REdefining metabolic Schemes and Pathways In plant leaf REspiration

重新定义植物叶片呼吸作用的代谢方案和途径

• 批准号: FT140100645
• 负责人: Prof Dr Guillaume Tcherkez
• 金额: $ 59.7万
• 依托单位: The Australian National University
• 依托单位国家: 澳大利亚
• 项目类别: ARC Future Fellowships
• 财政年份: 2015
• 资助国家: 澳大利亚
• 起止时间: 2015-01-15 至 2019-01-14
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/FT140100645
• 关键词: REdefining; metabolic; Schemes; Pathways; plant

Leaf respiration-related metabolism in terrestrial vegetation liberates considerable amounts of carbon dioxide, ammonia and hydrogen sulphide into the atmosphere. Such gaseous losses are detrimental to biomass production but respiration also sustains nutrient assimilation and biosyntheses. This project aims to describe flux patterns in respiratory metabolism and disentangle interactions with other pathways such as photorespiration and nitrogen assimilation. It will exploit stable isotopes to quantify metabolic partitioning and show coordination between major processes. It will establish key mechanisms by which respiration dictates plant carbon balance and contributes to identifying metabolic bottle-necks in plant primary production.

陆地植被中与叶呼吸有关的新陈代谢释放出相当数量的二氧化碳、氨和硫化氢到大气中。这种气体损失不利于生物量的生产，但呼吸作用也支持养分的同化和生物合成。该项目旨在描述呼吸代谢中的通量模式，并解开与其他途径的相互作用，如光呼吸和氮同化。它将利用稳定的同位素来量化代谢分配，并显示主要过程之间的协调。它将建立呼吸作用决定植物碳平衡的关键机制，并有助于识别植物初级生产中的代谢瓶颈。