Abstract
Light‐ and benzyladenine‐induced reversal of the changes in chlorophyll content and catalase activity were studied in the attached first leaf of Oryza sativa L. cv. Bala, kept in darkness for different periods before maturation. Dark treatment caused a decrease in chlorophyll content and catalase activity at all times. Light treatment of dark‐incubated seedlings at different periods before maturation reversed the dark‐induced effect on chlorophyll content, catalase activity and dry weight and also caused a further rise in chlorophyll content compared to initial values. In darkness, the application of benzyladenine replaced the light effect in maintaining catalase activity. Chlorophyll content was also maintained by initially applied benzyladenine. Benzyladenine did not promote the photoinduced maintenance and increase in chlorophyll content and catalase activity at any time. Treatment with hydrogen peroxide, glycolate and amizol resulted in an accelerated chlorophyll breakdown and had varied effects on catalase levels. Chlorophyll decrease due to peroxide accumulation was to some extent reversible by benzyladenine, but the hormone had no effect on the peroxide‐induced decrease in catalase activity. Development of catalase is light dependent. Benzyladenine stabilises the enzyme but has no effect on its synthesis.
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Claims 17
Claim · model-written summary
Dark treatment decreased chlorophyll content and catalase activity at all times.
- Taxon
- Oryza sativa L.
Oryza sativae0 - Material
- cv. Balae0
- Organ / stage
- attached first leafe0
- Treatment
- Dark treatmente1
- Outcome
- chlorophyll content and catalase activitye1
- Direction
- decreasee1
- Qualifier
- at all timese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“attached first leaf of Oryza sativa L. cv. Bala”
e1“Dark treatment caused a decrease in chlorophyll content and catalase activity at all times”
Claim · model-written summary
Light treatment reversed the dark-induced decline in chlorophyll content, catalase activity and dry weight.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- cv. Balae0
- Organ / stage
- attached first leafe0
- Treatment
- Light treatmente1
- Outcome
- chlorophyll content, catalase activity and dry weighte2
- Direction
- reversede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“attached first leaf of Oryza sativa L. cv. Bala”
e1“Light treatment of dark‐incubated seedlings at different periods before maturation”
e2“reversed the dark‐induced effect on chlorophyll content, catalase activity and dry weight”
Claim · model-written summary
Light treatment caused a further rise in chlorophyll content compared with initial values.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- cv. Balae0
- Organ / stage
- attached first leafe0
- Treatment
- Light treatmente1
- Outcome
- chlorophyll contente2
- Direction
- further risee2
- Comparator
- initial valuese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“attached first leaf of Oryza sativa L. cv. Bala”
e1“Light treatment of dark‐incubated seedlings at different periods before maturation”
e2“caused a further rise in chlorophyll content compared to initial values”
Claim · model-written summary
In darkness, benzyladenine replaced the light effect in maintaining catalase activity.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- cv. Balae0
- Organ / stage
- attached first leafe0
- Treatment
- application of benzyladeninee1
- Outcome
- catalase activitye1
- Direction
- maintaininge1
- Comparator
- light effecte1
- Setting
- In darknesse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“attached first leaf of Oryza sativa L. cv. Bala”
e1“In darkness, the application of benzyladenine replaced the light effect in maintaining catalase activity”
Claim · model-written summary
Initially applied benzyladenine maintained chlorophyll content.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- cv. Balae0
- Organ / stage
- attached first leafe0
- Treatment
- initially applied benzyladeninee1
- Outcome
- Chlorophyll contente1
- Direction
- maintainede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“attached first leaf of Oryza sativa L. cv. Bala”
e1“Chlorophyll content was also maintained by initially applied benzyladenine”
Claim · model-written summary
Benzyladenine did not promote the photoinduced maintenance and increase in chlorophyll content and catalase activity at any time.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- cv. Balae0
- Organ / stage
- attached first leafe0
- Treatment
- Benzyladeninee1
- Outcome
- maintenance and increase in chlorophyll content and catalase activitye1
- Direction
- did not promotee1
- Qualifier
- at any timee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“attached first leaf of Oryza sativa L. cv. Bala”
e1“Benzyladenine did not promote the photoinduced maintenance and increase in chlorophyll content and catalase activity at any time”
Claim · model-written summary
Hydrogen peroxide accelerated chlorophyll breakdown in rice leaves.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- cv. Balae0
- Organ / stage
- attached first leafe0
- Treatment
- hydrogen peroxidee1
- Outcome
- chlorophyll breakdowne1
