报告主题：Diversification of the flower and its underlying developmental and molecular mechanisms

主 讲 人：孔宏智 研究员（中国科学院植物研究所）

主 持 人：李 猛 教授

时 间：2025年12月1日（一）16：00

地 点：深圳大学致知楼706

嘉宾简介：

孔宏智，中国科学院植物研究所二级研究员、博士生导师，国家杰出青年科学基金获得者，国家高层次人才特殊支持计划科技创新领军人才和“国家百千万人才工程”入选者，基金委创新研究群体项目主持人，中国科学院特聘核心岗位人才，中国植物学会执行秘书长、常务理事、系统与进化植物学专业委员会主任，Journal of Systematics and Evolution共同主编，《生物多样性》副主编，New Phytologist和Journal of Integrative Plant Biology编委，第十四届全国政协委员，北京市第十五、十六届人大代表。1995年于西北大学毕业并获得理学学士学位，2000年在中国科学院植物研究所获得博士学位并留所工作，2002至2004年在美国宾夕法尼亚州立大学作访问学者，曾任中国科学院植物研究所系统与进化植物学国家重点实验室主任。主要从事植物系统学和进化发育生物学研究，在“重复基因的分化”、“花发育调控网络的进化”、“花的起源与多样化”和“复杂花瓣的发育与进化”等研究中取得了重要进展，以第一或通讯作者在Nature Plants、Nature Communications、Science Advances、PNAS和Plant Cell等刊物发表论文50余篇，参与Nature和Science等刊物论文50余篇，曾获“中国科学院青年科学家奖”、“中国青年科技奖”、“吴征镒植物学奖青年创新奖”等奖项和“全国优秀科技工作者”、“有突出贡献中青年专家”等荣誉称号，享受国务院政府特殊津贴。

报告摘要：

Flowers show tremendous diversity in various aspects, yet the mechanisms underlying the diversification of the flower remain largely unclear. By conducting extensive evolutionary developmental biological (Evo-Devo) studies on representative flowering plants, we found that: 1) diversification of the flower were mainly caused by evolutionary modification of four key developmental programs (i.e., the initiation, identity determination, morphogenesis and maturation of floral organs); 2) flexibility in the basic structure of spiral flowers were caused by variation in the size of floral meristem, asynchronous initiation of floral organs, and plasticity of the floral organ identity determination program; 3) duplication, diversification and co-option of floral symmetry genes and organ identity genes have been the key for the origin of the nearly zygomorphic, spiral Delphinieae flowers; 4) the main reason for the evolution of elaborate Nigella petals was the origination of new characters one after another, and the main ways of petal elaboration are marginal elaboration, ventral elaboration, dorsal elaboration and surface elaboration; 5) at least 30 key genes regulate the morphogenesis of the elaborate N. damascena petals, with YAB5 and LMI1 playing key roles in the formation of pseudonectaries and short trichomes, respectively; 6) peltation of the Nigella and other Ranunculaceous petals was caused by ectopic expansion of abaxial gene expression into the basal part of adaxial side; and 7) synergistic regulation of biosynthesis pathways of chlorophylls, carotenoids and anthocyanins, combined with duplication and functional divergence of an R2R3-MYB gene, may have caused the formation and diversification of complex color patterns in Nigella.