title: Iron induced metabolic changes in the diazotrophic cyanobacterium Anabaena PCC 7120.
abstract: Iron induced changes in growth, N2-fixation, CO2 fixation and photosynthetic activity were studied in a diazotrophic cyanobacterium Anabaena PCC 7120. Iron at 50 microM concentration supported the maximum growth, heterocyst frequency, CO2 fixation, photosystem I (PS I), photosystem II (PS II) and nitrogenase activities in the organism. Higher concentration of iron inhibited these processes. Chl a and PS II activities were more sensitive to iron than the protein and PS I activity.
authors.affiliation: Department of Microbiology, J.C.Bose Institute of Life Science, Bundelkhand University, Jhansi 284 128, India.
authors.forename: Rishi Kumar
authors.initials: RK
authors.lastname: Saxena
authors.forename: Ruchika
authors.initials: R
authors.lastname: Raghuvanshi
authors.forename: Surendra
authors.initials: S
authors.lastname: Singh
authors.forename: Prakash Singh
authors.initials: PS
authors.lastname: Bisen
mesh_terms: D017033:Anabaena / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism*; D002245:Carbon Dioxide / Q000378:metabolism; D002734:Chlorophyll / Q000378:metabolism; D000077194:Chlorophyll A; D007501:Iron / Q000494:pharmacology*; D009586:Nitrogen Fixation / Q000187:drug effects; D010788:Photosynthesis / Q000187:drug effects
chemical_list: D002734:Chlorophyll; D002245:Carbon Dioxide; D007501:Iron; D000077194:Chlorophyll A