Abstract
Abstract— Plants of Vicia faba were grown in the field during early to midsummer while receiving two levels of supplemental UV‐B radiation. Light‐saturated photosynthesis and stomatal diffusive conductance of intact leaves did not show any indications of UV‐radiation damage. Supplemental UV treatment did cause increased concentrations of UV‐absorbing flavonoid pigments in leaf tissues and decreased epidermal transmittance of UV radiation. While epidermal transmittance was reduced 30% under the low‐UV treatment, the high‐UV treatment failed to elicit as large a change. However, total amounts of flavonoids in other leaf tissues did increase in response to the high‐UV treatment (up to 12% greater per unit leaf area than for control plants). This may have been a major factor protecting underlying photosynthetic tissues.
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Claims 6
Claim · model-written summary
Supplemental UV-B did not show damage to photosynthesis or stomatal conductance of Vicia faba leaves.
- Taxon
- Vicia faba
Vicia fabae1 - Organ / stage
- intact leavese2
- Treatment
- supplemental UV‐B radiatione1
- Outcome
- Light‐saturated photosynthesis and stomatal diffusive conductancee2
- Setting
- the fielde1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Plants of Vicia faba were grown in the field during early to midsummer while receiving two levels of supplemental UV‐B radiation”
e2“Light‐saturated photosynthesis and stomatal diffusive conductance of intact leaves did not show any indications of UV‐radiation damage”
Claim · model-written summary
Supplemental UV-B increased UV-absorbing flavonoid pigment concentrations in Vicia faba leaf tissues.
- Taxon
- Vicia fabaVicia fabae1
- Organ / stage
- leaf tissuese3
- Treatment
- Supplemental UV treatmente3
- Outcome
- concentrations of UV‐absorbing flavonoid pigmentse3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Plants of Vicia faba were grown in the field during early to midsummer while receiving two levels of supplemental UV‐B radiation”
e3“Supplemental UV treatment did cause increased concentrations of UV‐absorbing flavonoid pigments in leaf tissues and decreased epidermal transmittance of UV radiation”
Claim · model-written summary
Supplemental UV-B decreased epidermal transmittance of UV radiation in Vicia faba.
- Taxon
- Vicia fabaVicia fabae1
- Treatment
- Supplemental UV treatmente3
- Outcome
- epidermal transmittance of UV radiatione3
- Direction
- decreasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Plants of Vicia faba were grown in the field during early to midsummer while receiving two levels of supplemental UV‐B radiation”
e3“Supplemental UV treatment did cause increased concentrations of UV‐absorbing flavonoid pigments in leaf tissues and decreased epidermal transmittance of UV radiation”
Claim · model-written summary
The low-UV treatment reduced epidermal transmittance by 30% in Vicia faba.
- Taxon
- Vicia fabaVicia fabae1
- Treatment
- low‐UV treatmente4
- Outcome
- epidermal transmittancee4
- Direction
- reducede4
- Value
- 30%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Plants of Vicia faba were grown in the field during early to midsummer while receiving two levels of supplemental UV‐B radiation”
e4“While epidermal transmittance was reduced 30% under the low‐UV treatment”
Claim · model-written summary
The high-UV treatment produced a smaller change in epidermal transmittance than the low-UV treatment.
- Taxon
- Vicia fabaVicia fabae1
- Treatment
- high‐UV treatmente5
- Outcome
- epidermal transmittancee4
- Direction
- failed to elicit as large a changee5
- Comparator
- low‐UV treatmente4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Plants of Vicia faba were grown in the field during early to midsummer while receiving two levels of supplemental UV‐B radiation”
e4“While epidermal transmittance was reduced 30% under the low‐UV treatment”
e5“the high‐UV treatment failed to elicit as large a change”
Claim · model-written summary
High-UV treatment increased total flavonoids in other leaf tissues by up to 12% per unit leaf area relative to control plants.
- Taxon
- Vicia fabaVicia fabae1
- Organ / stage
- other leaf tissuese6
- Treatment
- high‐UV treatmente6
- Outcome
- total amounts of flavonoids in other leaf tissuese6
- Direction
- increasee6
- Value
- up to 12%e6
- Comparator
- control plantse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Plants of Vicia faba were grown in the field during early to midsummer while receiving two levels of supplemental UV‐B radiation”
e6“total amounts of flavonoids in other leaf tissues did increase in response to the high‐UV treatment (up to 12% greater per unit leaf area than for control plants)”
The same questions in other papers
uv · physiology: photosynthesis · Vicia faba (faba bean)Results agree
5 papers in the same direction as this paper
- no effect
- negative
- negative
2 papers more in this group
See all 6 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.