Physiological and Genetic Characterization of Salt Tolerant Mutants in Ceratopteris

角蕨耐盐突变体的生理和遗传特征

• 批准号: 8803620
• 负责人: Leslie Hickok
• 金额: $ 18.19万
• 依托单位: University of Tennessee Knoxville
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-07-01 至 1992-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8803620&HistoricalAwards=false
• 关键词: Physiological; Genetic; Characterization; Salt; Tolerant

This project uses the fern Ceratopteris as an experimental plant system that provides several advantages for such studies, including: a variety of confirmed mutants derived from the same salt sensitive wild type genotype, the ability to rapidly characterize the genetic basis of the various mutants, the ability to precisely determine quantitative responses to stress, and the ability to efficiently carry out physiological and genetic studies on both a simple haploid gametophyte and a developmentally complex vascular sporophyte phase of the life cycle. Initial studies show that while the effects of single genes on tolerance may be modest, specific combinations exhibit synergistic effects, resulting in high levels of tolerance. The physiological and genetic complexity associated with natural salt tolerance is most likely based upon similar gene interactions. The availability of the described mutants and the advantages of this plant system provide a unique opportunity to study fundamental aspects of salt tolerance in plants. %%% The development of crops with enhanced tolerance to salt and other osmotic stresses is an important objective in dealing with the worldwide problem of excess salinity on agricultural land. However, the complex basis of salt tolerance is incompletely understood. Fundamental genetic and physiological studies are needed.

这个项目使用蕨类植物水蕨作为 一种实验性植物系统，具有以下优点 用于此类研究，包括：各种已确认的突变体 来自相同的盐敏感野生型基因型， 能够快速表征的遗传基础， 各种突变体，精确确定 对压力的定量反应，以及 有效地进行生理和遗传研究， 一个简单的单倍体配子体和一个发育中的 复杂的维管孢子体阶段的生活史。 初始 研究表明，虽然单个基因对 耐受性可能是适度的，特定组合表现出 协同效应，导致高水平的耐受性。 与之相关的生理和遗传复杂性 天然的耐盐性很可能是基于类似的基因 交互. 所述突变体的可用性和 该工厂系统的优点提供了独特的 有机会研究耐盐性的基本方面， 植物 %%% 开发耐盐性增强的作物， 其他渗透应力是处理中的重要目标 由于全球范围内的农业盐碱化问题， 土地 然而，耐盐性的复杂基础是 不完全理解。 基础遗传学和 需要进行生理学研究。