Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8842617 | Brazilian Journal of Microbiology | 2017 | 7 Pages |
Abstract
Presence of the relatively new sulfonylurea herbicide monosulfuron-ester at 0.03-300Â 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 101.3Â nmol/L for A. flos-aquae and A. azotica, respectively. Presenting in 30-300Â 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.
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Authors
Jian Ying Shen, Jin Zhi Liao, Li Li Guo, Rui Fang Su,