Journal
PLANT SIGNALING & BEHAVIOR
Volume 4, Issue 9, Pages 871-872Publisher
TAYLOR & FRANCIS INC
DOI: 10.4161/psb.4.9.9424
Keywords
barley; circadian rhythms; diurnal regulation; endosperm; oscillation; sbe; sorghum; starch
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Funding
- Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (Formas)
- Sida/SAREC under East Africa Regional Program and Research Network for Biotechnology, Biosafety and Biotechnology Policy Development program (BIO-EARN)
- U.S. Department of Energy [DE-AC02-05CH11231]
- Lawrence Berkeley National Laboratory
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Expression of the three SBE genes, encoding starch branching enzymes, in the sorghum endosperm exhibited a diurnal rhythm during a 24-h cycle. Remarkably, the oscillation in SBE expression was maintained in cultured spikes after a 48-h dark treatment, also when fed a continuous solution of sucrose or abscisic acid. Our findings suggest that the rhythmicity in SBE expression in the endosperm is independent of cues from the photosynthetic source and that the oscillator resides within the endosperm itself.
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