The bladders in the brown algae are sometimes used for the algae to receive more light for photosynthesis. These bladder-like structures help the certain part to float for it to receive more light. These structures are called Pneumatocysts.
The pneumatocysts are air filled like increasing buoyancy to the structure. With these structures, the photosynthesis of the plant is increased or enhanced since its exposure to light is maximized.
The following are the usual gas content of pneumatocysts:
- oxygen
- nitrogen
- carbon dioxide
The sizes of these bladder-like structures usually vary as well as its gas content. The proportion of the gases found in the pneumatocysts usually varies depending on the physiological status of the alga and the partial pressure of gases in the surrounding air or water.
For more information, you may read about brown algae:
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