Question
Given below are two statements Statement I: C₃
plants are more efficient than C₄ plants in terms of carbon dioxide fixation Statement II: C₄ plants are less water efficient and consume more amount of water then C₃ plans for same amount of CO₂ fixed. In light of the above statements, choose the correct answer from the options given belowSolution
C₄ plants are actually more efficient than C₃ plants in terms of carbon dioxide fixation. C₄ plants have adapted a more efficient carbon fixation pathway that allows them to minimize photorespiration and increase photosynthetic efficiency, particularly in high-temperature and high-light conditions. C₄ plant loses half as much as water as a C₃ plant as C₄ plants need not to open their stomata for long to take in carbon dioxide due to high efficiency of the C₄ pathway and this reduces water loss due to transpiration. The water loss per gram of biomass produced with C₃ cycle is high (450-950). However, the water loss per gram of biomass produced with C₄ cycle is low (250-350)
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