- Direction
- acceleratede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“attached first leaf of Oryza sativa L. cv. Bala”
e1“Treatment with hydrogen peroxide, glycolate and amizol resulted in an accelerated chlorophyll breakdown”
Claim · model-written summary
Glycolate accelerated chlorophyll breakdown in rice leaves.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- cv. Balae0
- Organ / stage
- attached first leafe0
- Treatment
- glycolatee1
- Outcome
- chlorophyll breakdowne1
- Direction
- acceleratede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“attached first leaf of Oryza sativa L. cv. Bala”
e1“Treatment with hydrogen peroxide, glycolate and amizol resulted in an accelerated chlorophyll breakdown”
Claim · model-written summary
Amizol accelerated chlorophyll breakdown in rice leaves.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- cv. Balae0
- Organ / stage
- attached first leafe0
- Treatment
- amizole1
- Outcome
- chlorophyll breakdowne1
- Direction
- acceleratede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“attached first leaf of Oryza sativa L. cv. Bala”
e1“Treatment with hydrogen peroxide, glycolate and amizol resulted in an accelerated chlorophyll breakdown”
Claim · model-written summary
Hydrogen peroxide had varied effects on catalase levels.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- cv. Balae0
- Organ / stage
- attached first leafe0
- Treatment
- hydrogen peroxidee1
- Outcome
- catalase levelse2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“attached first leaf of Oryza sativa L. cv. Bala”
e1“Treatment with hydrogen peroxide, glycolate and amizol resulted in an accelerated chlorophyll breakdown”
e2“had varied effects on catalase levels”
Claim · model-written summary
Glycolate had varied effects on catalase levels.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- cv. Balae0
- Organ / stage
- attached first leafe0
- Treatment
- glycolatee1
- Outcome
- catalase levelse2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“attached first leaf of Oryza sativa L. cv. Bala”
e1“Treatment with hydrogen peroxide, glycolate and amizol resulted in an accelerated chlorophyll breakdown”
e2“had varied effects on catalase levels”
Claim · model-written summary
Amizol had varied effects on catalase levels.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- cv. Balae0
- Organ / stage
- attached first leafe0
- Treatment
- amizole1
- Outcome
- catalase levelse2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“attached first leaf of Oryza sativa L. cv. Bala”
e1“Treatment with hydrogen peroxide, glycolate and amizol resulted in an accelerated chlorophyll breakdown”
e2“had varied effects on catalase levels”
Claim · model-written summary
Benzyladenine partly reversed the chlorophyll decrease caused by peroxide accumulation.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- cv. Balae0
- Organ / stage
- attached first leafe0
- Treatment
- benzyladeninee1
- Compound
- peroxidee1
- Outcome
- Chlorophyll decreasee1
- Direction
- to some extent reversiblee1
- Qualifier
- to some extente1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“attached first leaf of Oryza sativa L. cv. Bala”
e1“Chlorophyll decrease due to peroxide accumulation was to some extent reversible by benzyladenine”
Claim · model-written summary
Benzyladenine had no effect on the peroxide-induced decrease in catalase activity.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- cv. Balae0
- Organ / stage
- attached first leafe0
- Treatment
- hormonee1
- Outcome
- decrease in catalase activitye2
- Direction
- no effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“attached first leaf of Oryza sativa L. cv. Bala”
e1“the hormone had no effect”
e2“decrease in catalase activity”
Claim · model-written summary
Development of catalase in rice leaves is light dependent.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- cv. Balae0
- Organ / stage
- attached first leafe0
- Outcome
- Development of catalasee1
- Qualifier
- light dependente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“attached first leaf of Oryza sativa L. cv. Bala”
e1“Development of catalase is light dependent”
Claim · model-written summary
Benzyladenine stabilised the enzyme catalase in rice leaves.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- cv. Balae0
- Organ / stage
- attached first leafe0
- Treatment
- Benzyladeninee1
- Outcome
- the enzymee1
- Direction
- stabilisese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“attached first leaf of Oryza sativa L. cv. Bala”
e1“Benzyladenine stabilises the enzyme but has no effect on its synthesis”
Claim · model-written summary
Benzyladenine had no effect on the synthesis of catalase in rice leaves.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- cv. Balae0
- Organ / stage
- attached first leafe0
- Treatment
- Benzyladeninee1
- Outcome
- its synthesise1
- Direction
- no effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“attached first leaf of Oryza sativa L. cv. Bala”
e1“Benzyladenine stabilises the enzyme but has no effect on its synthesis”
The same questions in other papers
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See all 16 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.