The Development and Evolution of Complex Leaves

0092599 Sinha高等植物的叶是主要的光合作用结构，负责全球范围内的能量交换，并负责植物的生存。 虽然两种类型的叶，简单的和复杂的，可以从任何给定的茎尖，这些不同的叶形态的发育和进化基础是未知的。高等植物的系统发育关系表明，复杂叶在陆生植物的进化过程中出现了多个独立的时期。 简单叶和复杂叶是否在一些基本级联过程的水平上有所不同，或者是新的基因和调控网络参与了叶复杂性的每一个独立事件？明确定义的基因，如KNOX1（KNOX1），LFY。PHAN在生成叶子时的复杂度需要定义。 此外，还需要鉴定调节该过程的未知基因座。 拟议的研究将利用基因表达分析在不相关的家庭与复杂的叶子，差异基因表达分析在克隆个体表现出对比的叶子形式，和克隆的因素，调节叶的复杂性在相关物种。 这项研究的目的是确定调节叶片形状和形态的基因，并帮助我们了解叶片的形态是如何发展的，以独特地适应叶片执行的光合功能。

0092599SinhaLeaves of higher plants are the primary photosynthetic structures and account for energy exchanges on a global scale and are responsible for plant survival. While two types of leaves, simple and complex, can arise from any given shoot apex, the developmental and evolutionary basis of these divergent leaf morphologies is not known. The phylogenetic relationships in higher plants suggest that complex leaves arose multiple independent times during the evolution of land plants. Do simple and complex leaves differ at the level of some basic cascade of processes or are new genes and regulatory networks involved in generating each independent event of leaf complexity? The role of well-defined genes like the KNOTTED-Like HOMEOBOX Class 1 genes (KNOX1), LFY. PHAN in the generation of leaf complexity needs to be defined. Further, as yet unknown loci that regulate the process also need to be identified. The proposed research will utilize gene expression analyses in unrelated families with complex leaves, differential gene expression analyses in clonal individuals exhibiting contrasting leaf forms, and the cloning of factors that regulate leaf complexity in related species. The goal of this research is to identify the genes that regulate leaf shape and form, and to help us understand how leaf form is developed to uniquely suit the photosynthetic function that leaves perform.