scholarly journals Does the C4 plant Trianthema portulacastrum (Aizoaceae) exhibit weakly expressed crassulacean acid metabolism (CAM)?

2020 ◽  
Author(s):  
Klaus Winter ◽  
Milton Garcia ◽  
Aurelio Virgo ◽  
Jorge Ceballos ◽  
Joseph A. M. Holtum
Keyword(s):  
Crassulacean Acid Metabolism ◽  
Acid Metabolism ◽  
C4 Plant ◽  
Trianthema Portulacastrum

scholarly journals Corrigendum to: Does the C4 plant Trianthema portulacastrum (Aizoaceae) exhibit weakly expressed crassulacean acid metabolism (CAM)?

2021 ◽  
Vol 48 (12) ◽  
pp. 1315
Author(s):  
Klaus Winter ◽  
Milton Garcia ◽  
Aurelio Virgo ◽  
Jorge Ceballos ◽  
Joseph A. M. Holtum
Keyword(s):  
Crassulacean Acid Metabolism ◽  
Acid Metabolism ◽  
Co2 Exchange ◽  
Co2 Uptake ◽  
C4 Plant ◽  
Low Level ◽  
Kranz Anatomy ◽  
Trianthema Portulacastrum ◽  
Annual Herb ◽  
Kinetics Of

We examined whether crassulacean acid metabolism (CAM) is present in Trianthema portulacastrum L. (Aizoaceae), a pantropical, salt-tolerant C4 annual herb with atriplicoid-type Kranz anatomy in leaves but not in stems. The leaves of T. portulacastrum are slightly succulent and the stems are fleshy, similar to some species of Portulaca, the only genus known in which C4 and CAM co-occur. Low- level nocturnal acidification typical of weakly expressed, predominantly constitutive CAM was measured in plants grown for their entire life-cycle in an outdoor raised garden box. Acidification was greater in stems than in leaves. Plants showed net CO2 uptake only during the light irrespective of soil water availability. However, nocturnal traces of CO2 exchange exhibited curved kinetics of reduced CO2 loss during the middle of the night consistent with low-level CAM. Trianthema becomes the second genus of vascular land plants in which C4 and features of CAM have been demonstrated to co-occur in the same plant and the first C4 plant with CAM-type acidification described for the Aizoaceae. Traditionally the stems of herbs are not sampled in screening studies. Small herbs with mildly succulent leaves and fleshy stems might be a numerically significant component of CAM biodiversity.

Kinetic Properties of Phosphorylase and 6-Phosphofructokinase of Kalanchoe daigremontiana and Atriplex spongiosa

1975 ◽  
Vol 2 (3) ◽  
pp. 403 ◽  
Author(s):  
G Sutton
Keyword(s):  
Carbohydrate Metabolism ◽  
Crassulacean Acid Metabolism ◽  
Acid Metabolism ◽  
Kinetic Properties ◽  
C4 Plant ◽  
Cam Plants ◽  
Regulation Of Carbohydrate Metabolism ◽  
Cam Plant ◽  
Kalanchoë Daigremontiana ◽  
Kalanchoe Daigremontiana

The kinetic properties of phosphorylase (EC 2.4.1.1) and 6-phosphofructokinase (EC 2.7.1.11) extracted from a crassulacean acid metabolism (CAM) plant, Kalanchoe daigremontiana Hamet et Perrier, and a C4 plant, Atriplex spongiosa F. Muell., were compared. The phosphorylase from the CAM plant was strongly inhibited by P1 (1 mM), phosphoenolpyruvate (PEP) (2 mM) and glucose (4 mM). The C4 phosphorylase was less strongly inhibited by P1, and not at all by PEP or glucose. The C4 6-phosphofructokinase was, at Km levels of substrate, about 100 times more sensitive to inhibition by PEP than the CAM enzyme. These results are discussed as the basis for a biochemical regulation of carbohydrate metabolism in CAM plants at night.

scholarly journals Carbon Isotope Ratios in Crassulacean Acid Metabolism Plants

1976 ◽  
Vol 58 (3) ◽  
pp. 367-370 ◽  
Author(s):  
Stan R. Szarek ◽  
John H. Troughton
Keyword(s):  
Carbon Isotope ◽  
Crassulacean Acid Metabolism ◽  
Acid Metabolism ◽  
Isotope Ratios ◽  
Carbon Isotope Ratios

Historical aspects and net CO2 uptake for cultivated Crassulacean acid metabolism plants in Mexico

2002 ◽  
Vol 140 (2) ◽  
pp. 133-142 ◽  
Author(s):  
PARK S NOBEL ◽  
EULOGIO PIMIENTA-BARRIOS ◽  
JULIA ZANUDO HERNANDEZ ◽  
BLANCA C RAMIREZ-HERNANDEZ
Keyword(s):  
Crassulacean Acid Metabolism ◽  
Acid Metabolism ◽  
Co2 Uptake ◽  
Historical Aspects ◽  
Net Co2 Uptake

scholarly journals Molecular Genetics of Crassulacean Acid Metabolism

1997 ◽  
Vol 113 (3) ◽  
pp. 667-676 ◽  
Author(s):  
J. C. Cushman ◽  
H. J. Bohnert
Keyword(s):  
Molecular Genetics ◽  
Crassulacean Acid Metabolism ◽  
Acid Metabolism
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