Kuntze] to UV‐B exclusion”
e2“Plants of all three species grown outdoors under UV‐B absorbing polyester showed an increase in leaf enlargement and biomass accumulation in comparison to those grown under UV‐B transmitting cellulose acetate filters”
The same questions in other papers
uv · growth · Cucumis sativus (cucumber)Results differ
9 papers in the same direction as this paper · 29 in the opposite direction
- negative
- negative
- negative
35 papers more in this group
See all 39 papers →uv · growth · Glycine max (soybean)Results differ
8 papers in the same direction as this paper · 41 in the opposite direction
- negative
- negative
- negative
46 papers more in this group
See all 50 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.