Acknowledgments

I want to thank my supervisor, Prof. Peter Hegemann. It is because of you that I got to know this tiny but very interesting little creature ---- Chlamydomonas. It is under your supervision, I understand more about science research. With your help, I improved myself in many fields. Thank you so much!

I want to thank DFG and SFB for providing the financial support for this work.

I want to thank Alke, Christoph, Markus Heitzer, and Boris for spending time reading this thesis and giving me valuable suggestions. Thank you!

I want to thank Nic and Nils, although you guys may not read this thesis. I am always grateful to you. You are my friends, also my teachers. Thank you!

Thank you, Irina! Thank you for the help and suggestions you gave me! The discussions with you are really helpful to me.

Thank you, Berti! In my four years staying in Regensburg, you gave me a lot of help. Thank you very much!

I also want to thank my other lab members and colleagues: Markus, Tina, Sabine, Norbert, Suneel, Gerhard, Stanimir, Marion. Thank you for the help you gave me. I will always remember that!

I want to thank my parents! 爸爸,妈妈, 谢谢你们给我的鼓励和支持. 在我最彷徨无助的时候, 你们帮助我一

步一步建立自信, 勇敢的面对未来. 我会努力下去, 让你们为我骄傲!

Finally, I want to thank my wife. The four years is the most difficult period of time for us. Thank you for the encouragement, support and love you gave me! We will work together to make our future!