Temperature response and thermal acclimation of mesophyll conductance

叶肉电导的温度响应和热驯化

• 批准号: DP140100488
• 负责人: Prof John Evans
• 金额: --
• 依托单位: The Australian National University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2014
• 资助国家: 澳大利亚
• 起止时间: 2014-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP140100488
• 关键词: Temperature; response; thermal; acclimation; mesophyll

Photosynthetic rate and efficiency depend on diffusion of carbon dioxide from the atmosphere into leaf mesophyll cells. Carbon dioxide diffusion is affected by temperature, but we lack knowledge of how this varies between plant species. Stable isotope methodology will be used to characterise the temperature response of this carbon dioxide diffusion step. Plants from contrasting climates will be grown in different temperature regimes to reveal the extent of variation in adaptation and acclimation to temperature. This will provide new insights towards modifying photosynthesis to increase crop yield and it will also improve forecasting of global atmospheric carbon dioxide fluxes derived from the analysis of atmospheric isotope data.

光合速率和效率取决于大气中二氧化碳向叶肉细胞的扩散。二氧化碳的扩散受温度的影响，但我们缺乏关于不同植物物种之间二氧化碳扩散的知识。将使用稳定同位素方法来确定该二氧化碳扩散步骤的温度响应。来自不同气候的植物将在不同的温度条件下生长，以揭示适应和驯化温度的变化程度。这将为改变光合作用以增加作物产量提供新的见解，还将改善对来自大气同位素数据分析的全球大气二氧化碳通量的预测。