Does C4 Photosynthesis Occur in Wheat Seeds

Niyogi KK (2000) Safety valves for photosynthesis. Current Opinion in Plant Biology 3: 455–460.

A global database of C 4 photosynthesis in grasses

Summary of the different photosynthetic pathways. C3 plants fix CO2 directly, using the enzyme ribulose bisphosphate carboxylase oxygenase (Rubisco), reaction CO2 with ribulose bisphosphate (RuBP) to form PGA in the chloroplasts of the mesophyll. C4 plants react PEP carboxylase to react CO2 with phosphoenolpyruvate (PEP) to form oxaloacetic acid, which is in turn converted to malate. This is transferred to the bundle sheath, where malate is broken down to release CO2, which is used by Rubisco. CAM plants use PEP carboxylase to fix CO2 at night and then break down the malate so produced during the day to provide CO2 for Rubisco.

Sage RF (2004) The evolution of C4 photosynthesis. New Phytologist 161: 341–370.

C4 Photosynthesis - IB Biology HELP

Photosynthesis is the process by which plants convert light energy into chemical energy for use in growth and cellular repair. The ability of plants to capture light energy, carry out photosynthesis and grow is affected by many environmental factors including temperature, water and nutrient supply. Plants living in natural environments are also subject to competition and shading from other plants and have a number of biochemical and morphological adaptations to increase the efficiency of light absorption, whilst avoiding light stress. Various adaptations of photosynthesis exist that allow plants to tolerate extreme environmental conditions. Ultimately, the overall net photosynthetic rate of ecosystems has a major impact on the global carbon budget. These impacts may be significantly altered by global warming and subsequent climate change.

As part of this conference a free public lecture will be delivered by Rowan Sage on “The Evolution of C4 Photosynthesis”

Forget C3 and C4 photosynthesis, give me CAM photosynthesis baby! Oh and to Curtis, its the same cosmic radiation youre subjected to when you walk outside each. Photosynthesis Article 2013

Paul MJ and Foyer CH (2001) Sink regulation of photosynthesis. Journal of Experimental Botany 52: 1383–1400.