Abstract
Abstract. Exposure of young bean foliage to acid rain induces free‐radical‐mediated lipid peroxidation and causes the same disruptive changes in the molecular organization of membrane lipid‐bilayers that are observed during natural leaf senescence. Young plants were misted daily for 7d with simulated acid rain for a 2h period. Wide angle X‐ray diffraction revealed the presence of gel‐phase lipid in a fraction containing predominantly chloroplast membranes isolated from treated leaves, and the lipid‐phase transition temperature of these membranes rose from below −30°C to ∼ 36°C over the treatment period. The formation of gel‐phase lipid is known to be associated with lipid peroxidation, and it is therefore significant that production of ethane and levels of malondialdehyde in the leaves, which are both products of lipid peroxidation, rose throughout the treatment period. There was also increased production of ethylene and superoxide radical, which are typical responses of plant tissue to toxicity.
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Claims 6
Claim · model-written summary
Acid rain induced lipid peroxidation in young bean foliage.
Not reportedComparator
Verbatim
e1“Exposure of young bean foliage to acid rain induces free‐radical‐mediated lipid peroxidation and causes the same disruptive changes in the molecular organization of membrane lipid‐bilayers that are observed during natural leaf senescence”
Claim · model-written summary
Acid rain caused disruptive changes in the molecular organization of bean leaf membrane lipid bilayers, similar to those seen in natural leaf senescence.
Verbatim
e1“Exposure of young bean foliage to acid rain induces free‐radical‐mediated lipid peroxidation and causes the same disruptive changes in the molecular organization of membrane lipid‐bilayers that are observed during natural leaf senescence”
Claim · model-written summary
Gel-phase lipid was present in chloroplast membrane fractions from bean leaves treated with acid rain.
Verbatim
e1“Exposure of young bean foliage to acid rain induces free‐radical‐mediated lipid peroxidation and causes the same disruptive changes in the molecular organization of membrane lipid‐bilayers that are observed during natural leaf senescence”
e2“Wide angle X‐ray diffraction revealed the presence of gel‐phase lipid in a fraction containing predominantly chloroplast membranes isolated from treated leaves”
Claim · model-written summary
Lipid-phase transition temperature of bean leaf membranes rose from below −30°C to about 36°C over 7 days of simulated acid rain.
- Taxon
- beane1
- Treatment
- simulated acid raine4
- Outcome
- lipid‐phase transition temperaturee3
- Direction
- rosee3
- Value
- from below −30°C to ∼ 36°Ce3
- Qualifier
- over the treatment periode3
Not reportedComparator
Verbatim
e1“Exposure of young bean foliage to acid rain induces free‐radical‐mediated lipid peroxidation and causes the same disruptive changes in the molecular organization of membrane lipid‐bilayers that are observed during natural leaf senescence”
e3“the lipid‐phase transition temperature of these membranes rose from below −30°C to ∼ 36°C over the treatment period”
e4“Young plants were misted daily for 7d with simulated acid rain for a 2h period”
Claim · model-written summary
Simulated acid rain increased production of ethane and malondialdehyde levels in bean leaves.
- Taxon
- beane1
- Organ / stage
- leavese5
- Treatment
- simulated acid raine4
- Outcome
- production of ethane and levels of malondialdehydee5
- Direction
- rosee5
- Qualifier
- throughout the treatment periode5
Not reportedComparator
Verbatim
e1“Exposure of young bean foliage to acid rain induces free‐radical‐mediated lipid peroxidation and causes the same disruptive changes in the molecular organization of membrane lipid‐bilayers that are observed during natural leaf senescence”
e4“Young plants were misted daily for 7d with simulated acid rain for a 2h period”
e5“production of ethane and levels of malondialdehyde in the leaves, which are both products of lipid peroxidation, rose throughout the treatment period”
Claim · model-written summary
Simulated acid rain increased ethylene and superoxide radical production in bean leaves.
- Taxon
- beane1
- Treatment
- simulated acid raine4
- Outcome
- production of ethylene and superoxide radicale6
- Direction
- increasede6
Not reportedComparator
Verbatim
e1“Exposure of young bean foliage to acid rain induces free‐radical‐mediated lipid peroxidation and causes the same disruptive changes in the molecular organization of membrane lipid‐bilayers that are observed during natural leaf senescence”
e4“Young plants were misted daily for 7d with simulated acid rain for a 2h period”
e6“There was also increased production of ethylene and superoxide radical, which are typical responses of plant tissue to toxicity”
The same questions in other papers
rainfall · soil: physics · Phaseolus vulgaris (common bean)Results agree
1 paper in the same direction as this paper
- negative
rainfall · molecular: metabolites · Phaseolus vulgaris (common bean)Results agree
2 papers in the same direction as this paper
- negative
- negative
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.