Abstract
Experiments were conducted under controlled environmental conditions to assess the impact of UV-B radiation (8 kJ m-2 d-1) and ozone (240 μg m-3) on seven spring barley (Hordeum vulgare L.) cultivars. It has been established that the impact of UV-B and ozone on various spring barley cultivars differs greatly and in most cases the cultivars which are tolerant to an impact of ozone are sensitive to UV-B and vice versa. The impact of both investigated stressors resulted in a more pronounced decrease in chlorophyll a than chlorophyll b content while the chlorophyll a/b ratio in the leaves of different spring barley cultivars has also decreased. The reaction of carotenoids differs greatly depending on a stressor. UV-B radiation causes a significant increase in the content of carotenoids which is most likely a defence reaction against high energy short-wave radiation. The impact of ozone, in contrast, resulted in a decrease in carotenoids in the leaves of different spring barley cultivars.
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Claims 8
Claim · model-written summary
Barley cultivar responses to UV-B and ozone varied greatly.
- Taxon
- spring barley
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Hordeum vulgaree0 - Material
- cultivarse0
- Outcome
- impact of UV-B and ozonee0
- Direction
- differs greatlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“It has been established that the impact of UV-B and ozone on various spring barley cultivars differs greatly and in most cases the cultivars which are tolerant to an impact of ozone are sensitive to UV-B and vice versa.”
Claim · model-written summary
Most cultivars tolerant of ozone were sensitive to UV-B, and vice versa.
- Taxon
- spring barleyHordeum vulgaree0
- Material
- cultivarse0
- Outcome
- tolerant to an impact of ozone are sensitive to UV-B and vice versae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It has been established that the impact of UV-B and ozone on various spring barley cultivars differs greatly and in most cases the cultivars which are tolerant to an impact of ozone are sensitive to UV-B and vice versa.”
Claim · model-written summary
Both stressors reduced chlorophyll a more than chlorophyll b.
- Taxon
- spring barleyHordeum vulgaree0
- Organ / stage
- leavese0
- Treatment
- both investigated stressorse0
- Outcome
- chlorophyll ae0
- Direction
- more pronounced decreasee0
- Comparator
- chlorophyll b contente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The impact of both investigated stressors resulted in a more pronounced decrease in chlorophyll a than chlorophyll b content while the chlorophyll a/b ratio in the leaves of different spring barley cultivars has also decreased.”
Claim · model-written summary
Both stressors decreased leaf chlorophyll a/b ratio.
- Taxon
- spring barleyHordeum vulgaree0
- Organ / stage
- leavese0
- Treatment
- both investigated stressorse0
- Outcome
- chlorophyll a/b ratioe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The impact of both investigated stressors resulted in a more pronounced decrease in chlorophyll a than chlorophyll b content while the chlorophyll a/b ratio in the leaves of different spring barley cultivars has also decreased.”
Claim · model-written summary
Carotenoid responses differed greatly between the stressors.
- Taxon
- Spring BarleyHordeum vulgaret0
- Treatment
- stressore0
- Outcome
- reaction of carotenoidse0
- Direction
- differs greatlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reaction of carotenoids differs greatly depending on a stressor.”
t0“Spring Barley”
Claim · model-written summary
UV-B significantly increased carotenoid content.
- Taxon
- Spring BarleyHordeum vulgaret0
- Treatment
- UV-B radiatione0
- Outcome
- content of carotenoidse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UV-B radiation causes a significant increase in the content of carotenoids which is most likely a defence reaction against high energy short-wave radiation.”
t0“Spring Barley”
Claim · model-written summary
The authors interpret the UV-B carotenoid rise as a probable defence reaction.
- Taxon
- Spring BarleyHordeum vulgaret0
- Outcome
- increase in the content of carotenoidse0
- Qualifier
- most likely a defence reaction against high energy short-wave radiatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UV-B radiation causes a significant increase in the content of carotenoids which is most likely a defence reaction against high energy short-wave radiation.”
t0“Spring Barley”
Claim · model-written summary
Ozone decreased leaf carotenoids.
- Taxon
- spring barleyHordeum vulgaree0
- Organ / stage
- leavese0
- Treatment
- ozonee0
- Outcome
- carotenoidse0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The impact of ozone, in contrast, resulted in a decrease in carotenoids in the leaves of different spring barley cultivars.”
The same questions in other papers
uv · physiology: pigments · Hordeum vulgare (barley)Results differ
1 paper in the same direction as this paper · 5 in the opposite direction
- no effect
- negative
- negative
3 papers more in this group
See all 7 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.