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Yazdanbakhsh, N.,Sulpice, R.,Graf, A.,Stitt, M.,Fisahn, J.
2011
February
Circadian control of root elongation and C partitioning in Arabidopsis thaliana
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34
We have investigated how growth is buffered against changes in the carbon supply during the diurnal light / dark cycle. Time-resolved video imaging revealed that primary roots of wild-type Arabidopsis seedlings show marked diurnal oscillations in their growth rate. The underlying mechanisms were investigated by comparing the rate of growth and the diurnal responses in different photoperiods, in the presence and absence of exogenous sugars, in starch mutants and in clock mutants. While the overall growth rate depends on the carbon supply, the clock orchestrates starch turnover and growth to avoid exhaustion of carbon reserves during the night.We have investigated how growth is buffered against changes in the carbon supply during the diurnal light / dark cycle. Time-resolved video imaging revealed that primary roots of wild-type Arabidopsis seedlings show marked diurnal oscillations in their growth rate. The underlying mechanisms were investigated by comparing the rate of growth and the diurnal responses in different photoperiods, in the presence and absence of exogenous sugars, in starch mutants and in clock mutants. While the overall growth rate depends on the carbon supply, the clock orchestrates starch turnover and growth to avoid exhaustion of carbon reserves during the night.
1365-3040 (Electronic) 01
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=21332506 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=21332506
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