Which outcome limits plant productivity when C4 photosynthesis is inhibited by a specific enzyme malfunction?

💡 Explanation

When a malfunctioning enzyme inhibits the C4 pathway, CO2 fixation efficiency decreases because the plant reverts to the less efficient C3 pathway exhibiting greater photorespiration under heat stress. Therefore, increased photorespiration limits productivity, rather than water loss, pigment reduction, or root function, which aren't directly tied C4 pathway inhibition.

• Which biome-altering phenomenon arises when deforestation increases freshwater runoff into coastal mangrove forests?
• Which effect occurs when a marine mammal experiences extended exertion in cold water resulting vasodilation?
• Which outcome occurs when a cryptic praying mantis inhabits regions experiencing deforestation?
• Which signaling outcome results when the 'waggle dance' recruitment behaviour of honeybees is disrupted by a local magnetic anomaly?
• Which outcome results when countercurrent exchange in fish gills is impaired near highly polluted effluent discharge?
• Which consequence results when a C4 plant's mesophyll cells are damaged, impairing PEP carboxylase function?