Effect of some herbicides on CO2 fixation, intermediates pattern, and ruDP-carboxylase and FDPase activities of spinach chloroplasts

Díaz, María A.; Chueca, Ana; Gorgé, J. López

doi:10.1016/0048-3575(80)90061-9

Cited by 5 publications

(1 citation statement)

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“…and strawberries (Fragaria spp.). The photosynthetic electron transport chain has been implicated as an important site of action of this and other faj-carbamate herbicides (5,12,13,18). Monocotyledonous species are able to tolerate phenmedipham because translocation of the herbicide to the apical meristem is limited (1, 10).…”

Section: Introductionmentioning

confidence: 99%

Metabolic Detoxification of Phenmedipham in Leaf Tissue of Tolerant and Susceptible Species

Davies¹,

Merydith²,

Mende‐Mueller³

et al. 1990

Weed sci.

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Phenmedipham metabolism in leaf tissue of sugarbeet (tolerant) and rapeseed (sensitive) was compared. Sugarbeet leaf discs metabolized phenmedipham much more rapidly than rapeseed leaf discs, forming two metabolites of relatively low polarity. The less polar of these (metabolite 21) was a precursor to the other (metabolite 11), and its properties indicate derivation from phenmedipham by a single hydroxylation and monoglycosylation. Synthetic N-hydroxyphenmedipham was converted by both species into a compound that cochromatographs with metabolite 21. Purified metabolite 21 was much less inhibitory to light-driven oxygen evolution by isolated thylakoids of both species than was phenmedipham. Hydroxylation/glycosylation without prior carbamate hydrolysis appears to be a major factor in the tolerance of sugarbeet to phenmedipham.

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Section: Introductionmentioning

confidence: 99%