Effects of monosulfuron-ester on metabolic processes of nitrogen-fixing cyanobacteria Anabaena flos-aquae and Anabaena azotica
Braz. j. microbiol
; 48(3): 544-550, July-Sept. 2017. tab, graf
Article
in En
| LILACS
| ID: biblio-889154
Responsible library:
BR1.1
ABSTRACT
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.
Key words
Full text:
1
Collection:
01-internacional
Database:
LILACS
Main subject:
Pyrimidines
/
Sulfonylurea Compounds
/
Anabaena
/
Dolichospermum flos-aquae
/
Esters
/
Herbicides
/
Nitrogen Fixation
Language:
En
Journal:
Braz. j. microbiol
Journal subject:
MICROBIOLOGIA
Year:
2017
Document type:
Article
/
Project document
Affiliation country:
China
Country of publication:
Brazil