Title: Enzymatic Properties of Phosphoenolpyruvate Carboxylase of Purified Chloroplasts from CAM-Performing Kalanchoe blossfeldiana Poelln. Plants
Abstract: A phosphoenolpyruvate carboxylase (PEPC) (EC 4.1.1.3) activity was associated with, the Percoll purified chloroplasts from Kalanchoe blossfeldiana leaves performing crassulacean acid metabolism (CAM) (plants grown under short-day conditions). Very little PEPC activity was detected in the chloroplasts when the plants were grown under long days, performing a C3-type photosynthetic metabolism. The PEPC activity measured in the chloroplasts from CAM-plants was very sensitive to such effectors as glucose-6-phosphate (G-6-P) and malate: the initial activity of PEPC in the presence of 1.2 mM PEP was 400% activated by 10 mM G-6-P and was 25% inhibited by 1 mM malate. These results show that the PEPC in the chloroplasts has the enzymatic characteristics described by Brulfert and Queiroz [(1982) Planta 154: 339] for PEPC extracted from CAM-performing K. blossfeldiana leaves.
Publication Year: 1986
Publication Date: 1986-07-01
Language: en
Type: article
Indexed In: ['crossref']
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