The Genetic Basis of Sex Determination in The Homosporous Fern Ceratopteris Richardii

同孢蕨类植物角蕨性别决定的遗传基础

• 批准号: 9405780
• 负责人: Jo Ann Banks
• 金额: $ 35.15万
• 依托单位: Purdue Research Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-01 至 1997-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9405780&HistoricalAwards=false
• 关键词: Genetic; Basis; Sex; Determination; Homosporous

9405780 Banks The primary objective of this proposal is to use a genetic approach to understand how antheridiogen and abscisic acid govern the sex of the gametophyte of Ceratopteris. At least some key regulatory genes involved in sex determination have been identified by generating and characterizing mutations that alter the normal sexual phenotype. A hypothetical model of how these genes interact in a regulatory hierarchy has been proposed. One objective of the proposed research is to continue with the genetic, morphological genes and physiological analysis of these mutants in order to understand the wild type functions of these genes and to further test and modify the proposed model of gene interaction. %%% Gametophytes of the fern Ceratopteris richardii are either hermaphroditic or male. The primary sex-determining signal in this and many other ferns is antheridiogen a gibberellin-like pheromone that is secreted by the hermaphroditic gametophyte and promotes male development of other sexually undetermined juvenile gametophytes. The plant hormone abscisic acid blocks the antheridiogen response. How sex is determined in plants is an important developmental question whose answer many ultimately have practical applications in agriculture and plant breeding. The proposed studies will provide a basic understanding of the genes involved in sex determination, and will also be of value in understanding how plant cells are coordinated to maintain a single sexual developmental fate, and how the sexual developmental fate of cells within an organism can change to adapt to changes in the environment. ***

9405780该提案的主要目的是使用遗传学方法来了解药毒原生原和脱落酸如何控制ceratopteris的配子体性的性别。 通过产生和表征改变正常性表型的突变，至少已经确定了与性别确定有关的一些关键调节基因。 已经提出了这些基因在调节层次结构中如何相互作用的假设模型。 拟议的研究的一个目的是继续对这些突变体的遗传，形态学基因和生理分析，以了解这些基因的野生型功能，并进一步测试和修改所提出的基因相互作用模型。 蕨类植物的ceratopteris richardii的配子体是雌雄同体或男性。 在此和许多其他蕨类植物中，主要的性别确定信号是类似甘贝雷素的信息素，由雌雄同体的配子植物分泌，并促进了其他性不确定的少年配子体的男性发展。 植物激素脱甲酸阻止了药力基因原子的反应。 在植物中如何确定性别是一个重要的发展问题，其答案许多人最终在农业和植物育种方面具有实际应用。 拟议的研究将提供对性确定基因的基本理解，并且对于了解植物细胞如何协调以维持单一的性发育命运以及生物体内细胞的性发育命运如何变化以适应环境变化，这也将具有价值。 ***