crassulacean acid metabolism

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crassulacean acid metabolism

[‚kras·ə¦lā·shən ¦as·əd mə′tab·ə‚liz·əm]
(botany)
A type of photosynthesis exhibited by many succulent plants in which carbon dioxide is taken up and stored during the night to allow the stomata to remain closed during the daytime, decreasing water loss. Abbreviated CAM.
References in periodicals archive ?
Though the CAM pathway is usually associated with a succulent growth form, there are succulent plants such as halophytes that do not possess it, and some CAM species are more accurately described as semisucculents.
In the lacustrine habitat, the CAM pathway contributes about 50% of the total annual carbon gain, largely through the extension of the carbon assimilation period (Boston & Adams, 1986).
As the dry season approaches, and these aerial plants are exposed to increasing aridity, they do not regain the CAM pathway. Many eulittoral lacustrine species also will switch off CAM upon exposure (Table V).