Scientia Agricultura Sinica ›› 2007, Vol. 40 ›› Issue (11): 2468-2473 .

• TILLAGE & CULTIVATION·PHYSIOLOGY & ECOLOGY • Previous Articles     Next Articles

Tobacco plants transformed with Sweet Pepper positive GPAT Gene Alleviate Photoinhibition Under High Temperature

  

  1. 山东农业大学生命科学学院/作物生物学国家重点实验室 山东农业大学生命科学学院
  • Received:2006-11-27 Revised:2007-05-22 Online:2007-11-10 Published:2007-11-10

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Abstract: The saturated extent of MGDG, SQDG, DGDG and PG in thylakoid membrane of tobacco plants transformed with sweet pepper positive GPAT gene increased entirely, remarkably in MGDG with increasing by 16.2％. Under high temperature stress (48℃), ΦPSⅡ and Fv/Fm of wild type tobacco plants decreased by 42.3% and 21.3%, but only decreased by 24.2% and 13.7% in transgenic tobacco, which indicated that the transformed tobacco plants maintained higher actual photochemistry efficiency of PSII and lower photoinhibition under high temperature. The increase in saturated extent of thylakoid membrane lipids raised the temperature inducing phase separation and enhanced the stability of PSⅡunder high temperature.

Key words: Tobacco, Membrane lipids, High temperature

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