Abstract
Rice, Oryza sativa L. is the staple food of half of the world’s population, mostly in Asia. Therefore, it is essential to increase rice yield to meet the rising food demand by the year 2050. This target is further challenged by rising atmospheric temperature, rainfall extreme events and limited land availability. The designing of C4 rice along with greater efficiencies of water, nitrogen and radiation use, has been identified as one of the best pathways to increase yield potential. Increased leaf vein density is an essential prerequisite for C4 photosynthesis. It facilitates rapid exchange of C4 carbon intermediates and photo-assimilates and has been identified as a new trait for genetic engineering of C4 photosynthesis into C3 crops.
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