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- Title
Characterization of very long chain fatty acid synthesis inhibition by ipfencarbazone.
- Authors
Tatsuya KASAHARA; Hiroshi MATSUMOTO; Hisakazu HASEGAWA; Kohei KOYAMA; Takashi TAKEUCHI
- Abstract
Ipfencarbazone exhibits excellent herbicidal activity against Echinochloa spp. and is safe for rice. The effects of ipfencarbazone on very long chain fatty acid (VLCFA) elongation in rice and late watergrass and its inhibitory mechanism were investigated in this study. Although ipfencarbazone inhibited VLCFA elongation in the microsomes prepared from late watergrass and rice at low concentrations, the inhibitory effect was higher in late watergrass than in rice. These results suggested that the primary site of action of ipfencarbazone is VLCFA elongase (VLCFAE) and ipfencarbazone has a differential affinity between the VLCFAEs of the plants. The inhibitory activity of ipfencarbazone became higher in proportion to pre-incubation period with the VLCFAE. The degree of inhibition did not decrease by dilution of the VLCFAE-ipfencarbazone complex. These results suggested that ipfencarbazone binds to the VLCFAE irreversibly.
- Subjects
FATTY acid synthesis; ECHINOCHLOA; RICE; HOKKO Chemical Industry Co. Ltd.; AMERICAN Radiolabeled Chemicals Inc.
- Publication
Journal of Pesticide Science, 2019, Vol 44, Issue 1, p20
- ISSN
1348-589X
- Publication type
Article
- DOI
10.1584/jpestics.D18-057