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. 2017 Jun;174(2):473-477.
doi: 10.1104/pp.17.00195. Epub 2017 Apr 17.

On the Evolutionary Origin of CAM Photosynthesis

Andrea Bräutigam  1   2 , Urte Schlüter  3   4 , Marion Eisenhut  3   4 , Udo Gowik  3   4
Affiliations

On the Evolutionary Origin of CAM Photosynthesis

Andrea Bräutigam et al. Plant Physiol. 2017 Jun.

Abstract

Generation of carbon skeletons for amino acid synthesis in some C3 plants resembles fluxes needed for CAM-type photosynthesis.

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Figures

Figure 1.
Figure 1.
Daytime metabolism of organic acids in C3 and CAM plants; arrow thickness denotes flux. A, Organic acids are directly derived from photosynthesis during the day. This model is obsolete for many C3 species due to the results of flux analyses. B, In many C3 plants, the use of organic acids is based on organic acids produced and stored during the night according to flux analyses. C, Daytime metabolism of organic acids in CAM plants. 2-OG, Oxoglutarate; CBBc, Calvin-Benson-Bassham cycle; CHOs, carbohydrates; OAA, oxaloacetate; Pyr, pyruvate; TP, triosephosphate.
Figure 2.
Figure 2.
Nighttime metabolism of organic acids in C3 (A) and CAM (B) plants. AcCoA, Acetyl coenzyme A; CHOs, carbohydrates; OAA, oxaloacetate; PEP, phosphoenolpyruvate; Pyr, pyruvate.
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