Abstract
Effects of temperature (15/10, 25/20, 30/25, and 35/30 °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 °C), and the transcript level decreased at temperatures higher than 30 °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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Abbreviations
- ABA:
-
abscisic acid
- CHX:
-
cycloheximide
- GBSSI:
-
granule-bound starch synthase I
- SSS:
-
soluble starch synthase
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Wang, S.J., Liu, L.F., Chen, C.K. et al. Regulations of granule-bound starch synthase I gene expression in rice leaves by temperature and drought stress. Biol Plant 50, 537–541 (2006). https://doi.org/10.1007/s10535-006-0085-2
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DOI: https://doi.org/10.1007/s10535-006-0085-2