Regulation of Flower Maturation

花成熟的调节

• 批准号: 0744874
• 负责人: Jason Reed
• 金额: $ 45万
• 依托单位: University of North Carolina at Chapel Hill
• 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: 2008-04-01 至 2012-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0744874&HistoricalAwards=false
• 关键词: Regulation; Flower; Maturation

IOS-0744874, Regulation of flower maturation, PI Jason W. Reed, co-PI Punita NagpalFlowers are the reproductive structures of plants, and have both male and female parts that produce pollen and seeds. Male and female development in flowering plants must be coordinated in order for successful pollination and seed production to occur. This project is to study mechanisms of late flower development and pollination in the model plant Arabidopsis. Several regulators of gene expression are known that regulate flower opening and male and female reproductive competence. Two of these also regulate responses to the plant hormone auxin, suggesting that auxin may regulate flower maturation. The functions of hypothesized negative regulators of these proteins will be determined using genetic and molecular biology approaches. Downstream effectors of these transcription factors will be identified by analyzing global gene expression patterns. These studies will lead to a more comprehensive understanding of how late stages of flower development shortly before fertilization are regulated. It is likely that the mechanisms discovered will be applicable in other plants, and may therefore lead to greater understanding of mating systems in natural populations, and to practical applications such as in designing ways to reduce outcrossing of transgenic crops, or to optimize seed and fruit production. In addition, this work may also suggest the molecular basis for the closed florets of domesticated broccoli. In addition to this experimental part, the project will incorporate an educational component. A multimedia presentation on flower opening and pollination and how scientists study it will be designed, and presented to schoolchildren and the general public as part of the Science 360 program at the Morehead Planetarium and Science Center at the University of North Carolina at Chapel Hill. The Morehead Center hosts 130,000 annual visitors and summer camp participants.

IOS-0744874，花成熟的调节，Pi Jason W.Reed，co-Pi Punita Nagpal花是植物的生殖结构，有产生花粉和种子的雄性和雌性部分。开花植物的雄株和雌株的发育必须协调，才能成功授粉和种子生产。本课题旨在研究模式植物拟南芥的后期花发育和授粉机制。已知有几种基因表达调节因子，它们调节花朵开放和雄性和雌性生殖能力。其中两个还调节对植物激素生长素的反应，这表明生长素可能调节花的成熟。假想的这些蛋白质负调控因子的功能将使用遗传和分子生物学方法来确定。这些转录因子的下游效应因子将通过分析全球基因表达模式来确定。这些研究将有助于更全面地了解受精前不久花发育的后期是如何受到调控的。所发现的机制很可能适用于其他植物，因此可能有助于更好地了解自然种群中的交配系统，并有助于实际应用，如设计减少转基因作物异交的方法，或优化种子和果实生产。此外，这项工作还可能为驯化西兰花的闭合小花提供分子基础。除了这一实验部分，该项目还将纳入教育部分。将设计一个关于花朵开放和授粉以及科学家如何研究它的多媒体演示文稿，并作为科学360计划的一部分在北卡罗来纳大学教堂山分校的莫尔黑德天文馆和科学中心向小学生和普通公众展示。莫尔黑德中心每年接待13万名游客和夏令营参与者。