Biologia Plantarum

, Volume 50, Issue 4, pp 537–541 | Cite as

Regulations of granule-bound starch synthase I gene expression in rice leaves by temperature and drought stress

  • S. J. Wang
  • L. F. Liu
  • C. K. Chen
  • L. W. Chen
Original Paper


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.

Additional key words

abscisic acid Oryza sativa 



abscisic acid




granule-bound starch synthase I


soluble starch synthase


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Copyright information

© Institute of Experimental Botany, ASCR, Praha 2006

Authors and Affiliations

  • S. J. Wang
    • 1
  • L. F. Liu
    • 1
  • C. K. Chen
    • 1
  • L. W. Chen
    • 1
  1. 1.Department of AgronomyNational Taiwan UniversityTaipeiTaiwan

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