Details

Autor(en) / Beteiligte

• Reddy, Attipalli R.
• Rasineni, Girish K.
• Raghavendra, Agepati S.

Titel

The impact of global elevated CO₂ concentration on photosynthesis and plant productivity

Ist Teil von

• Current science (Bangalore), 2010-07, Vol.99 (1), p.46-57

Ort / Verlag

Current Science Association

Erscheinungsjahr

2010

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• 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 CO₂ on photosynthesis in different groups of higher plants. Significant variation exists in the physiological, biochemical and molecular responsiveness to elevated CO₂ atmosphere, among terrestrial plant species including those with C₃, C₄ 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 CO₂ concentration. The effects of elevated CO₂ 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.