Nobel PS, Luttge U, Heuer S, Ball E (1984) Influence of applied NaCI on crassulacean acid
metabolism and ionic levels in a cactus, Cereus validus.
 Smith, J.A.C., Marigo, G., Luettge, U., and Ball, E., 1982, "Adenine-nucleotide levels during crassulacean acid
metabolism and the energetics of malate accumulation in Kalanchoe tubiflora," Plant Sci.
metabolism: a re-appraisal of physiological plasticity in form and function.
Evidence of crassulacean acid
metabolism in two North American isoetids.
Silvera K, Santiago LS, Winter K (2005) Distribution of crassulacean acid
metabolism in orchids of Panama: evidence of selection for weak and strong modes.
Also, Crassulacean acid
metabolism (CAM) may be induced by drought in facultative plants and is generally considered an adaptive response to water deficit because its operation increases water use efficiency, i.e.
Cushman JC, Borland AM (2002) Induction of crassulacean acid
metabolism by water limitation.
Cactus pear is a xerophile plant and its physiology is characterized by the photosynthetic process called Crassulacean acid
metabolism (CAM) and, under stress conditions, water is saved due to stomatal closure during the day and opening during the night with C[O.sub.2] fixation.
Depending on a form of photosynthesis, known as crassulacean acid
metabolism (CAM), plants thrive in drylands by keeping their stomata, or pores, shut during the day to conserve water and open at night to collect carbon dioxide.
Agave species assembled an important group of crassulacean acid
metabolism (CAM) plants with remarkable tolerance to heat and drought stresses in arid regions .
The Opuntioid cacti represent the most spectacular species of succulent plants, which are characterized by a shallow root system that permits rapid water uptake; a thick, waxy cuticle that prevents excessive water loss; and crassulacean acid
metabolism (CAM), an alternative photosynthetic pathway, that allows plants to uptake atmospheric C[O.sub.2] at night when water loss is minimized .
In the desert, where water is in short supply, some plants use a different network of chemical reactions to make energy: crassulacean acid
metabolism, or CAM.