Journal
JOURNAL OF PLANT PHYSIOLOGY
Volume 166, Issue 4, Pages 428-434Publisher
ELSEVIER GMBH
DOI: 10.1016/j.jplph.2008.06.017
Keywords
Barley; Endosperm; Oscillation; SBE; Sorghum
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Funding
- Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (Formas)
- Sida/SAREC [BIO332 EARN]
- US Department of Energy [DE333 AC02-05CH11231]
- Lawrence Berkeley National Laboratory
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Spatial and temporal expression patterns of the sorghum SBEI, SBEIIA and SBEIIB genes, encoding, respectively, starch branching enzyme (SBE) I, IIA and IIB, in the developing endosperm of sorghum (Sorghum bicolor) were studied. Full-length genomic and cDNA clones for sorghum were cloned, and the SBEIIA cDNA was used together with gene-specific probes for sorghum SBEIIB and SBEI. In contrast to sorghum SBEIIB, which was expressed primarily in endosperm and embryo, SBEIIA was also expressed in vegetative tissues. All three genes shared a similar temporal expression profile during endosperm development, with a maximum activity at 15-24 d after pollination. This differed from barley and maize, in which SBEI gene activity showed a significantly later onset compared to that of SBEIIA and SBEIIB. Expression of the three SBE genes in the sorghum endosperm exhibited a diurnal. rhythm during a 24-h cycle. (C) 2008 Elsevier GmbH. All rights reserved.
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