Question

How do the $C_{4}$ and CAM adaptations to photosynthesis reduce water loss from plants?

   How do the $C_{4}$ and CAM adaptations to photosynthesis reduce water loss from plants?

Biology: Science for Life with Physiology

Biology: Science for Life with Physiology

Colleen Belk,… 5th Edition

Chapter 25, Problem 2

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Solved by Expert Marisa A

03/26/2023

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This process is known as transpiration. Show more…

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How do the $C_{4}$ and CAM adaptations to photosynthesis reduce water loss from plants?

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Key Concepts

C4 Photosynthesis

C4 photosynthesis is an adaptation where plants spatially separate the initial carbon fixation from the Calvin cycle, typically between mesophyll and bundle sheath cells. This separation allows them to concentrate CO2 around the enzyme Rubisco, reducing the need for prolonged stomatal opening and consequently minimizing water loss in high-temperature environments.

CAM Photosynthesis

CAM (Crassulacean Acid Metabolism) photosynthesis involves the temporal separation of carbon fixation and the Calvin cycle. Plants open their stomata at night to collect CO2, which is stored as organic acids, and then use this stored CO2 during daylight for photosynthesis when the stomata remain closed. This timing strategy significantly reduces water loss by limiting daytime transpiration.

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