China Vitae

Biography

Zheng Guochang, male, Han nationality, is a native of Changshu, Jiangsu Province. He graduated from Central University in 1943 and received a doctorate from the University of Wisconsin in 1950.

Zheng Guochang's thesis about body cell chromosome meiosis illustrated how the body cell homologic chromosome separated at an earlier stage than originally thought, formed a double spindle at a later stage, and finally became a 4 haploid nucleus. This was one of the mechanisms concerning chromosome meiosis appearing within body cells in the world.

Zheng has researched cytomixis and was the first to confirm that the piercing wall movement of chromatin between pollen master cells was a spontaneous normal physiological phenomenon. He also discovered a close relationship between the movement of karyolymph and the piercing wall movement of contract albumen and chromatin.

Zheng recently published a thesis entitled "Cell Chemical Positioning of Fiber Enzyme Activeness at Very Early Stage I of Lily Pollen Master Cell Meiosis and its Relationship with Silks Among Hypo-Generated Cells," which resulted in answering the question it posed. Zheng had several achievements in embryogenesis of body cells, protoplast cultivation, cultivation of anther and germen without pollination, and filtering of a crop variety that could resist salt and hereditary transformation. In recent years, Zheng has cloned human alexin-1 cDNA and when the gene was transplanted into tobacco, a tobacco that could resist TMV was produced.

Zhang is an academician of the Chinese Academy of Sciences.