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Morphophysiological traits and atrazine sensitivity in Chenopodium album L.

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2008
Authors
Pavlović, Danijela
Vrbničanin, Sava
Božić, Dragana
Fischer, Albert
Article (Published version)
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Abstract
BACKGROUND: A Chenopodium album L. biotype surviving in atrazine-treated Serbian corn fields (VC) was compared against atrazine-susceptible (S) and atrazine-resistant (R) standards. RESULTS: Atrazine (2 kg ha(-1)) killed S and VC shoot biomass 15 days after treatment (DAT), but R was only suppressed by 42% and survived 8 kg ha(-1). Atrazine at 2 kg ha(-1) only inhibited VC height by 60% as against 100 and 0% for S and R respectively. Chlorophyll fluorescence (Fv/Fm) and transpiration were insensitive to atrazine in R, but were inhibited by 90 and 100% in S and by 50 and 60% in VC respectively. Decline of Fv/Fm after 2 kg ha(-1) atrazine was stabilized at 3 DAT for the VC biotype. CONCLUSION: A toxicity mitigation mechanism could have facilitated VC survival in an atrazine-treated field. Further knowledge on this mechanism is needed to establish if surviving VC plants are indicators of atrazine resistance evolution in these Serbian corn fields. Variables related to foliar function provi...ded better detection of weed mechanisms to survive herbicide action than the usual shoot biomass measurements. (c) 2007 Society of Chemical Industry.

Keywords:
atrazine / resistance / chlorophyll fluorescence / transpiration / Chenopodium album
Source:
Pest Management Science, 2008, 64, 2, 101-107
Publisher:
  • John Wiley & Sons Ltd, Chichester

DOI: 10.1002/ps.1473

ISSN: 1526-498X

PubMed: 18022828

WoS: 000253040700001

Scopus: 2-s2.0-38349171317
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URI
http://plantarum.izbis.bg.ac.rs/handle/123456789/75
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