Nitrogen and phosphorus significantly alter growth, nitrogen fixation, anatoxin-a content, and the transcriptome of the bloom-forming cyanobacterium, Dolichospermum.

ABSTRACT: While freshwater cyanobacteria are traditionally thought to be limited by the availability of phosphorus (P), fixed nitrogen (N) supply can promote the growth and/or toxin production of some genera. This study characterizes how growth on N₂ (control), nitrate (NO₃ ^-), ammonium (NH₄ ⁺), and urea as well as P limitation altered the growth, toxin production, N₂ fixation, and gene expression of an anatoxin-a (ATX-A) - producing strain of Dolichospermum sp. 54. The transcriptomes of fixed N and P-limited cultures differed significantly from those of fixed N-deplete, P-replete (control) cultures, while the transcriptomes of P-replete cultures amended with either NH₄ ⁺ or NO₃ ^- wer

SUBMITTER: Kramer BJ 

PROVIDER: S-EPMC9490380 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature