Abstract
Abstract De-etiolation of plant seedlings is controlled by a complex system of light and hormonal signaling. This process is accompanied by chloroplast development and initiation of chlorophyll biosynthesis leading to cotyledon greening. In this study, peculiaritis of regulation of expression of the key genes encoding enzymes of chlorophyll biosynthesis in wild type plants and mutants of perception and transduction of blue light in Arabidopsis thaliana (L.) Heynh. during cytokinin (CK)-dependent greening of seedlings were investigated. Inactivation of blue-light signaling components (СRY1, CRY2 and HY5) led to retarded chlorophyll accumulation and decrease of the expression of the key genes responsible for its biosynthesis. Exogenous application of cytokinin accelerated de-etiolation of wild type and knockout-mutants cry1cry2 and hy5 seedlings that was manifested itself in elevating chlorophyll a fluorescence and higher level of transcripts of a number of genes involved in chlorophyll biosynthesis. Taken together the results may provide evidence for the significant contribution of blue-light signaling to the greening regulation at early steps of de-etiolation of seedlings and involvement of HY5 protein in realization of the positive effect of CK at early steps of photomorphogenesis.
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Claims 7
Claim · model-written summary
Inactivation of blue-light signaling components retarded chlorophyll accumulation in Arabidopsis seedlings relative to wild type.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae0 - Treatment
- Inactivation of blue-light signaling componentse1
- Outcome
- chlorophyll accumulatione2
- Direction
- retardede2
- Comparator
- wild typee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in wild type plants and mutants of perception and transduction of blue light in Arabidopsis thaliana (L.) Heynh”
e1“Inactivation of blue-light signaling components”
e2“led to retarded chlorophyll accumulation and decrease of the expression of the key genes responsible for its biosynthesis”
Claim · model-written summary
Inactivation of blue-light signaling components decreased expression of chlorophyll biosynthesis genes relative to wild type.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Treatment
- Inactivation of blue-light signaling componentse1
- Outcome
- expression of the key genes responsible for its biosynthesise2
- Direction
- decreasee2
- Comparator
- wild typee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in wild type plants and mutants of perception and transduction of blue light in Arabidopsis thaliana (L.) Heynh”
e1“Inactivation of blue-light signaling components”
e2“led to retarded chlorophyll accumulation and decrease of the expression of the key genes responsible for its biosynthesis”
Claim · model-written summary
Exogenous cytokinin accelerated de-etiolation of wild type and cry1cry2 and hy5 knockout-mutant seedlings.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Material
- knockout-mutants cry1cry2 and hy5e3
- Treatment
- Exogenous application of cytokinine3
- Outcome
- de-etiolatione3
- Direction
- acceleratede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in wild type plants and mutants of perception and transduction of blue light in Arabidopsis thaliana (L.) Heynh”
e3“Exogenous application of cytokinin accelerated de-etiolation of wild type and knockout-mutants cry1cry2 and hy5 seedlings”
Claim · model-written summary
Exogenous cytokinin elevated chlorophyll a fluorescence in Arabidopsis seedlings.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Treatment
- Exogenous application of cytokinine3
- Outcome
- chlorophyll a fluorescencee4
- Direction
- elevatinge4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in wild type plants and mutants of perception and transduction of blue light in Arabidopsis thaliana (L.) Heynh”
e3“Exogenous application of cytokinin accelerated de-etiolation of wild type and knockout-mutants cry1cry2 and hy5 seedlings”
e4“that was manifested itself in elevating chlorophyll a fluorescence and higher level of transcripts of a number of genes involved in chlorophyll biosynthesis”
Claim · model-written summary
Exogenous cytokinin raised transcript levels of chlorophyll biosynthesis genes in Arabidopsis seedlings.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Treatment
- Exogenous application of cytokinine3
- Outcome
- level of transcripts of a number of genes involved in chlorophyll biosynthesise4
- Direction
- highere4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in wild type plants and mutants of perception and transduction of blue light in Arabidopsis thaliana (L.) Heynh”
e3“Exogenous application of cytokinin accelerated de-etiolation of wild type and knockout-mutants cry1cry2 and hy5 seedlings”
e4“that was manifested itself in elevating chlorophyll a fluorescence and higher level of transcripts of a number of genes involved in chlorophyll biosynthesis”
Claim · model-written summary
Blue-light signaling makes a significant contribution to greening regulation at early steps of de-etiolation.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Gene
- HY5e5
- Outcome
- greening regulation at early steps of de-etiolatione5
- Qualifier
- significant contribution of blue-light signalinge5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in wild type plants and mutants of perception and transduction of blue light in Arabidopsis thaliana (L.) Heynh”
e5“Taken together the results may provide evidence for the significant contribution of blue-light signaling to the greening regulation at early steps of de-etiolation of seedlings and involvement of HY5 protein in realization of the positive effect of CK at early steps of photomorphogenesis”
Claim · model-written summary
HY5 protein is involved in realizing the positive effect of cytokinin at early steps of photomorphogenesis.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Gene
- HY5 proteine5
- Outcome
- positive effect of CKe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in wild type plants and mutants of perception and transduction of blue light in Arabidopsis thaliana (L.) Heynh”
e5“Taken together the results may provide evidence for the significant contribution of blue-light signaling to the greening regulation at early steps of de-etiolation of seedlings and involvement of HY5 protein in realization of the positive effect of CK at early steps of photomorphogenesis”
The same questions in other papers
class · physiology: pigments · Arabidopsis thaliana (thale cress)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
class · molecular: expression · Arabidopsis thaliana (thale cress)Positive and negative results
22 papers in the same direction as this paper · 19 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- no effect
39 papers more in this group
See all 43 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.