Pattern Formation in Plants: Biophysics and Gene Expression

9317755绿色 在植物花和营养枝的正常发育过程中，基因表达和形态变化具有高度协调的模式。 绿色博士将研究这两个过程及其相互作用模式。 表达梯度被假定为建立导致组织自发复杂折叠的物理扩张梯度。 这是对周期性和模式性起源的一种新的提出。 形态学变化被假定为通过牵张受体或细胞骨架反应对表达起作用。 这完成了形态发生的生殖循环。 向日葵头上的器官模式出现在一个圆形生殖区后面的严格的发育顺序中，该生殖区从边缘移动到未分化细胞的中心区域。 主要目的是确定表达事件和折叠事件在这个分生组织中的相对序列。 通过非破坏性SEM复制方法详细跟踪图案和组织折叠。 通过原位杂交研究表达。 类似的分析提出了其他系统，包括形态突变体。 绿色博士将研究非侵入性物理扰动带来的变化。 表达和形态反应的周期性相互作用的本质应该变得清楚。 ***

9317755 Green In the normal development of flowers and vegetative shoots of plants, there is a highly coordinated pattern of gene expression and morphological change. Dr. Green will study both processes and their mode of interaction. Expression gradients are postulated to set up physical expansion gradients which lead to the spontaneous complex folding of tissue. This is a new proposal for the origin of periodicity and pattern. The morphological change is postulated to act back on expression via stretch receptors or cytoskeletal responses. This completes a generative cycle for morphogenesis. Organ pattern on the sunflower head emerges in strict developmental sequence behind a circular generative zone which moves from the rim into a central field of undifferentiated cells. The major aim is to determine the relative sequence of expression events and of folding events in this meristem. Pattern and tissue folding are to be followed in detail by a non-destructive SEM replica method. Expression is to be studied by in situ hybridization. Similar analysis is proposed for other systems, including morphological mutants. Dr. Green will study changes brought on by non-invasive physical perturbation. The nature of the cyclic interaction of expression and morphological response should become clear. ***