To study the adaptational characteristics of photosynthetic apparatus, especially photophosphory-lation in regulation of the dynamic connections between various partial reactions of photosynthesis during the changes in plant physiological state and its environment conditions.

Principal Investigator: Yun-Gang Shen (Yun-Kang Shen), Professor, Academician. Email: ygshen@sippe.ac.cn
Staff: Hai-Ying Zhao (emeritus)
Postdoctoral Fellow: Dr. Jian-Feng Cheng
Graduate Students: Fen-Hong Hu

Studies on the Regulation of Photosynthetic Apparatus, Especially Photophosphory-lation and its Application
Analyzing the mechanisms and applications of photosynthetic apparatus, especially photophosphorylation in photosynthesis. It utilizes the electropotential produced in the primay light reaction and proton gradient across the thylakoid membrane formed simultaneously with the photosynthetic electron transport to synthesize ATP, which affords energy for carbon assimilation and many other processes. Photophosphorylation is not only the important component of assimilatory power, but also the main regulatory factor in change the dynamics structure of thylakoid membrane and connection various protein complexes in it. It was demonstrated in our lab that ATP supply is often the limiting factor in photosynthesis. Our research showed that enhancing photophosphorylation could increase the photosynthesis for several days by improving the coupling efficiency of ATP synthase with various treatments or by stimulating cyclic photophosphorylation through spraying low concentration HSO3- solution. The latter measure was demonstratively applied and checked in rice production of Jiangxi province; and we consulted with "Hangzhou Zotec Chemical Industry Co., LTD" for the commercial production of HSO3- solution.

Major Publications:

1. 程建峰, 沈允钢. (2008) 循环光合磷酸化. 植物生理学通讯 44: 844-852.

2. 胡美君, 王义芹, 张亮, 王超, 沈允钢, 李振声, 李宏伟, 童依平, 李滨. (2007) 不同基因型小麦及其优选杂交后代的光合作用特性. 作物学报 33: 1879-1883.

3. 刘贤德, 马为民, 沈允钢. (2006) 植物光合机构的状态转换. 植物生理与分子生物学学报 32: 127-132.

4. Liu XD, Hu FH, Shen YG. (2006) Transient Decrease of Light-harvesting Complex II Phosphorylation Level by Hypoosmotic Shock in Dark-adapted Dunaliella salina. Acta Biochimica et Biophysica Sinica 38: 104-109.

5. Liu XD, Shen Y. (2006) Salt shock induces state I itransition of the photosynthetic apparatus in dark-adapted Dunaliella salina cells. Environmental and Experimental Botany 57: 19-24.

6. Liu XD, Shen Y. (2005) Salt-induced redox-independent phosphorylation of light harvesting chlorophyll a/b proteins in Dunaliella salina thylakoid membranes. Biochimica et Biophysica Acta 1706: 215-219.

7. Liu XD, Shen Y. (2004) Hypoosmotic shock induces a state I transition of photosynthetic apparatus in Dunaliella salina. Chinese Science Bulletin 49: 672-675.

8. Liu XD, Shen Y. (2004) NaCl-induced phosphorylation of light harvesting chlorophyll a/b proteins in thylakoid membranes from the halotolerant green alga, Dunaliella salina. FEBS Letters 569: 337-340.

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