chlorophyll fluorescence, atrazine, chloroplasts, herbicide resistance
S-triazine resistance in common lambsquarters (Chenopodium album L.) has been reported previously but not in Iowa. A study was conducted using a chlorophyll a fluorescence assay to confirm the presence of resistance in C. album populations in Iowa. Variable chlorophyll a fluorescence assays confirmed that mutations conferring resistance exist in five (5) geographically separated populations of C. album in Iowa: relatively greater fluorescence yields were measured in untreated resistant tissue compared with untreated susceptible plants, relatively greater fluorescence yield in treated compared with untreated susceptible leaf disks; and similar fluorescence yields of treated and untreated resistant tissue. This is the first report of an s-triazine resistant plant found in an Iowa agroecosystem.
Journal of the Iowa Academy of Science
© Copyright 1989 by the Iowa Academy of Science, Inc.
Dekker, Jack and Burmester, Ronald
"Mutant Weeds of Iowa: s-Triazine-Resistant Plastids Chenopodium album L.,"
The Journal of the Iowa Academy of Science: JIAS: Vol. 96:
, Article 8.
Available at: http://scholarworks.uni.edu/jias/vol96/iss2/8