scholarly journals Anapleurotic CO2 Fixation by Phosphoenolpyruvate Carboxylase in C3 Plants

1987 ◽  
Vol 84 (1) ◽  
pp. 58-60 ◽  
Author(s):  
Eva Melzer ◽  
Marion H. O'Leary
Keyword(s):  
Phosphoenolpyruvate Carboxylase ◽  
Co2 Fixation ◽  
C3 Plants

Is it possible to optimize CO2‐fixation in C3 plants?

1990 ◽  
Vol 4 (1) ◽  
pp. 535-535
Author(s):  
F. Kreuzaler ◽  
I. Becker ◽  
K. Düring ◽  
H. Kaulen ◽  
S. Lipphardt
Keyword(s):  
Co2 Fixation ◽  
C3 Plants

Photosynthetic Mechanisms of Weeds in Taiwan

1993 ◽  
Vol 20 (6) ◽  
pp. 757 ◽  
Author(s):  
CH Lin ◽  
YS Tai ◽  
DJ Liu ◽  
MSB Ku
Keyword(s):  
Malic Enzyme ◽  
Co2 Fixation ◽  
C4 Photosynthesis ◽  
C3 Plants ◽  
C4 Species ◽  
On This Island ◽  
High Precipitation ◽  
Biochemical Analyses ◽  
Pep Carboxykinase ◽  
First Time

One hundred and one species (in 36 families) of weeds on cultivated land in Taiwan were investigated for the occurrence of Kranz leaf anatomy and activities of key enzymes of C4 photosynthesis to determine their photosynthetic mechanisms. Based on the anatomical and biochemical analyses, 75 species were found to possess the C3 and 26 species the C4 pathway of photosynthetic CO2 fixation. Among the 26 C4 species, 15 species are in Gramineae, 6 in Cyperaceae, 2 each in Euphorbiaceae and Amaranthaceae, and 1 in Portulacaceae. Two C4 species in the Gramineae, namely Digitaria radicosa (Presl) Miq. and Sporobolus fertilis (Steud.) Clayton, were recorded as C4 plants for the first time. The biochemical subdivisions of these C4 weeds were also determined. As in the natural C4 populations, the NADP-malic enzyme subtype of C4 photosynthesis dominates the list of C4 weeds on this island (62%), while the PEP carboxykinase subtype is relatively rare (12%). NAD-malic enzyme subtype has an intermediate representation (26%). The high proportion of weeds in Taiwan being C3 plants is noteworthy, and it may be accounted for by the high precipitation in this subtropical island.

scholarly journals Differential Expression, Tissue-Specific Distribution, and Posttranslational Controls of Phosphoenolpyruvate Carboxylase

Plants ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 1887
Author(s):  
Lorrenne Caburatan ◽  
Joonho Park
Keyword(s):  
Posttranslational Modifications ◽  
Phosphoenolpyruvate Carboxylase ◽  
Protein Localization ◽  
General Information ◽  
C3 Plants ◽  
Tissue Specific ◽  
Regulatory Processes ◽  
Specific Distribution ◽  
Initial Fixation ◽  
Bacterial Type

Phosphoenolpyruvate carboxylase (PEPC) is a ubiquitous cytosolic enzyme, which is crucial for plant carbon metabolism. PEPC participates in photosynthesis by catalyzing the initial fixation of atmospheric CO2 and is abundant in both C4 and crassulacean acid metabolism leaves. PEPC is differentially expressed at different stages of plant development, mostly in leaves, but also in developing seeds. PEPC is known to show tissue-specific distribution in leaves and in other plant organs, such as roots, stems, and flowers. Plant PEPC undergoes reversible phosphorylation and monoubiquitination, which are posttranslational modifications playing important roles in regulatory processes and in protein localization. Phosphorylation activates the PEPC enzyme, making it more sensitive to glucose-6-phosphate and less sensitive to malate or aspartate. PEPC phosphorylation is known to be diurnally regulated and delicately changed in response to various environmental stimuli, in addition to light. PEPCs belong to a small gene family encoding several plant-type and distantly related bacterial-type PEPCs. This paper provides a minireview of the general information on PEPCs in both C4 and C3 plants.

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