Physiological and biochemical modes of action of the diphenylether aclonifen

Autor: Laurent Perez, Stéphane Reynaud, Patrick Ravanel, Michel Tissut, Özgür Kilinc
Přispěvatelé: Laboratoire d'Ecologie Alpine (LECA), Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Bayer Cropscience
Jazyk: angličtina
Rok vydání: 2009
Předmět:
0106 biological sciences
Protoporphyrin IX
Health
Toxicology and Mutagenesis
[SDE.MCG]Environmental Sciences/Global Changes
[SDV.BID]Life Sciences [q-bio]/Biodiversity
Biology
01 natural sciences
oxadiazon
03 medical and health sciences
chemistry.chemical_compound
Phytoene
Aclonifen
Diphenylether
Botany
Mode of action
Carotenoid
030304 developmental biology
chemistry.chemical_classification
protoporphyrinogen
[SDV.EE]Life Sciences [q-bio]/Ecology
environment
0303 health sciences
norflurazon
oxidase
food and beverages
ether herbicides
General Medicine
biology.organism_classification
Carotenoids
cell-death
mitochondria
cotyledons
chemistry
Biochemistry
Seedling
chloroplasts
Etiolation
Protoporphyrinogen oxidase
Protoporphyrin
Herbicide acifluorfen-methyl
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
accumulation
Agronomy and Crop Science
010606 plant biology & botany
Zdroj: Pesticide Biochemistry and Physiology
Pesticide Biochemistry and Physiology, Elsevier, 2009, 93 (2), pp.65-71. ⟨10.1016/j.pestbp.2008.11.008⟩
ISSN: 0048-3575
1095-9939
DOI: 10.1016/j.pestbp.2008.11.008⟩
Popis: International audience; Aclonifen belongs to the diphenylether (DPE) chemical family among which potent herbicides with a photodependent mode of action can be found. For years aclonifen has been used in several types of cultures. However its biochemical mode of action remains unclear although it was listed as a carotenoid synthesis inhibitor by the Herbicide Resistance Action Committee (HRAC). As a matter of fact, corn seedling leaves treated with 10(-4) M aclonifen and maintained in the dark no longer contained carotenoids but showed an accumulation of a compound having all the characteristics of phytoene. That demonstrated aclonifen ability to inhibit the desaturases catalyzing the transformation of phytoene into carotenoids. Moreover, aclonifen (5 x 10(-5) M) was responsible for a photordependent cell destruction (necrosis) of cucumber cotyledons typically due to protoporphyrin IX accumulation. The same phenomenon was demonstrated in aclonifen-treated etiolated corn seedlings (10(-4) M) that showed an accumulation of protoporphyrin IX, reaching 62 ng/g of leaf fresh mass and reactive oxygen species production under light. On these two cases (cucumber cotyledons and etiolated corn seedlings), aclonifen was acting as a typical DPE, as demonstrated by the accumulation of protoporphyrin IX. As a whole, aclonifen was shown here, to act on two different biochemical pathways including carotenoid synthesis on the one hand, as well as protoporphyrinogen oxidase, in the chlorophyll synthesis pathway, on the other for the same range of concentrations. (C) 2008 Elsevier Inc. All rights reserved.
Databáze: OpenAIRE
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