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Natural tolerance of cyanobacteria to the herbicide glyphosate
Author(s) -
POWELL H. A.,
KERBBY N. W.,
ROWELL P.
Publication year - 1991
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1991.tb00042.x
Subject(s) - glyphosate , isopropylamine , cyanobacteria , shikimate pathway , anabaena variabilis , shikimic acid , aromatic amino acids , amino acid , anabaena , biology , botany , chemistry , biochemistry , bacteria , agronomy , genetics
summarySynechocystis PCC 6803 and Anabaena variabilis ATCC 29413 showed a high degree of tolerance to the herbicide glyphosate, applied as the free acid, the monoisopropylamine salt or the commercial formulation (Roundup > R). Differential toxicity between herbicide formulations was observed (Roundup > isopropylamine salt > free acid) and correlated with their rates of uptake. There was no evidence of glyphosate degradation. Shikimate accumulation, together with partial alleviation of inhibition by aromatic amino acids, suggests that the target site for glyphosate is in the pathway of aromatic amino acid biosynthesis.