报告题目：Increasing root branching plasticity: lessons from evolution
报告人：Tom Beeckman 教授 (比利时根特大学VIB研究所)
Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium.
IB-UGent Center for Plant Systems Biology, Technologiepark 927, 9052 Gent, Belgium.
报告时间：2018年9月17日下午3:00 – 4:30
Root architecture is a trait that strongly contributes to the performance of plants. The way plant root systems colonize the soil will be determinative for the all or not thriving growth of the above ground parts. Because plants are sessile organisms, the exploration of soil in search of water and nutrients is mainly dependent on steering and controlling cell division and elongation. Early land plants survived on land without roots and the soil has been gradually conquered through a stepwise optimization of their below ground parts. Modern plants have established a strategy of lateral branching and show an educated level of plasticity allowing them to respond to changing edaphic conditions by adjusting cell division and elongation. The secret behind the plasticity can be found in the presence of an endogenous tissue layer in which, on a regular basis, stem cells with high cell division competence are deposited representing a powerful instrument through which plants can easily generate new lateral root branches. These branches are not arbitrarily formed along a root axis, but their spacing is rather determined by an endogenous patterning mechanism that guarantees an even distribution of lateral organs over the entire length of the root. New insights in this patterning mechanism will be discussed and by going back in time through the study of an extant relative of the early land plants a hypothesis will be put forward how the lateral branching strategy arose through evolution.
Tom Beeckman教授是比利时根特大学 (Ghent University) 终身教授，同时也是VIB研究所植物系统生物学中心 (Center for Plant Systems Biology, VIB) 独立课题组组长。Tom Beeckman教授的课题组长期以模式植物拟南芥和玉米为研究材料从事植物根系发育，尤其是侧根发生的相关分子机制的研究，在生长素，细胞不对称分裂，细胞周期在根系发育过程中的作用及分子机制等方向上做出了诸多的经典研究，近十年来已在Science、Nature、PNAS、Current Biology等杂志上以通讯作者发表了大量高水平研究论文。近年来他所领导的课题组建立了化合物筛选平台，并进一步结合经典的正反向遗传学手段，系统阐释了根系发生的分子机理和根系发育模式。