Effects of monosulfuron-ester on metabolic processes of nitrogen-fixing cyanobacteria Anabaena flos-aquae and Anabaena azotica

AUTOR(ES)

Shen, Jian Ying, Liao, Jin Zhi, Guo, Li Li, Su, Rui Fang

FONTE

Braz. J. Microbiol.

DATA DE PUBLICAÇÃO

2017-07

RESUMO

Abstract Presence of the relatively new sulfonylurea herbicide monosulfuron-ester at 0.03-300 nmol/L affected the growth of two non-target nitrogen-fixing cyanobacteria (Anabaena flos-aquae and Anabaena azotica) and substantially inhibited in vitro Acetolactate synthase activity, with IC50 of 3.3 and 101.3 nmol/L for A. flos-aquae and A. azotica, respectively. Presenting in 30-300 nmol/L, it inhibited protein synthesis of the cyanobacteria with less amino acids produced as its concentration increased. Our findings support the view that monosulfuron-ester toxicity in both nitrogen-fixing cyanobacteria is due to its interference with protein metabolism via inhibition of branch-chain amino acid biosynthesis, and particularly Acetolactate synthase activity.

Documentos Relacionados

• Determination of Cu Environments in the Cyanobacterium Anabaena flos-aquae by X-Ray Absorption Spectroscopy
• Uptake and Utilization of Sugar Phosphates by Anabaena flos-aquae1
• Dissolved Nitrogen Uptake by a Cyanobacterial Bloom (Anabaena flos-aquae) in a Subarctic Lake
• Unicellular, aerobic nitrogen-fixing cyanobacteria of the genus Cyanothece.
• Differential Responses of Nitrogen-Fixing Cyanobacteria to Salinity and Osmotic Stresses