title: Alteration of cylindrospermopsin production in sulfate- or phosphate-starved cyanobacterium Aphanizomenon ovalisporum.
abstract: The effect of sulfate and phosphate deprivation on cell growth and cylindrospermopsin level was studied in Aphanizomenon ovalisporum ILC-164. Sulfate starvation induced a characteristic reduction of cylindrospermopsin pool size on the basis of cell number and unit of dry mass of culture. Phosphorous starvation of A. ovalisporum cultures induced a lesser reduction of cylindrospermopsin pool size. This divergence in the pool size of cylindrospermopsin may be the consequence of different growth rate. To show the metabolic changes concomitant with reduction of cylindrospermopsin pool size were obtained by measurement of ATP sulfurylase and alkaline phosphatase activity. The present study is the first concerning the cylindrospermopsin content under sulfate starvation and discusses it in relation to phosphorous starvation.
authors.affiliation: Department of Botany, University of Debrecen, Faculty of Science, Debrecen, Hungary.
authors.forename: István
authors.initials: I
authors.lastname: Bácsi
authors.forename: Gábor
authors.initials: G
authors.lastname: Vasas
authors.forename: Gyula
authors.initials: G
authors.lastname: Surányi
authors.forename: Márta
authors.initials: M
authors.lastname: M-Hamvas
authors.forename: Csaba
authors.initials: C
authors.lastname: Máthé
authors.forename: Eszter
authors.initials: E
authors.lastname: Tóth
authors.forename: István
authors.initials: I
authors.lastname: Grigorszky
authors.forename: Attila
authors.initials: A
authors.lastname: Gáspár
authors.forename: Szilvia
authors.initials: S
authors.lastname: Tóth
authors.forename: George
authors.initials: G
authors.lastname: Borbely
mesh_terms: D000469:Alkaline Phosphatase / Q000378:metabolism; D000470:Alkaloids / Q000096:biosynthesis*; D046890:Aphanizomenon / Q000254:growth & development / Q000378:metabolism*; D001427:Bacterial Toxins / Q000096:biosynthesis*; D000087522:Cyanobacteria Toxins; D010710:Phosphates / Q000378:metabolism; D013430:Sulfate Adenylyltransferase / Q000378:metabolism; D013431:Sulfates / Q000378:metabolism; D014498:Uracil / Q000031:analogs & derivatives* / Q000096:biosynthesis
chemical_list: D000470:Alkaloids; D001427:Bacterial Toxins; D000087522:Cyanobacteria Toxins; D010710:Phosphates; D013431:Sulfates; C089595:cylindrospermopsin; D014498:Uracil; D013430:Sulfate Adenylyltransferase; D000469:Alkaline Phosphatase