DISSERTATION RESEARCH: Evolution of floral symmetry in the petaloid monocot order Zingiberales

论文研究：花瓣状单子叶植物姜目花对称性的进化

• 批准号: 0808298
• 负责人: Chelsea Specht
• 金额: $ 1.2万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-07-15 至 2011-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0808298&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Evolution; floral; symmetry

An award has been made to the University of California at Berkeley under the direction of Dr. Chelsea D. Specht to study the role several genes affecting flowering and floral symmetry in a family of plants that includes gingers, bananas, and the bird of paradise plant. The grant will improve the doctoral dissertation research of Madelaine Bartlett. Flowering plants are astoundingly diverse, and changes in floral symmetry are thought to have been one driving force in the evolution of this diversity. The goal of the proposed research is to investigate the role of two candidate gene families, the CYC-like genes and the B and C class MADS box genes, in the initiation and elaboration of floral symmetry in the monocotyledonous order Zingiberales, which contains about 2,000 species. Multiple changes in floral symmetry have occurred in the Zingiberales, making it an ideal order in which to study the evolution of this important ecological trait. It is hypothesized that there will be shifts in gene sequence, number and expression accompanying shifts in symmetry across the order. Modern phylogenetic methods will be used to investigate the evolutionary history of these gene families. Their expression patterns in developing flowers with differing symmetries will be assessed using in situ hybridization and RT-PCR.Understanding the genetics of how flowering plant diversity evolved is critically important in deciding how to protect and maintain such diversity now and in the future. This study is one of the first to expand our knowledge of floral development to the petaloid monocots, and the first to expand this research to tropical monocots. Through the continuation of this research project, at least two additional undergraduate students will be trained in molecular lab work and the scientific process. This research will also result in the dissemination of knowledge through publications, presentations at scientific meetings, and a website with procedures and protocols for extending molecular genetic research to non-model systems.

在Chelsea D博士的指导下，加州大学伯克利分校获得了一个奖项。Specht研究影响植物家族（包括生姜、香蕉和天堂鸟）开花和花对称性的几个基因的作用。 这笔赠款将改善Madelaine Bartlett的博士论文研究。 开花植物的多样性令人惊讶，花对称性的变化被认为是这种多样性进化的驱动力之一。该研究的目的是探讨两个候选基因家族，CYC-样基因和B和C类MADS盒基因，在单子叶植物中的花对称性的启动和阐述中的作用。 花对称性的多个变化发生在该属植物中，使其成为研究这一重要生态特征进化的理想顺序。据推测，将有转移基因序列，数量和表达伴随着转移对称性的顺序。现代系统发育学方法将被用来研究这些基因家族的进化历史。它们在不同对称性的花发育中的表达模式将使用原位杂交和RT-PCR.Understanding开花植物多样性如何进化的遗传学进行评估，在决定如何保护和维持这种多样性现在和将来是至关重要的。这项研究是第一个将我们的花发育知识扩展到瓣状单子叶植物的研究之一，也是第一个将这项研究扩展到热带单子叶植物的研究。通过这个研究项目的继续，至少有两个额外的本科生将在分子实验室工作和科学过程的培训。这项研究还将通过出版物、在科学会议上的介绍以及一个载有将分子遗传学研究扩展到非模型系统的程序和协议的网站来传播知识。