Circadian Regulation and Physiological Role of the CAT-3 Catalase in Maize Metabolism

CAT-3 过氧化氢酶在玉米代谢中的昼夜节律调节和生理作用

• 批准号: 9101238
• 负责人: John Scandalios
• 金额: $ 20.35万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-09-01 至 1996-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9101238&HistoricalAwards=false
• 关键词: Circadian; Regulation; Physiological; Role; CAT

Even though all aerobic organisms require molecular oxygen for survival, the release of activated oxygen species resulting both from normal metabolism and environmental pollution can cause serious damage to the cell. Enzymes such as the catalases, protect plants from damage and the resulting reduction metabolic efficiency. Since metabolic efficiency, particularly in leaves, is a primary determinant of plant productivity, these enzymes are of significant agrononic as well as scientific importance. The ultimate objective of this research is to understand the roles of the various catalases in both normal and stress-related metabolism. CAT3 is the most abundantly transcribed catalase gene in maize leaves, and the unusual timing of its expression implies an important, specific metabolic function early at night. The goal of this project is to clarify the metabolic role of this catalase, and identify DNA sequences responsible for its novel light regulation. Ultimately this research will allow the manipulation of agronomically important plants to increase their resistance to oxidative stress.

尽管所有需氧生物都需要分子氧来维持 生存，释放活性氧物质， 正常的新陈代谢和环境污染会导致 对细胞造成严重损害。 酶如过氧化氢酶， 植物免受损害和由此产生的代谢减少 效率 由于代谢效率，特别是在叶子中， 是植物生产力的主要决定因素，这些酶是 具有重要的农学和科学意义。 的 本研究的最终目的是了解 在正常和应激相关代谢中的各种过氧化氢酶。 CAT 3是玉米中转录量最高的过氧化氢酶基因 叶，其表达的不寻常的时间意味着 重要的、特殊的代谢功能。 目标 该项目的目的是阐明这种过氧化氢酶的代谢作用， 并确定负责其新光的DNA序列， 调控 最终这项研究将允许操纵 农业上重要的植物，以增加他们的抵抗力， 氧化应激