Abstract
Abstract— Supplementary UVB radiation caused the down‐regulation of transcripts of the photosynthetic genes Lhcb and psbA in fully expanded pea leaves. This response was less marked in apical buds and was ameliorated by high light. The effect of UVB on leaves was mimicked by free radical generators and prevented by antioxidant feeding. Under UVB, active oxygen species levels, determined by level of lipid peroxides, was highest in leaves under low light and lower under high light and in buds. Activities of ascorbate peroxidase, glutathione reductase and superoxide dismutase were increased in response to UVB irradiation and were higher under high light and in buds. These results indicate that active oxygen species are involved in the UVB signal pathway leading to the down‐regulation of photosynthetic genes. Furthermore, they suggest that the antioxidant capacity of plant tissue determines the susceptibility of these transcripts to UVB radiation.
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Claims 10
Claim · model-written summary
Supplementary UVB radiation reduced transcripts of the photosynthetic genes Lhcb and psbA in fully expanded pea leaves.
- Taxon
- pea
Lathyrus oleraceuse0 - Organ / stage
- fully expanded pea leavese0
- Treatment
- Supplementary UVB radiatione0
- Gene
- Lhcb and psbAe0
- Outcome
- transcripts of the photosynthetic genese0
- Direction
- down‐regulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Supplementary UVB radiation caused the down‐regulation of transcripts of the photosynthetic genes Lhcb and psbA in fully expanded pea leaves”
Claim · model-written summary
The UVB-induced response of photosynthetic transcripts was less marked in apical buds.
- Taxon
- peaLathyrus oleraceuse0
- Organ / stage
- apical budse1
- Outcome
- responsee1
- Direction
- less markede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Supplementary UVB radiation caused the down‐regulation of transcripts of the photosynthetic genes Lhcb and psbA in fully expanded pea leaves”
e1“This response was less marked in apical buds and was ameliorated by high light”
Claim · model-written summary
High light ameliorated the UVB-induced response of photosynthetic transcripts.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- high lighte1
- Outcome
- responsee1
- Direction
- amelioratede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Supplementary UVB radiation caused the down‐regulation of transcripts of the photosynthetic genes Lhcb and psbA in fully expanded pea leaves”
e1“This response was less marked in apical buds and was ameliorated by high light”
Claim · model-written summary
Free radical generators mimicked the effect of UVB on pea leaves.
- Taxon
- PeaLathyrus oleraceust0
- Organ / stage
- leavese2
- Treatment
- free radical generatorse2
- Outcome
- effect of UVB on leavese2
- Direction
- mimickede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea (Pisum sativum L.)”
e2“The effect of UVB on leaves was mimicked by free radical generators and prevented by antioxidant feeding”
Claim · model-written summary
Antioxidant feeding prevented the effect of UVB on pea leaves.
- Taxon
- PeaLathyrus oleraceust0
- Organ / stage
- leavese2
- Treatment
- antioxidant feedinge2
- Outcome
- effect of UVB on leavese2
- Direction
- preventede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea (Pisum sativum L.)”
e2“The effect of UVB on leaves was mimicked by free radical generators and prevented by antioxidant feeding”
Claim · model-written summary
Under UVB, active oxygen species levels were highest in leaves under low light and lower under high light and in buds.
- Taxon
- PeaLathyrus oleraceust0
- Organ / stage
- leavese3
- Treatment
- UVBe3
- Outcome
- active oxygen species levelse3
- Direction
- higheste3
- Qualifier
- lower under high light and in budse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea (Pisum sativum L.)”
e3“Under UVB, active oxygen species levels, determined by level of lipid peroxides, was highest in leaves under low light and lower under high light and in buds”
Claim · model-written summary
UVB irradiation increased the activities of ascorbate peroxidase, glutathione reductase and superoxide dismutase in pea.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- UVB irradiatione4
- Gene
- ascorbate peroxidase, glutathione reductase and superoxide dismutasee4
- Outcome
- Activitiese4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea (Pisum sativum L.)”
e4“Activities of ascorbate peroxidase, glutathione reductase and superoxide dismutase were increased in response to UVB irradiation and were higher under high light and in buds”
Claim · model-written summary
Antioxidant enzyme activities were higher under high light and in buds.
- Taxon
- PeaLathyrus oleraceust0
- Organ / stage
- budse4
- Treatment
- high lighte4
- Gene
- ascorbate peroxidase, glutathione reductase and superoxide dismutasee4
- Outcome
- Activitiese4
- Direction
- highere4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea (Pisum sativum L.)”
e4“Activities of ascorbate peroxidase, glutathione reductase and superoxide dismutase were increased in response to UVB irradiation and were higher under high light and in buds”
Claim · model-written summary
Active oxygen species are involved in the UVB signal pathway leading to down-regulation of photosynthetic genes in pea.
- Taxon
- PeaLathyrus oleraceust0
- Compound
- active oxygen speciese6
- Outcome
- down‐regulation of photosynthetic genese6
- Qualifier
- UVB signal pathwaye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea (Pisum sativum L.)”
e6“These results indicate that active oxygen species are involved in the UVB signal pathway leading to the down‐regulation of photosynthetic genes”
Claim · model-written summary
The antioxidant capacity of pea tissue may determine how susceptible these transcripts are to UVB radiation.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- susceptibility of these transcripts to UVB radiatione7
- Qualifier
- antioxidant capacity of plant tissuee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea (Pisum sativum L.)”
e7“Furthermore, they suggest that the antioxidant capacity of plant tissue determines the susceptibility of these transcripts to UVB radiation”
The same questions in other papers
uv · molecular: expression · Lathyrus oleraceus (pea)Positive and negative results
4 papers in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
5 papers more in this group
See all 9 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.