title: Chlorophyll a fluorescence and photosynthetic activity as tools for the evaluation of simazine toxicity to Protosiphon botryoides and Anabaena variabilis.
abstract: On studying the effect of simazine on Protosiphon botryoides and Anabaena variabilis, data revealed that chlorophyll a content and dry weight were decreased with the increase in simazine concentration. High concentration of simazine (0.8 mg L(-1)) reduced gross photosynthesis and carbohydrate content, whereas protein content and respiration rate were increased. Algal cell recovery from simazine toxic effect occurred after 2 and 4 days for Anabaena and Protosiphon, respectively, which may be attributed to the difference in algal genotype of the tested organisms.
authors.affiliation: Botany Department, Faculty of Science, Cairo University, Egypt.
authors.forename: I A
authors.initials: IA
authors.lastname: Kobbia
authors.forename: M G
authors.initials: MG
authors.lastname: Battah
authors.forename: E F
authors.initials: EF
authors.lastname: Shabana
authors.forename: H M
authors.initials: HM
authors.lastname: Eladel
mesh_terms: D017033:Anabaena / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D050260:Carbohydrate Metabolism; D002452:Cell Count; D002734:Chlorophyll / Q000378:metabolism*; D000077194:Chlorophyll A; D000460:Chlorophyta / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D005453:Fluorescence; D006540:Herbicides / Q000633:toxicity*; D010788:Photosynthesis / Q000187:drug effects*; D010940:Plant Proteins / Q000378:metabolism; D012839:Simazine / Q000633:toxicity*; D013997:Time Factors; D018675:Toxicity Tests
chemical_list: D006540:Herbicides; D010940:Plant Proteins; D002734:Chlorophyll; D012839:Simazine; D000077194:Chlorophyll A