Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 305-806, Korea.
Plant Cell Rep. 2012 Feb;31(2):417-26. doi: 10.1007/s00299-011-1176-x. Epub 2011 Oct 30.
The role that the putative thylakoid lumenal cyclophilin (CYP) CYP20-2 locates in the thylakoid, and whether CYP20-2 is an essential gene, have not yet been elucidated. Here, we show that CYP20-2 is well conserved in several photosynthetic plants and that the transcript level of the rice OsCYP20-2 gene is highly regulated under abiotic stress. We found that ectopic expression of rice OsCYP20-2 in both tobacco and Arabidopsis confers enhanced tolerance to osmotic stress and extremely high light. Based on these results, we suggest that although the exact biochemical function of OsCYP20-2 in the thylakoid lumen (TL) remains unclear, it may be involved in photosynthetic acclimation to help plants cope with environmental stress; the OsCYP20-2 gene may be a candidate for enhancing multiple abiotic stress tolerance.
拟叶绿体内腔环胞素（CYP）CYP20-2 的作用位置及其是否为必需基因尚未阐明。本文显示 CYP20-2 在几种光合植物中高度保守，并且水稻 OsCYP20-2 基因的转录水平在非生物胁迫下受到高度调控。我们发现，在烟草和拟南芥中异位表达水稻 OsCYP20-2 可赋予其对渗透胁迫和极高光的增强耐受性。基于这些结果，我们认为，尽管 OsCYP20-2 在类囊体腔（TL）中的确切生化功能尚不清楚，但它可能参与光合作用的适应，以帮助植物应对环境胁迫；OsCYP20-2 基因可能是增强多种非生物胁迫耐受性的候选基因。
