Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 349980
Title Can photosynthesis-related parameters be used to establish the activity of acetolactate synthase-inhibiting herbicides on weeds?
Author(s) Riethmuller-Haage, I.C.P.; Bastiaans, L.; Kropff, M.J.; Harbinson, J.; Kempenaar, C.
Source Weed Science 54 (2006)6. - ISSN 0043-1745 - p. 974 - 982.
Department(s) Crop and Weed Ecology
Horticultural Supply Chains
Publication type Refereed Article in a scientific journal
Publication year 2006
Keyword(s) chlorophyll fluorescence - electron-transport - leaves - light - temperature - maize - assimilation - metabolism - oxidation - responses
Abstract The application of the acetolactate synthase (ALS)¿inhibiting herbicide metsulfuron on greenhouse- and field-grown black nightshade and greenhouse-grown ladysthumb resulted in progressive inhibition of the level of carbon dioxide (CO2) fixation, the relative quantum efficiency of electron transport through photosystem I (PSI) and II (PSII), and the leaf chlorophyll content. Photosynthetic-related measurements, measured 2 to 4 d after treatment (DAT) at photon flux densities of 400 to 500 ¿mol m¿2 s¿1, provided valuable information before the visual symptoms that first appeared at 7 to 10 DAT with the herbicide. Measurements of the quantum efficiency for electron transport by photosystem II and the loss in leaf chlorophyll content appeared to be two of the most practical parameters to use when designing an early detection method to assess the toxicity of metsulfuron. The use of chlorophyll fluorescence would require a comparison of steady-state PSII measurements for control and treated plants, which could be realized by either measuring in time (before/after application) or space (treated/untreated patch)
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