<sup>13</sup>C/<sup>12</sup>C Ratio Changes in Crassulacean Acid Metabolism Plants

Bender, Margaret M; Rouhani, I.; Vines, H. M.; Black, Clanton C.

doi:10.1104/pp.52.5.427

Cited by 194 publications

(58 citation statements)

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“…Laboratory studies have shown the carbon isotope ratio of a single species of CAM plant undergoes an actual shift in value in response to controlled growth conditions (1,3,9,12,15). Field studies with succulent plants suspected of being CAM have shown a relationship between environmental conditions and carbon isotope ratio (10,11,14,16 Titratable Acidity.…”

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“…The photosynthetic metabolism can be shifted from CAM to C3 metabolism (1,3), with a mean shift in the total tissue o-t3C value ranging from 3 to 4 0/oo (our calculation from original data). Additionally, the photosynthetic metabolism can be shifted from C3 to CAM metabolism (9, 15) with a mean shift in the total tissue o-13C value ranging from 6 to 8 0/oo (our calculation from original data).…”

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Carbon Isotope Ratios in Crassulacean Acid Metabolism Plants

Szarek

Troughton²

1976

Plant Physiol.

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Carbon Isotope Ratios in Crassulacean Acid Metabolism Plants

Szarek

Troughton²

1976

Plant Physiol.

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“…Bender et al (2) have suggested the "C/'lC ratios of Crassulaccan acid metabolism plants are indicative of CO3 fixation by RuDP or PEP carboxylase. Lerman et al (11) have advanced the idea that the wide range of 8 DBC values is due to the contribution of C3 and C4 pathways in Crassulaccan acid metabolism plants.…”

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Isotope Fractionation in Photosynthetic Bacteria during Carbon Dioxide Assimilation

1975

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The 5 pDBC values have been determined for the cellular constituents and metabolic intermediates of autotrophically grown Chromatium vinosum. The isotopic composition of the HCO3-in the medium and the carbon isotopic composition of the bacterial cells change with the growth of the culture. The B pDBC value of the HC03-in the media changes from an initial value of -6.6%o to +8.1%, after 10 days of bacterial growth and the a p 13C value of the bacterial cells change from -37.5%c to -29.2%, in the same period. The amount of carbon isotope fractionation during the synthesis of hexoses by the photoassimilation of CO, has a range of -15.5%c at time zero to -22.0%, after 10 days. This range of fractionation compares to the range of carbon isotope fractionation for the synthesis of sugars from C02 by ribulose 1,5-diphosphate carboxylase and the Calvin cycle.The amount of carbon isotope fractionation during the synthesis of aspartic acid from CO2 iS -24.9%S at time zero and -15.0,i after 10 days of bacterial growth. This amount of fractionation is in the range of carbon isotope fractionation for the synthesis of C, amino acids by a double carboxylation through ribulose 1, 5-diphosphate and phosphoenolpyruvate carboxvlase.-18 to -34%c; whereas carboxylation by PEP carboxylase causes an average fractionation of -3%S (19). (11) have advanced the idea that the wide range of 8 DBC values is due to the contribution of C3 and C4 pathways in Crassulaccan acid metabolism plants.Carbon metabolism in autotrophically grown Chromatium has been intensively investigated (10, 12), but there is no information on carbon isotope fractionation in this organism. The work in this paper was done to determine the amount of carbon isotope fractionation occurring in the synthesis of hexoses and C, amino acids in autotrophically grown Chromatium. MATERIALS AND METHODSSmith and Epstein (16)

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“…The C 4 pathway in grasses is favored by warmer temperatures (Ehleringer et al 1997;Long 1999;Teeri and Stowe 1976), while C 4 dicotyledonous taxa are associated with increased aridity (Ehleringer et al 1997;Long 1999;Stowe and Teeri 1978). The final pathway, termed CAM (crassulacean acid metabolism), is used by most succulents (Bender et al 1973;Ranson and Thomas 1960). CAM plants can mimic either C 3 or C 4 stable carbon isotopic signatures and have ranges from around -33 to -14 mill (Bender et al 1973;Griffiths 1992).…”

Section: Shifts In Vegetation Structure Suggested By Changes In Soil mentioning

confidence: 99%

“…The final pathway, termed CAM (crassulacean acid metabolism), is used by most succulents (Bender et al 1973;Ranson and Thomas 1960). CAM plants can mimic either C 3 or C 4 stable carbon isotopic signatures and have ranges from around -33 to -14 mill (Bender et al 1973;Griffiths 1992). However, in Central and South Texas, CAM plants seem to produce isotopic signatures that are comparable to the lower range of C 4 plants (see Boutton et al 1998: 18;.…”

Section: Shifts In Vegetation Structure Suggested By Changes In Soil mentioning

confidence: 99%