Journal
BIOLOGIA PLANTARUM
Volume 50, Issue 4, Pages 537-541Publisher
ACAD SCIENCES CZECH REPUBLIC, INST EXPERIMENTAL BOTANY
DOI: 10.1007/s10535-006-0085-2
Keywords
abscisic acid; Oryza sativa
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Effects of temperature (15/10, 25/20, 30/25, and 35/30 degrees C) and drought stresses on the expression of granule-bound starch synthase I (GBSSI) gene were examined in rice (Oryza sativa L.) seedlings. The GBSSI expression was higher at the low temperature (15/10 degrees C), and the transcript level decreased at temperatures higher than 30 degrees C. Protein phosphorylation was involved in the low temperature-stimulated signal transduction of GBSSI regulation. The expression of GBSSI in rice seedling was reduced under a drought stress. Even though exogenous ABA played a role to reduce the GBSSI transcript accumulation under non-stress condition, the reducing of GBSSI expression by drought stress appeared to be mediated by an ABA-independent pathway.
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