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Document Type

Research

Keywords

chlorophyll fluorescence, atrazine, chloroplasts, herbicide resistance

Abstract

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.

Publication Date

June 1989

Journal Title

Journal of the Iowa Academy of Science

Volume

96

Issue

2

First Page

61

Last Page

64

Copyright

© Copyright 1989 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf