title: Effect of glucose and light-dark environment on pigmentation profiles in the cyanobacterium Calothrix elenkenii.
abstract: Calothrix elenkenii was evaluated for accumulation of chlorophyll, beta-carotene and phycobiliproteins when grown under light-dark cycles and darkness, in the presence of glucose. Highest values of beta-carotene, chlorophyll, proteins and acetylene-reducing activity were recorded when the organism was grown in the presence of glucose under light-dark cycles after 15 d of incubation. The presence of glucose in the medium stimulated pigment production, especially of beta-carotene and chlorophyll, which may be due to increased energy-linked assimilation and ATP production. The photoheterotrophic potential of C. elenkenii can be exploited in value addition for increased and economic production of pigments.
authors.affiliation: National Center for Conservation and Utilization of Blue-Green Algae, Indian Agricultural Research Institute, New Delhi 110 012, India. radha_pr2003@yahoo.com
authors.forename: R
authors.initials: R
authors.lastname: Prasanna
authors.forename: A
authors.initials: A
authors.lastname: Pabby
authors.forename: P K
authors.initials: PK
authors.lastname: Singh
mesh_terms: D000114:Acetylene / Q000378:metabolism; D000255:Adenosine Triphosphate / Q000096:biosynthesis; D002734:Chlorophyll / Q000032:analysis / Q000096:biosynthesis; D000458:Cyanobacteria / Q000166:cytology / Q000378:metabolism*; D003624:Darkness; D004734:Energy Metabolism; D005947:Glucose / Q000378:metabolism*; D007700:Kinetics; D008027:Light; D045342:Light-Harvesting Protein Complexes / Q000032:analysis / Q000096:biosynthesis; D010084:Oxidation-Reduction; D010858:Pigmentation / Q000502:physiology; D010860:Pigments, Biological / Q000096:biosynthesis*; D013997:Time Factors; D019207:beta Carotene / Q000032:analysis / Q000096:biosynthesis
chemical_list: D045342:Light-Harvesting Protein Complexes; D010860:Pigments, Biological; D019207:beta Carotene; D002734:Chlorophyll; D000255:Adenosine Triphosphate; D005947:Glucose; D000114:Acetylene