GAF1 is 4-Formylaminooxyvinylglycine, a herbicidal germination-arrest factor from Pseudomonas rhizosphere bacteria. It is present in a number of soil bacteria, and applied for control the numerous grassy weeds (McPhail KL, Armstrong DJ, Azevedo MD, Banowetz GM, Mills DI.. J Nat Prod. 2010 Nov 29;73(11):1853-7.)
Is GAF1 a weed-specific herbicide, or it can be effective agaist some cultivated plants as well?
plz inter this site http://www.google.tl/patents/US20090105074
In Kuttanad rice ecosystem of Kerala, India cultivation of organic rice using Pseudomonas fluorescense under wet land situation has shown reduction in weed population under continuous organic cultivation. Experiments are going on at Rice Research Station, Moncompu
The oxyvinylglycines has been shown to interfere with enzymes that utilize pyridoxal phosphate as a cofactor, including enzymes involved in nitrogen metabolism and biosynthesis of the plant hormone ethylene (Berkowitz et al., 2006; Halgren et al., 2013).
Berkowitz, D. B., Charette, B. D., Karukurichi, K. R., and Mcfadden, J. M. (2006). Alpha-vinylic amino acids: occurrence, asymmetric synthesis, and biochemical mechanisms. Tetrahedron Asymmetry 17, 869–882. doi: 10.1016/j.tetasy.2006.02.026
Halgren, A., Maselko, M., Azevedo, M., Mills, D., Armstrong, D., and Banowetz, G. (2013). Genetics of germination-arrest factor (GAF) production by Pseudomonas fluorescens WH6: identification of a gene cluster essential for GAF biosynthesis. Microbiology 159, 36–45. doi: 10.1099/mic.0.062166-0
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