The impact of global elevated CO2 concentration on photosynthesis and plant productivity
The impact of global elevated CO2 concentration on photosynthesis and plant productivity
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发表时间：
2010
期刊：
影响因子：
1
通讯作者：
A. R. Reddy;G. K. Rasineni;A. S. Raghavendra
中科院分区：
文献类型：
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作者：
A. R. Reddy;G. K. Rasineni;A. S. Raghavendra
在全球气候变化的背景下，大气中温室气体浓度的惊人和前所未有的上升，迫切需要了解与植物生长和生产力相关的协同和整体机制。光合作用是地球上总碳的一个主要固存和转化过程。关于气候变化影响的大量文献表明，二氧化碳浓度上升对不同高等植物群体的光合作用既有积极的影响，也有消极的影响。陆生植物对co2大气浓度升高的生理生化和分子响应存在显著差异，包括具有c3、c4和天冬氨酸代谢（CAM）途径的陆生植物。然而，在不同植物中，遗传组织对种间和种内代谢可塑性的调控事件知之甚少。植物对气候变化的适应性驯化反应一直是矛盾的。本文主要综述了全球气候变化对植物生长和生产力的影响，特别是对co2浓度升高的适应性光合适应反应。探讨了co2浓度升高对植物生长发育、源库平衡的影响及其与水分、温度、矿质营养等环境因子的交互作用机制。
The alarming and unprecedented rise in the atmospheric concentration of greenhouse gases under global climate change warrants an urgent need to understand the synergistic and holistic mechanisms associated with plant growth and productivity. Photosynthesis is a major process of sequestration and turnover of the total carbon on the planet. The extensive literature on the impacts of climate change demonstrates both positive and negative effects of rising CO 2 on photosynthesis in different groups of higher plants. Significant variation exists in the physiological, biochemical and molecular responsiveness to elevated CO 2 atmosphere, among terrestrial plant species including those with C 3 , C 4 and crassulacean acid metabolic (CAM) pathways. However, the regulatory events associated with the inter- and intraspecific metabolic plasticity governed by genetic organization in different plants are little understood. The adaptive acclimation responses of plants to changing climate remain contradictory. This review focuses primarily on the impacts of global climate change on plant growth and productivity with special reference to adaptive photosynthetic acclimative responses to elevated CO 2 concentration. The effects of elevated CO 2 concentration on plant growth and development, source-sink balance as well as its interactive mechanisms with other environmental factors including water availability, temperature and mineral nutrition are discussed.