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| Hauptseite > Publikationsdatenbank > Spatio-temporal leaf growth patterns of Arabidopsis thaliana and evidence for sugar control of the diel leaf growth cycle |
| Hauptseite > Publikationsdatenbank > Spatio-temporal leaf growth patterns of Arabidopsis thaliana and evidence for sugar control of the diel leaf growth cycle |
| Journal Article | PreJuSER-56255 |
; ; ; ;
2007
Wiley-Blackwell
Oxford [u.a.]
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Please use a persistent id in citations: doi:10.1111/j.1469-8137.2007.02053.x
Abstract: Leaf growth dynamics are driven by diel rhythms. The analysis of spatio-temporal leaf growth patterns in Arabidopsis thaliana wild type and mutants of interest is a promising approach to elucidate molecular mechanisms controlling growth. The diel availability of carbohydrates is thought to affect diel growth. A digital image sequence processing (DISP)-based noninvasive technique for visualizing and quantifying highly resolved spatio-temporal leaf growth was adapted for the model plant A. thaliana. Diel growth patterns were analysed for the wild type and for a mutant with altered diel carbohydrate metabolism. A. thaliana leaves showed highest relative growth rates (RGRs) at dawn and lowest RGRs at the beginning of the night. Along the lamina, a clear basipetal gradient of growth rate distribution was found, similar to that in many other dicotyledonous species. The starch-free 1 (stf1) mutant revealed changed temporal growth patterns with reduced nocturnal, and increased afternoon, growth activity. The established DISP technique is presented as a valuable tool to detect altered temporal growth patterns in A. thaliana mutants. Endogenous changes in the diel carbohydrate availability of the starch-free mutant clearly affected its diel growth rhythms.
Keyword(s): Arabidopsis: growth & development (MeSH) ; Carbohydrates: physiology (MeSH) ; Kinetics (MeSH) ; Light (MeSH) ; Monosaccharides: metabolism (MeSH) ; Periodicity (MeSH) ; Photosynthesis (MeSH) ; Plant Leaves: growth & development (MeSH) ; Carbohydrates ; Monosaccharides ; J ; Arabidopsis thaliana (auto) ; diel (auto) ; digital image sequence processing (DISP) (auto) ; leaf growth (auto) ; starch (auto) ; sugar (auto) ; sugar sensing (auto)
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