Abstract
The diverse plasticity of plant architecture is largely determined by shoot branching. Shoot branching is an event regulated by multiple environmental, developmental and hormonal stimuli through triggering lateral bud response. After perceiving these signals, the lateral buds will respond and make a decision on whether to grow out. TCP transcriptional factors, BRC1/TB1/FC1, were previously proven to be involved in local inhibition of shoot branching in Arabidopsis, pea, tomato, maize and rice. To investigate the function of BRC1, we isolated the BRC1 homolog from chrysanthemum. There were two transcripts of DgBRC1 coming from two alleles in one locus, both of which complemented the multiple branches phenotype of Arabidopsis brc1-1, indicating that both are functionally conserved. DgBRC1 was mainly expressed in dormant axillary buds, and down-regulated at the bud activation stage, and up-regulated by higher planting densities. DgBRC1 transcripts could respond to apical auxin supply and polar auxin transport. Moreover, we found that the acropetal cytokinin stream promoted branch outgrowth whether or not apical auxin was present. Basipetal cytokinin promoted outgrowth of branches in the absence of apical auxin, while strengthening the inhibitory effects on lower buds in the presence of apical auxin. The influence of auxin and strigolactons (SLs) on the production of cytokinin was investigated, we found that auxin locally down-regulated biosynthesis of cytokinin in nodes, SLs also down-regulated the biosynthesis of cytokinin, the interactions among these phytohormones need further investigation.
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Claims 11
Claim · model-written summary
Two DgBRC1 transcripts came from two alleles at one locus.
- Taxon
- Chrysanthemum
.jpeg?width=60)
Chrysanthemumt0 - Gene
- DgBRC1e0
- Outcome
- two transcriptse0
- Value
- twoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpeg?width=500)
Verbatim
e0“There were two transcripts of DgBRC1 coming from two alleles in one locus”
t0“Chrysanthemum”
Claim · model-written summary
Both DgBRC1 alleles complemented the Arabidopsis brc1-1 multiple-branch phenotype.
- Taxon
- ChrysanthemumChrysanthemumt0
- Treatment
- both of whiche0
- Gene
- DgBRC1t0
- Outcome
- multiple branches phenotype of Arabidopsis brc1-1e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both of which complemented the multiple branches phenotype of Arabidopsis brc1-1”
t0“Roles of DgBRC1 in Regulation of Lateral Branching in Chrysanthemum”
Claim · model-written summary
DgBRC1 was mainly expressed in dormant axillary buds.
- Taxon
- ChrysanthemumChrysanthemumt0
- Organ / stage
- dormant axillary budse0
- Gene
- DgBRC1e0
- Outcome
- mainly expressede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DgBRC1 was mainly expressed in dormant axillary buds”
t0“Chrysanthemum”
Claim · model-written summary
DgBRC1 expression decreased at bud activation.
- Taxon
- ChrysanthemumChrysanthemumt0
- Organ / stage
- bud activation stagee0
- Gene
- DgBRC1e0
- Outcome
- DgBRC1e0
- Direction
- down-regulatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DgBRC1 was mainly expressed in dormant axillary buds, and down-regulated at the bud activation stage”
t0“Chrysanthemum”
Claim · model-written summary
Higher planting density upregulated DgBRC1.
- Taxon
- ChrysanthemumChrysanthemumt0
- Treatment
- higher planting densitiese0
- Gene
- DgBRC1e1
- Outcome
- DgBRC1e1
- Direction
- up-regulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“up-regulated by higher planting densities”
e1“DgBRC1 was mainly expressed”
t0“Chrysanthemum”
Claim · model-written summary
DgBRC1 transcripts responded to apical auxin supply and polar auxin transport.
- Taxon
- ChrysanthemumChrysanthemumt0
- Treatment
- apical auxin supply and polar auxin transporte0
- Gene
- DgBRC1e0
- Outcome
- DgBRC1 transcriptse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DgBRC1 transcripts could respond to apical auxin supply and polar auxin transport”
t0“Chrysanthemum”
Claim · model-written summary
Acropetal cytokinin promoted branch outgrowth regardless of apical auxin.
- Taxon
- ChrysanthemumChrysanthemumt0
- Treatment
- acropetal cytokinin streame0
- Outcome
- branch outgrowthe0
- Direction
- promotede0
- Qualifier
- whether or not apical auxin was presente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the acropetal cytokinin stream promoted branch outgrowth whether or not apical auxin was present”
t0“Chrysanthemum”
Claim · model-written summary
Basipetal cytokinin promoted branch outgrowth without apical auxin.
- Taxon
- ChrysanthemumChrysanthemumt0
- Treatment
- Basipetal cytokinine0
- Outcome
- outgrowth of branchese0
- Direction
- promotede0
- Qualifier
- absence of apical auxine0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Basipetal cytokinin promoted outgrowth of branches in the absence of apical auxin”
t0“Chrysanthemum”
Claim · model-written summary
Basipetal cytokinin strengthened inhibition of lower buds with apical auxin.
- Taxon
- ChrysanthemumChrysanthemumt0
- Treatment
- Basipetal cytokinine1
- Outcome
- inhibitory effects on lower budse0
- Direction
- strengtheninge0
- Qualifier
- presence of apical auxine0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strengthening the inhibitory effects on lower buds in the presence of apical auxin”
e1“Basipetal cytokinin”
t0“Chrysanthemum”
Claim · model-written summary
Auxin locally downregulated cytokinin biosynthesis in nodes.
- Taxon
- ChrysanthemumChrysanthemumt0
- Organ / stage
- nodese0
- Treatment
- auxine0
- Outcome
- biosynthesis of cytokinine0
- Direction
- down-regulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“auxin locally down-regulated biosynthesis of cytokinin in nodes”
t0“Chrysanthemum”
Claim · model-written summary
Strigolactons downregulated cytokinin biosynthesis.
- Taxon
- ChrysanthemumChrysanthemumt0
- Treatment
- SLse0
- Outcome
- biosynthesis of cytokinine0
- Direction
- down-regulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SLs also down-regulated the biosynthesis of cytokinin”
e1“strigolactons (SLs)”
t0“Chrysanthemum”
The same questions in other papers
class · growth · ChrysanthemumPositive and negative results
8 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- negative
- negative
8 papers more in this group
See all 12 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.