2015年4月23日，中國科學院遺傳與發(fā)育生物學研究所研究員、博士生導師傅向東教授來訪我院，并為現(xiàn)代農(nóng)業(yè)系列講座進行了學術演講，同兩院師生代表進行深入交流。

    傅向東教授本次的演講主題為“Beyond the green revolution: new approaches for improving grain yield in rice”。本次演講中，傅向東教授闡釋了Nitrogen fertilization is essential to increase grain yield, whereas it also promotes stem and leaf elongation and makes crop plants more susceptible to lodging. It is well-known that Green Revolution is the introduction of semidwarfism into wheat and rice, which also improves the harvest index by the reduced plant height. However, the semidwarf (sd1) gene also causes the reduction of panicle branching and biomass in rice. Through genetic mapping, we identified a major QTL in rice , qDEP1, which encodes a plant specific G-protein γ-subunit and determines both panicle architecture and nitrogen growth responses. Different DEP1 alleles confer different nitrogen responses, and genetic diversity analysis suggests that DEP1 has been subjected to artificial selection during japonica rice domestication. Interestingly, dep1 plants are not only semidwarf but also have increased nitrogen-use efficiency. The DEP1 protein physically interacts with Gα (RGA1), and Gβ (RGB1) and reduced RGA1 or enhanced RGB1 activity represses nitrogen-mediated growth. Further, DEP1 could physically interact with transcriptional factors and regulate the expression of their down-stream genes.  Modulation of the G-protein signalling thus represents an important strategy to simultaneously improve nitrogen-use efficiency and grain yield over what is currently achievable.

演講結束后，現(xiàn)場聽眾圍繞演講主旨與傅向東教授進行了互動與討論。

     傅向東教授簡介：1991年獲武漢大學生物系學士學位，1994年獲中國科學院武漢植物所碩士學位，1996-1997年英國John Innes Centre訪問學者，1998-2001年John Innes Centre攻讀博士學位，2001年獲浙江大學和John Innes Centre聯(lián)合培養(yǎng)博士，2001-2005年在John Innes Centre做博士后。2005年入選中國科學院"百人計劃"，任植物細胞與染色體工程國家重點實驗室副主任。主要研究方向是植物激素調(diào)控植物形態(tài)建成的分子機理研究，在赤霉素信號轉導和水稻高產(chǎn)性狀形成的分子調(diào)控機制等研究方面做出了原創(chuàng)性工作，在《自然》和《自然?遺傳學》等國際重要刊物發(fā)表SCI論文30 余篇。2005年獲得“國家杰出青年科學基金”，2009年獲得國務院“政府特殊津貼”，2010年獲得“第十一屆中國青年科技獎”，2013年入選科技部“創(chuàng)新人才推進計劃中青年科技創(chuàng)新領軍人才”， 2014年獲全國優(yōu)秀科技工作者榮譽稱號。