Fluorescence emission spectra of paraquat resistant Conyza canadensis during the chlorophyll fluorescence induction as determined by the CCD-OMA system

Z. Szigeti, P. Richter, Hartmut K. Lichtenthaler

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

A multichannel chlorophyll spectrofluorometer based on a charge coupled device (CCD-()MA fluorosensor) was used for fast screening of the chlorophyll fluorescence characteristics of paraquat sensitive (S) and paraquat resistant (PqR) horseweed (Conyza canadensis) biotypes. It is demonstrated that S and PqR plants can easily be distinguished already from some leaf samples by only one series of fluorescence spectra measurements. The chlorophyll fluorescence parameters Fm, Fs, and the chlorophyll fluorescence ratios Rfd and F690/735, calculated from the spectra taken at different times during the fluorescence induction kinetics, clearly indicate the different paraquat sensitivity of the two horseweed biotypes. With the fluorosensor it was also shown that the paraquat resistant plants were, however, sensitive to the herbicide diuron. The results are in good agreement with earlier results achieved by more sophisticated and time consuming methods.

Original languageEnglish
Pages (from-to)574-578
Number of pages5
JournalJournal of Plant Physiology
Volume148
Issue number5
Publication statusPublished - 1996

Fingerprint

Conyza
Conyza canadensis
Paraquat
paraquat
Chlorophyll
Fluorescence
fluorescence
chlorophyll
biotypes
Diuron
diuron
Herbicides
herbicides
screening
kinetics
Equipment and Supplies
leaves

Keywords

  • chlorophyll fluorescence induction kinetics
  • Conyza canadensis
  • diuron
  • paraquat resistance

ASJC Scopus subject areas

  • Plant Science

Cite this

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title = "Fluorescence emission spectra of paraquat resistant Conyza canadensis during the chlorophyll fluorescence induction as determined by the CCD-OMA system",
abstract = "A multichannel chlorophyll spectrofluorometer based on a charge coupled device (CCD-()MA fluorosensor) was used for fast screening of the chlorophyll fluorescence characteristics of paraquat sensitive (S) and paraquat resistant (PqR) horseweed (Conyza canadensis) biotypes. It is demonstrated that S and PqR plants can easily be distinguished already from some leaf samples by only one series of fluorescence spectra measurements. The chlorophyll fluorescence parameters Fm, Fs, and the chlorophyll fluorescence ratios Rfd and F690/735, calculated from the spectra taken at different times during the fluorescence induction kinetics, clearly indicate the different paraquat sensitivity of the two horseweed biotypes. With the fluorosensor it was also shown that the paraquat resistant plants were, however, sensitive to the herbicide diuron. The results are in good agreement with earlier results achieved by more sophisticated and time consuming methods.",
keywords = "chlorophyll fluorescence induction kinetics, Conyza canadensis, diuron, paraquat resistance",
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T1 - Fluorescence emission spectra of paraquat resistant Conyza canadensis during the chlorophyll fluorescence induction as determined by the CCD-OMA system

AU - Szigeti, Z.

AU - Richter, P.

AU - Lichtenthaler, Hartmut K.

PY - 1996

Y1 - 1996

N2 - A multichannel chlorophyll spectrofluorometer based on a charge coupled device (CCD-()MA fluorosensor) was used for fast screening of the chlorophyll fluorescence characteristics of paraquat sensitive (S) and paraquat resistant (PqR) horseweed (Conyza canadensis) biotypes. It is demonstrated that S and PqR plants can easily be distinguished already from some leaf samples by only one series of fluorescence spectra measurements. The chlorophyll fluorescence parameters Fm, Fs, and the chlorophyll fluorescence ratios Rfd and F690/735, calculated from the spectra taken at different times during the fluorescence induction kinetics, clearly indicate the different paraquat sensitivity of the two horseweed biotypes. With the fluorosensor it was also shown that the paraquat resistant plants were, however, sensitive to the herbicide diuron. The results are in good agreement with earlier results achieved by more sophisticated and time consuming methods.

AB - A multichannel chlorophyll spectrofluorometer based on a charge coupled device (CCD-()MA fluorosensor) was used for fast screening of the chlorophyll fluorescence characteristics of paraquat sensitive (S) and paraquat resistant (PqR) horseweed (Conyza canadensis) biotypes. It is demonstrated that S and PqR plants can easily be distinguished already from some leaf samples by only one series of fluorescence spectra measurements. The chlorophyll fluorescence parameters Fm, Fs, and the chlorophyll fluorescence ratios Rfd and F690/735, calculated from the spectra taken at different times during the fluorescence induction kinetics, clearly indicate the different paraquat sensitivity of the two horseweed biotypes. With the fluorosensor it was also shown that the paraquat resistant plants were, however, sensitive to the herbicide diuron. The results are in good agreement with earlier results achieved by more sophisticated and time consuming methods.

KW - chlorophyll fluorescence induction kinetics

KW - Conyza canadensis

KW - diuron

KW - paraquat resistance

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