Cellular and molecular mechanisms underlying single-cell C4 photosynthesis in Chenopodiaceae species

藜科物种单细胞 C4 光合作用的细胞和分子机制

• 批准号: 342747-2012
• 负责人: Chuong, Simon
• 金额: $ 1.97万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=527643
• 关键词: Cellular; molecular; mechanisms; underlying; single

Photosynthetic organisms perform photosynthesis, a process that converts carbon dioxide into carbohydrates that are used by all life forms. Land plants use C3, C4 or Crassulacean acid metabolic (CAM) photosynthetic pathway with C4 and CAM being more efficient under conditions where CO2 becomes limiting. For many years, it has been accepted that all C4 plants must have a feature called Kranz anatomy consisting of two functionally and structurally distinct photosynthetic cell types. This Kranz paradigm was challenged when three terrestrial plants were found to perform the C4 pathway within individual photosynthetic cells. These species perform C4 photosynthesis by partitioning of organelles and key enzymes in two separate compartments. These interesting species serve as ideal model systems to examine the regulatory factors regulating the development of complex structural and biochemical polarity in a single plant cell.

光合生物进行光合作用，这一过程将二氧化碳转化为所有生命形式所利用的碳水化合物。陆地植物使用 C3、C4 或景天酸代谢 (CAM) 光合作用途径，其中 C4 和 CAM 在 CO2 受到限制的条件下效率更高。多年来，人们普遍认为所有 C4 植物都必须具有一种称为 Kranz 解剖学的特征，由两种功能和结构不同的光合细胞类型组成。当三种陆生植物被发现在单个光合细胞内执行 C4 途径时，这种克兰兹范式受到了挑战。这些物种通过将细胞器和关键酶分配在两个独立的隔室中来进行 C4 光合作用。这些有趣的物种作为理想的模型系统来检查调节单个植物细胞中复杂结构和生化极性发展的调节因素。