The effect of 2-benzylamino-1,3,5-triazines on photosynthetic electron transport (PET) was measured with thylakoids isolated from atrazine-resistant, wild-type Chenopodium album, and spinach to find novel 1,3,5-triazine herbicides bearing a strong PET inhibition. The PET inhibition assay with Chenopodium (wild-type and resistant), yielded a resistance ratio (R/W = I-50 (resistant)/I-50 (wild-type)) of 324 for atrazine while for benzylamino-1,3,5-triazine derivatives of diamino-1,3,5-triazines a R/W of 11 to 160 was found. The compounds having a benzylamino group at one of the amino groups in the diamino-1,3,5-triazines have a resistant ratio down to one half to 1/30 of the atrazine value. The average resistance ratio of 21 benzylamino derivatives of monoamino-1,3,5-triazines was found to be about 4.0. The inhibition of 21 benzylamino-1,3,5-triazines assayed with atrazine-resistant Chenopodium thylakoids, indicated by pI(50) (R)-values, correlated well with the PET inhibition pI(50) (W) of wildtype thylakoids from Chenopodium.
|Journal||Zeitschrift für Naturforschung. Section C : a Journal of Biosciences|
|Publication status||Published - 2002|
Okano, R., Ohki, A., Ohki, S., Kohno, H., van Rensen, J. J. S., Böger, P., & Wakabayashi, K. (2002). Photosynthetic electron transport inhibition by 2-substituted 4-alkyl-6-benzylamino-1,3,5-triazines with thylakoids from wild- type and atrazine-resistant Chenopodium album. Zeitschrift für Naturforschung. Section C : a Journal of Biosciences, 57, 1009-1015. http://www.znaturforsch.com/ac/v57c/57c1009.pdf