Abstract
Cytokinins play an important role in controlling many of the processes that contribute to plant senescence. The aim of this study was to compare the effect of different cytokinins, especially the new aromatic cytokinin meta-topolin (mT), with kinetin (K), benzyladenine (BA), and zeatin (Z) on chlorophyll formation in etiolated cucumber cotyledons. Protein contents and peroxidase activities were also investigated. Exogenous application of cytokinins was effective in stimulating chlorophyll biosynthesis. mT was shown to be the most effective cytokinin in stimulating chlorophyll biosynthesis at low concentrations compared to the other cytokinins. mT treatments at 0.02-0.0002 mg/ml increased the amount of chlorophyll more than threefold compared with control cotyledons. BA stimulated the total chlorophyll content at 0.1-10 mg/ml concentrations, but inhibited at lower (0.01, 0.001 mg/ml) concentrations. K increased the chlorophyll amount at 1 mg/ml concentration to twice that of control cotyledons. Z stimulated the chlorophyll level at almost all the concentrations applied. The effects of the most effective concentrations of cytokinins used in this research on the chlorophyll level and on the protein content were examined. A doubling of protein content in 0.02 mg/ml-mT-treated cotyledons was observed, whereas Z, BA, and K increased the total protein to a lesser extent. BA was shown to have the greatest effect on peroxidase activity.
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Claims 12
Claim · model-written summary
Exogenous cytokinin application stimulated chlorophyll biosynthesis in cucumber cotyledons.
- Taxon
- cucumber
Cucumis sativust0 - Treatment
- Exogenous application of cytokininse1
- Outcome
- chlorophyll biosynthesise1
- Direction
- stimulatinge1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber cotyledons”
e1“Exogenous application of cytokinins was effective in stimulating chlorophyll biosynthesis”
Claim · model-written summary
meta-topolin was the most effective cytokinin for stimulating chlorophyll biosynthesis at low concentrations.
- Taxon
- cucumberCucumis sativust0
- Treatment
- mTe2
- Outcome
- chlorophyll biosynthesise2
- Direction
- most effectivee2
- Qualifier
- at low concentrationse2
- Comparator
- the other cytokininse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber cotyledons”
e2“mT was shown to be the most effective cytokinin in stimulating chlorophyll biosynthesis at low concentrations compared to the other cytokinins”
Claim · model-written summary
mT at 0.02-0.0002 mg/ml increased the amount of chlorophyll in cucumber cotyledons by more than threefold relative to control cotyledons.
- Taxon
- cucumberCucumis sativust0
- Treatment
- mT treatments at 0.02-0.0002 mg/mle3
- Outcome
- amount of chlorophylle3
- Direction
- increasede3
- Value
- more than threefolde3
- Comparator
- control cotyledonse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber cotyledons”
e3“mT treatments at 0.02-0.0002 mg/ml increased the amount of chlorophyll more than threefold compared with control cotyledons”
Claim · model-written summary
BA stimulated total chlorophyll content in cucumber cotyledons at 0.1-10 mg/ml.
- Taxon
- cucumberCucumis sativust0
- Treatment
- BAe4
- Outcome
- total chlorophyll contente4
- Direction
- stimulatede4
- Qualifier
- at 0.1-10 mg/ml concentrationse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber cotyledons”
e4“BA stimulated the total chlorophyll content at 0.1-10 mg/ml concentrations, but inhibited at lower (0.01, 0.001 mg/ml) concentrations”
Claim · model-written summary
BA inhibited total chlorophyll content in cucumber cotyledons at lower concentrations (0.01, 0.001 mg/ml).
- Taxon
- cucumberCucumis sativust0
- Treatment
- BAe4
- Outcome
- total chlorophyll contente4
- Direction
- inhibitede4
- Qualifier
- at lower (0.01, 0.001 mg/ml) concentrationse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber cotyledons”
e4“BA stimulated the total chlorophyll content at 0.1-10 mg/ml concentrations, but inhibited at lower (0.01, 0.001 mg/ml) concentrations”
Claim · model-written summary
K increased the chlorophyll amount in cucumber cotyledons at 1 mg/ml to twice that of control cotyledons.
- Taxon
- cucumberCucumis sativust0
- Treatment
- Ke5
- Outcome
- chlorophyll amounte5
- Direction
- increasede5
- Value
- twicee5
- Qualifier
- at 1 mg/ml concentratione5
- Comparator
- control cotyledonse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber cotyledons”
e5“K increased the chlorophyll amount at 1 mg/ml concentration to twice that of control cotyledons”
Claim · model-written summary
Z stimulated the chlorophyll level in cucumber cotyledons at almost all concentrations applied.
- Taxon
- cucumberCucumis sativust0
- Treatment
- Ze6
- Outcome
- chlorophyll levele6
- Direction
- stimulatede6
- Qualifier
- at almost all the concentrations appliede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber cotyledons”
e6“Z stimulated the chlorophyll level at almost all the concentrations applied”
Claim · model-written summary
A 0.02 mg/ml mT treatment doubled total protein content in cucumber cotyledons.
- Taxon
- cucumberCucumis sativust0
- Treatment
- 0.02 mg/ml-mTe7
- Outcome
- protein contente7
- Direction
- doublinge7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber cotyledons”
e7“A doubling of protein content in 0.02 mg/ml-mT-treated cotyledons was observed, whereas Z, BA, and K increased the total protein to a lesser extent”
Claim · model-written summary
Z increased total protein content in cucumber cotyledons to a lesser extent than mT.
- Taxon
- cucumberCucumis sativust0
- Treatment
- Ze7
- Outcome
- total proteine7
- Direction
- increasede7
- Qualifier
- to a lesser extente7
- Comparator
- mTe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber cotyledons”
e7“A doubling of protein content in 0.02 mg/ml-mT-treated cotyledons was observed, whereas Z, BA, and K increased the total protein to a lesser extent”
Claim · model-written summary
BA increased total protein content in cucumber cotyledons to a lesser extent than mT.
- Taxon
- cucumberCucumis sativust0
- Treatment
- BAe7
- Outcome
- total proteine7
- Direction
- increasede7
- Qualifier
- to a lesser extente7
- Comparator
- mTe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber cotyledons”
e7“A doubling of protein content in 0.02 mg/ml-mT-treated cotyledons was observed, whereas Z, BA, and K increased the total protein to a lesser extent”
Claim · model-written summary
K increased total protein content in cucumber cotyledons to a lesser extent than mT.
- Taxon
- cucumberCucumis sativust0
- Treatment
- Ke7
- Outcome
- total proteine7
- Direction
- increasede7
- Qualifier
- to a lesser extente7
- Comparator
- mTe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber cotyledons”
e7“A doubling of protein content in 0.02 mg/ml-mT-treated cotyledons was observed, whereas Z, BA, and K increased the total protein to a lesser extent”
Claim · model-written summary
BA had the greatest effect on peroxidase activity in cucumber cotyledons.
- Taxon
- cucumberCucumis sativust0
- Treatment
- BAe0
- Outcome
- peroxidase activitye0
- Direction
- greatest effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber cotyledons”
e0“BA was shown to have the greatest effect on peroxidase activity”
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