Alternative Carbohydrate Reserves Used in the Daily Cycle of Crassulacean Acid Metabolism

Black, Clanton C.; Chen, J.-Q.; Doong, R.L.; Angelov, M.; Sung, Shi-Jean S.

doi:10.1007/978-3-642-79060-7_3

Cited by 35 publications

(23 citation statements)

References 34 publications

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“…Three PEPCK species store extrachloroplastic carbohydrates (A. comosus, C. rosea, A. arborescens). On the basis of these observations it has been suggested that CAM species that have ME as the major decarboxylase use starch as the major fluctuating carbohydrate pool, whereas species having PEPCK as the major decarboxylase tend to store extrachloroplastic carbohydrates Fahrendorf et al, 1987;Smith and Bryce, 1992;Black et al, 1996).…”

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confidence: 99%

Patterns of Carbon Partitioning in Leaves of Crassulacean Acid Metabolism Species during Deacidification

Christopher

Holtum

1996

Plant Physiology

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Carbohydrates stored during deacidification i n the light were examined in 11 Crassulacean acid metabolism (CAM) species from widely separated taxa grown under uniform conditions. The hypothesis that NAD(P) malic enzyme CAM species store chloroplastic starch and glucans, and phosphoenolpyruvate carboxykinase species store extrachloroplastic sugars or polymers was disproved. Of the six malic enzyme species examined, Kalanchoe tubiflora, Kalanchoe pinnafa, Kalanchoe daigremontiana, and Vanilla planifolia stored mainly starch. Sansevieria hahnii stored sucrose and Agave guadalajarana did not store starch, glucose, fructose, or sucrose. O f the five phosphoenolpyruvate carboxykinase species investigated, Ananus comosus stored extrachloroplastic carbohydrate, but Stapelia gigantea, Hoya carnosa, and Portea petropolitana stored starch, whereas Aloe vera stored both starch and glucose. Within families, the major decarboxylase was common for ali species examined, whereas storage carbohydrate could differ both between and within genera. I n the Bromeliaceae, A. comosus stored mainly fructose, but P. petropolitana stored starch. In the genus Aloe, A. vera stored starch and glucose, but A. arborescens is known t o store a galactomannan polymer. We postulate that the observed variation in carbohydrate partitioning between CAM species is the result of two principal components: (a) constraints imposed by the CAM syndrome itself, and (b) diversity in biochemistry resulting from different evolutionary histories.

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Patterns of Carbon Partitioning in Leaves of Crassulacean Acid Metabolism Species during Deacidification

Christopher

Holtum

1996

Plant Physiology

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“…It seems that G6P can relax the inhibition of PEPC by malate. The relaxation of PEPC by G6P in pineapple leaves could occur easily because both PEPC and G6P are located in the cytoplasm (Black et al, 1996). Therefore, with decreasing the absolute level of G6P under HNT (Fig.…”

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confidence: 99%

Effects of High Night Temperature on Crassulacean Acid Metabolism (CAM) Photosynthesis ofKalanchoë pinnataandAnanas comosus

Lin

Abe

Nose

et al. 2006

Plant Production Science

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“…However, although starch in the chloroplasts of CAM plants was previously identified as the likely carbon source for the synthesis of organic acids, other researchers have since determined that only small amounts of the carbon are actually derived from starch (cf., Black et al, 1996). For CAM to function, nocturnal acid accumulation must be balanced by a substantial carbohydrate supply.…”

Section: Discussionmentioning

confidence: 99%

Changes in the plastid ultrastructure duringSedum rotundifolium leaf development

Kim

2006

J. Plant Biol.

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The ultrastructure of plastids was investigated in succulent leaves of Sedum rotundifolium to examine their changes during development. Leaves were categorized as etiolated, immature, young, and mature, based on their developmental stage and size. Of particular interest were the features of the tubular inclusion bodies (TIBs) and starch grains. These, along with vacuole size, showed remarkable changes over time. Etioplasts of unexposed leaves had prolamellar bodies, abundant starch grains, large TIB, few plastoglobuli, and thylakoid systems. Membranes of the thylakoids were still continuous with those of the prolamellar body. The plastids were often influenced by the presence and profile of inclusion bodies and starch grains throughout the early stages. Morphology was highly variable in the etioplasts but consistently hemispherical or ovoid in mature chloroplasts. T|B was most abundant in the etiolated leaves, but disappeared completely with development. Starch grains also became significantly reduced in size. Both young and mature mesophyll cells exhibited a normal chloroplast ultrastructure and huge central vacuoles, with an extremely thin peripheral cytoplasm. Grana were extensive and comprised a large portion of the chloroplasts. Traces of peripheral reticulum were also discovered in the chloroplasts of expanded leaves. The implications of these ultrastructural changes in the tubular inclusions and starch grains are discussed with relevance to Crassulacean acid metabolism (CAM).

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Alternative Carbohydrate Reserves Used in the Daily Cycle of Crassulacean Acid Metabolism

Cited by 35 publications

References 34 publications

Patterns of Carbon Partitioning in Leaves of Crassulacean Acid Metabolism Species during Deacidification

Patterns of Carbon Partitioning in Leaves of Crassulacean Acid Metabolism Species during Deacidification

Effects of High Night Temperature on Crassulacean Acid Metabolism (CAM) Photosynthesis ofKalanchoë pinnataandAnanas comosus

Changes in the plastid ultrastructure duringSedum rotundifolium leaf development

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