Cysteine proteinases and programmed cell death in tomato

番茄中的半胱氨酸蛋白酶和程序性细胞死亡

• 批准号: 106265-2007
• 负责人: Greenwood, John
• 金额: $ 2.55万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=451404
• 关键词: Cysteine; proteinases; programmed; cell; death

The controlled suicide, or programmed death, of particular cells and tissues is a natural part of development in most multicellular organisms. In plants, the formation of the water conducting tissue, the "wood" in trees, is absolutely dependent on the programmed death of the cells that will be directly involved in water conduction. The process is also important in the formation of supportive tissues, the protective bark of trees, and in the response of plants to pathogen invasion. Senescence, the processes leading to leaf fall in autumn is also a consequence of programmed cell death. How the process is controlled in plants, however, is not fully understood. We are investigating the role of a group of particular enzymes involved in separate occurrences of programmed cell in various plants, using tomato as our model system. The various protein digesting enzymes have key roles in both early and late stages of the death process. Understanding of how the cells and the plant control where and when the enzymes appear and how they are activated should allow us to gain a more complete understanding of the entire program controlling the plant cell death process.

特定细胞和组织的受控自杀或程序性死亡是大多数多细胞生物体发育的自然部分。在植物中，水传导组织（树木中的“木材”）的形成绝对取决于直接参与水传导的细胞的程序性死亡。该过程对于支持组织、保护性树皮的形成以及植物对病原体入侵的反应也很重要。衰老，即导致秋季落叶的过程，也是程序性细胞死亡的结果。然而，工厂中如何控制该过程尚不完全清楚。我们正在研究一组特定酶的作用，这些酶参与各种植物中程序化细胞的单独发生，并使用番茄作为我们的模型系统。各种蛋白质消化酶在死亡过程的早期和晚期都发挥着关键作用。了解细胞和植物如何控制酶出现的地点和时间以及它们如何被激活应该使我们能够更全面地了解控制植物细胞死亡过程的整个程序。