Effects of Monosulfuron-ester on Metabolic Processes of Nitrogen-fixing Cyanobacteria Anabaena Flos-aquae and Anabaena Azotica

Overview

Journal Braz J Microbiol

Specialty Microbiology

Date 2017 Apr 30

PMID 28454676

Authors

Jian Ying Shen

Jin Zhi Liao

Li Li Guo

Rui Fang Su

Affiliations

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Abstract

Presence of the relatively new sulfonylurea herbicide monosulfuron-ester at 0.03-300nmol/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 IC of 3.3 and 101.3nmol/L for A. flos-aquae and A. azotica, respectively. Presenting in 30-300nmol/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.

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